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SVM152-AJULY, 2000
Safety Depends on You
Lincoln arc welding and cuttingequipment is designed and builtwith safety in mind. However,your overall safety can beincreased by proper installation. . . and thoughtful operation onyour part. DO NOT INSTALL,OPERATE OR REPAIR THISEQUIPMENT WITHOUT READ-ING THIS MANUAL AND THESAFETY PRECAUTIONS CON-TAINED THROUGHOUT. And,most importantly, think beforeyou act and be careful.
SERVICE MANUAL
For use with machine code numbers 10651, 10669
INVERTEC V350-PRO
WARNING
REMOTE
POWER
OFF
ON
A A
MP
S
A
V V
OLTS
WELD TERMINALS
SELECT
OU
TPU
TLINCOLNELECTRIC
INVERTEC V350-PRO
WARNINGWARNING
AVISO DE
PRECAUCION
ATTENTION
!
!
!
!
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• Sales and Service through Subsidiaries and Distributors Worldwide •
1.a. Turn the engine off before troubleshooting and maintenancework unless the maintenance work requires it to be running.
____________________________________________________1.b. Operate engines in open, well-ventilated
areas or vent the engine exhaust fumes outdoors.
____________________________________________________1.c. Do not add the fuel near an open flame weld-
ing arc or when the engine is running. Stopthe engine and allow it to cool before refuel-ing to prevent spilled fuel from vaporizing oncontact with hot engine parts and igniting. Donot spill fuel when filling tank. If fuel is spilled,wipe it up and do not start engine until fumeshave been eliminated.
____________________________________________________1.d. Keep all equipment safety guards, covers and devices in posi-
tion and in good repair.Keep hands, hair, clothing and toolsaway from V-belts, gears, fans and all other moving partswhen starting, operating or repairing equipment.
1.e. In some cases it may be necessary to remove safetyguards to perform required maintenance. Removeguards only when necessary and replace them when themaintenance requiring their removal is complete.Always use the greatest care when working near movingparts.
___________________________________________________1.f. Do not put your hands near the engine fan.
Do not attempt to override the governor oridler by pushing on the throttle control rodswhile the engine is running.
___________________________________________________1.g. To prevent accidentally starting gasoline engines while
turning the engine or welding generator during maintenancework, disconnect the spark plug wires, distributor cap ormagneto wire as appropriate.
ARC WELDING CAN BE HAZARDOUS. PROTECT YOURSELF AND OTHERS FROM POSSIBLE SERIOUS INJURY OR DEATH.KEEP CHILDREN AWAY. PACEMAKER WEARERS SHOULD CONSULT WITH THEIR DOCTOR BEFORE OPERATING.
Read and understand the following safety highlights. For additional safety information, it is strongly recommended that youpurchase a copy of “Safety in Welding & Cutting - ANSI Standard Z49.1” from the American Welding Society, P.O. Box 351040,Miami, Florida 33135 or CSA Standard W117.2-1974. A Free copy of “Arc Welding Safety” booklet E205 is available from theLincoln Electric Company, 22801 St. Clair Avenue, Cleveland, Ohio 44117-1199.
BE SURE THAT ALL INSTALLATION, OPERATION, MAINTENANCE AND REPAIR PROCEDURES AREPERFORMED ONLY BY QUALIFIED INDIVIDUALS.
WARNING
Mar ‘95
ELECTRIC AND MAGNETIC FIELDSmay be dangerous
2.a. Electric current flowing through any conductor causes localized Electric and Magnetic Fields (EMF). Welding current creates EMF fields around welding cables and welding machines
2.b. EMF fields may interfere with some pacemakers, andwelders having a pacemaker should consult their physicianbefore welding.
2.c. Exposure to EMF fields in welding may have other healtheffects which are now not known.
2.d. All welders should use the following procedures in order tominimize exposure to EMF fields from the welding circuit:
2.d.1. Route the electrode and work cables together - Securethem with tape when possible.
2.d.2. Never coil the electrode lead around your body.
2.d.3. Do not place your body between the electrode andwork cables. If the electrode cable is on your right side, the work cable should also be on your right side.
2.d.4. Connect the work cable to the workpiece as close aspossible to the area being welded.
2.d.5. Do not work next to welding power source.
1.h. To avoid scalding, do not remove theradiator pressure cap when the engine ishot.
CALIFORNIA PROPOSITION 65 WARNINGS
Diesel engine exhaust and some of its constituentsare known to the State of California to cause can-cer, birth defects, and other reproductive harm.
The engine exhaust from this product containschemicals known to the State of California to causecancer, birth defects, or other reproductive harm.
The Above For Diesel Engines The Above For Gasoline Engines
iiSAFETYii
ARC RAYS can burn.4.a. Use a shield with the proper filter and cover
plates to protect your eyes from sparks andthe rays of the arc when welding or observingopen arc welding. Headshield and filter lensshould conform to ANSI Z87. I standards.
4.b. Use suitable clothing made from durable flame-resistantmaterial to protect your skin and that of your helpers fromthe arc rays.
4.c. Protect other nearby personnel with suitable, non-flammablescreening and/or warn them not to watch the arc nor exposethemselves to the arc rays or to hot spatter or metal.
ELECTRIC SHOCK can kill.3.a. The electrode and work (or ground) circuits
are electrically “hot” when the welder is on.Do not touch these “hot” parts with your bareskin or wet clothing. Wear dry, hole-freegloves to insulate hands.
3.b. Insulate yourself from work and ground using dry insulation.Make certain the insulation is large enough to cover your fullarea of physical contact with work and ground.
In addition to the normal safety precautions, if weldingmust be performed under electrically hazardousconditions (in damp locations or while wearing wetclothing; on metal structures such as floors, gratings orscaffolds; when in cramped positions such as sitting,kneeling or lying, if there is a high risk of unavoidable oraccidental contact with the workpiece or ground) usethe following equipment:
• Semiautomatic DC Constant Voltage (Wire) Welder.• DC Manual (Stick) Welder.• AC Welder with Reduced Voltage Control.
3.c. In semiautomatic or automatic wire welding, the electrode,electrode reel, welding head, nozzle or semiautomaticwelding gun are also electrically “hot”.
3.d. Always be sure the work cable makes a good electricalconnection with the metal being welded. The connectionshould be as close as possible to the area being welded.
3.e. Ground the work or metal to be welded to a good electrical(earth) ground.
3.f. Maintain the electrode holder, work clamp, welding cable andwelding machine in good, safe operating condition. Replacedamaged insulation.
3.g. Never dip the electrode in water for cooling.
3.h. Never simultaneously touch electrically “hot” parts ofelectrode holders connected to two welders because voltagebetween the two can be the total of the open circuit voltageof both welders.
3.i. When working above floor level, use a safety belt to protectyourself from a fall should you get a shock.
3.j. Also see Items 6.c. and 8.
FUMES AND GASEScan be dangerous.5.a. Welding may produce fumes and gases
hazardous to health. Avoid breathing thesefumes and gases.When welding, keepyour head out of the fume. Use enoughventilation and/or exhaust at the arc to keep
fumes and gases away from the breathing zone. Whenwelding with electrodes which require specialventilation such as stainless or hard facing (seeinstructions on container or MSDS) or on lead orcadmium plated steel and other metals or coatingswhich produce highly toxic fumes, keep exposure aslow as possible and below Threshold Limit Values (TLV)using local exhaust or mechanical ventilation. Inconfined spaces or in some circumstances, outdoors, arespirator may be required. Additional precautions arealso required when welding on galvanized steel.
5.b. Do not weld in locations near chlorinated hydrocarbon vaporscoming from degreasing, cleaning or spraying operations.The heat and rays of the arc can react with solvent vapors toform phosgene, a highly toxic gas, and other irritating products.
5.c. Shielding gases used for arc welding can displace air andcause injury or death. Always use enough ventilation,especially in confined areas, to insure breathing air is safe.
5.d. Read and understand the manufacturer’s instructions for thisequipment and the consumables to be used, including thematerial safety data sheet (MSDS) and follow youremployer’s safety practices. MSDS forms are available fromyour welding distributor or from the manufacturer.
5.e. Also see item 1.b. Mar ‘95
SAFETYiii iii
FOR ELECTRICALLYpowered equipment.
8.a. Turn off input power using the disconnectswitch at the fuse box before working onthe equipment.
8.b. Install equipment in accordance with the U.S. NationalElectrical Code, all local codes and the manufacturer’srecommendations.
8.c. Ground the equipment in accordance with the U.S. NationalElectrical Code and the manufacturer’s recommendations.
CYLINDER may explodeif damaged.7.a. Use only compressed gas cylinders
containing the correct shielding gas for theprocess used and properly operatingregulators designed for the gas and
pressure used. All hoses, fittings, etc. should be suitable forthe application and maintained in good condition.
7.b. Always keep cylinders in an upright position securelychained to an undercarriage or fixed support.
7.c. Cylinders should be located:• Away from areas where they may be struck or subjected tophysical damage.
• A safe distance from arc welding or cutting operations andany other source of heat, sparks, or flame.
7.d. Never allow the electrode, electrode holder or any otherelectrically “hot” parts to touch a cylinder.
7.e. Keep your head and face away from the cylinder valve outletwhen opening the cylinder valve.
7.f. Valve protection caps should always be in place and handtight except when the cylinder is in use or connected foruse.
7.g. Read and follow the instructions on compressed gascylinders, associated equipment, and CGA publication P-l,“Precautions for Safe Handling of Compressed Gases inCylinders,” available from the Compressed Gas Association1235 Jefferson Davis Highway, Arlington, VA 22202.
Mar ‘95
WELDING SPARKS cancause fire or explosion.6.a. Remove fire hazards from the welding area.
If this is not possible, cover them to preventthe welding sparks from starting a fire.Remember that welding sparks and hot
materials from welding can easily go through small cracksand openings to adjacent areas. Avoid welding nearhydraulic lines. Have a fire extinguisher readily available.
6.b. Where compressed gases are to be used at the job site,special precautions should be used to prevent hazardoussituations. Refer to “Safety in Welding and Cutting” (ANSIStandard Z49.1) and the operating information for theequipment being used.
6.c. When not welding, make certain no part of the electrodecircuit is touching the work or ground. Accidental contact cancause overheating and create a fire hazard.
6.d. Do not heat, cut or weld tanks, drums or containers until theproper steps have been taken to insure that such procedureswill not cause flammable or toxic vapors from substancesinside. They can cause an explosion even though they havebeen “cleaned”. For information, purchase “RecommendedSafe Practices for the Preparation for Welding and Cutting ofContainers and Piping That Have Held HazardousSubstances”, AWS F4.1 from the American Welding Society(see address above).
6.e. Vent hollow castings or containers before heating, cutting orwelding. They may explode.
6.f. Sparks and spatter are thrown from the welding arc. Wear oilfree protective garments such as leather gloves, heavy shirt,cuffless trousers, high shoes and a cap over your hair. Wearear plugs when welding out of position or in confined places.Always wear safety glasses with side shields when in awelding area.
6.g. Connect the work cable to the work as close to the weldingarea as practical. Work cables connected to the buildingframework or other locations away from the welding areaincrease the possibility of the welding current passingthrough lifting chains, crane cables or other alternate circuits.This can create fire hazards or overheat lifting chains orcables until they fail.
6.h. Also see item 1.c.
SAFETYiv iv
PRÉCAUTIONS DE SÛRETÉPour votre propre protection lire et observer toutes les instructionset les précautions de sûreté specifiques qui parraissent dans cemanuel aussi bien que les précautions de sûreté générales suiv-antes:
Sûreté Pour Soudage A L’Arc1. Protegez-vous contre la secousse électrique:
a. Les circuits à l’électrode et à la piéce sont sous tensionquand la machine à souder est en marche. Eviter toujourstout contact entre les parties sous tension et la peau nueou les vétements mouillés. Porter des gants secs et sanstrous pour isoler les mains.
b. Faire trés attention de bien s’isoler de la masse quand onsoude dans des endroits humides, ou sur un plancher met-allique ou des grilles metalliques, principalement dans les positions assis ou couché pour lesquelles une grandepartie du corps peut être en contact avec la masse.
c. Maintenir le porte-électrode, la pince de masse, le câble desoudage et la machine à souder en bon et sûr état defonc-tionnement.
d.Ne jamais plonger le porte-électrode dans l’eau pour lerefroidir.
e. Ne jamais toucher simultanément les parties sous tensiondes porte-électrodes connectés à deux machines à souderparce que la tension entre les deux pinces peut être le totalde la tension à vide des deux machines.
f. Si on utilise la machine à souder comme une source decourant pour soudage semi-automatique, ces precautionspour le porte-électrode s’applicuent aussi au pistolet desoudage.
2. Dans le cas de travail au dessus du niveau du sol, se protégercontre les chutes dans le cas ou on recoit un choc. Ne jamaisenrouler le câble-électrode autour de n’importe quelle partie ducorps.
3. Un coup d’arc peut être plus sévère qu’un coup de soliel, donc:
a. Utiliser un bon masque avec un verre filtrant approprié ainsiqu’un verre blanc afin de se protéger les yeux du rayon-nement de l’arc et des projections quand on soude ouquand on regarde l’arc.
b. Porter des vêtements convenables afin de protéger la peaude soudeur et des aides contre le rayonnement de l‘arc.
c. Protéger l’autre personnel travaillant à proximité ausoudage à l’aide d’écrans appropriés et non-inflammables.
4. Des gouttes de laitier en fusion sont émises de l’arc desoudage. Se protéger avec des vêtements de protection libresde l’huile, tels que les gants en cuir, chemise épaisse, pan-talons sans revers, et chaussures montantes.
5. Toujours porter des lunettes de sécurité dans la zone desoudage. Utiliser des lunettes avec écrans lateraux dans leszones où l’on pique le laitier.
6. Eloigner les matériaux inflammables ou les recouvrir afin deprévenir tout risque d’incendie dû aux étincelles.
7. Quand on ne soude pas, poser la pince à une endroit isolé dela masse. Un court-circuit accidental peut provoquer unéchauffement et un risque d’incendie.
8. S’assurer que la masse est connectée le plus prés possible dela zone de travail qu’il est pratique de le faire. Si on place lamasse sur la charpente de la construction ou d’autres endroitséloignés de la zone de travail, on augmente le risque de voirpasser le courant de soudage par les chaines de levage,câbles de grue, ou autres circuits. Cela peut provoquer desrisques d’incendie ou d’echauffement des chaines et descâbles jusqu’à ce qu’ils se rompent.
9. Assurer une ventilation suffisante dans la zone de soudage.Ceci est particuliérement important pour le soudage de tôlesgalvanisées plombées, ou cadmiées ou tout autre métal quiproduit des fumeés toxiques.
10. Ne pas souder en présence de vapeurs de chlore provenantd’opérations de dégraissage, nettoyage ou pistolage. Lachaleur ou les rayons de l’arc peuvent réagir avec les vapeursdu solvant pour produire du phosgéne (gas fortement toxique)ou autres produits irritants.
11. Pour obtenir de plus amples renseignements sur la sûreté, voirle code “Code for safety in welding and cutting” CSA StandardW 117.2-1974.
PRÉCAUTIONS DE SÛRETÉ POURLES MACHINES À SOUDER ÀTRANSFORMATEUR ET ÀREDRESSEUR
1. Relier à la terre le chassis du poste conformement au code del’électricité et aux recommendations du fabricant. Le dispositifde montage ou la piece à souder doit être branché à unebonne mise à la terre.
2. Autant que possible, I’installation et l’entretien du poste seronteffectués par un électricien qualifié.
3. Avant de faires des travaux à l’interieur de poste, la debranch-er à l’interrupteur à la boite de fusibles.
4. Garder tous les couvercles et dispositifs de sûreté à leur place.
* Overall Length Including Handle, 27.8” (706mm) without handle.
Select the output cable size based upon the following chart.Cable sizes for Combined Length of Electrode and Work Cable (Copper) 75C rated:
DUTY CYCLE CURRENT LENGTH UP 61m (200 FT) 61-76m (200-250 FT)100% 275 1/0 1/060% 350 1/0 2/0
V350-PRO INPUT CURRENT
1. When operating on these inputs, the line cord should be changed to an input conductor of 6 AWG or larger.
Recommended Fuse Sizes Based On The U.S. National Electrical Code And Maximum Machine OutputsInput 50/60 Hz Output RecommendedVoltage Phases 275Amps@ 350Amps@ Line Cord Size Fuse Size Notes
INPUT AND GROUNDING CONNECTIONS1. Only a qualified electrician should connect the
Invertec V350-PRO. Installation should be madein accordance with the U.S. National ElectricalCode, all local codes and the information detailedbelow.
2. When received directly from the factory, multiplevoltage machines are internally connected for460VAC. If 460VAC is the desired input, then themachine may be connected to the power systemwithout any setup required inside the machine.
3. Initial 200VAC - 415VAC and 575VAC operationwill require an Input voltage panel setup.
• Open the access panel on the rear of themachine.
• For 200 or 230: Position the large switch to 200-230.For higher voltages: Position the large switch to380-575.
• Move the "A" lead to the appropriate terminal.
POWER CORD CONNECTIONA 10 ft. (3.0m) power cord is provided and wired intothe machine. Follow the power cord connectioninstructions. Incorrect connection may result in equip-ment damage.
INSTALLATION
ELECTRIC SHOCK can kill.
• TURN THE INPUT POWER OFF AT THE DISCONNECT SWITCH BEFOREATTEMPTING TO CONNECT OR DIS-
CONNECT INPUT POWER LINES, OUTPUTCABLES, OR CONTROL CABLES.
• Only qualified personnel should perform thisinstallation.
• Connect the green lead of the power cord toground per U.S. National Electrical Code.
Single Phase Input1. Connect green lead to ground per U.S. National
Electrical Code.2. Connect black and white leads to power.3. Wrap red lead with tape to provide 600V insulation.
Three Phase Input1. Connect green lead to ground per U.S. National
Electric Code.2. Connect black, red and white leads to power.
Install in accordance with all local and nationalelectric codes.
PARALLEL OPERATION
The V350-Pro are operable in parallel in CC mode.For best results, the currents of each machine shouldbe reasonably well shared. As an example, with twomachines set up in parallel for a 400 amp procedure,each machine should be set to deliver approximately200 amps, not 300 amps from one and 100 ampsfrom the other. This will minimize nuisance shutdownconditions. In general, more than two machines inparallel will not be effective due to the voltagerequirements of procedures in that power range.To set machine outputs, start with output control potsand arc control pots in identical positions. Use theoutput control pots to balance the currents and main-tain the desired voltage or current. The arc controlpots should be kept identical on the two machines.
QUICK DISCONNECT PLUGS
A quick disconnect system is used for the weldingcable connections. The welding plug included with themachine is designed to accept a welding cable size of1/0 to 2/0.
1. Remote 25mm (1 in.) of welding cable insulation.
2. Slide rubber boot onto cable end. The boot endmay be trimmed to match the cable diameter.Soap or other lubricant will help to slide the bootover the cable.
3. Slide the copper tube into the brass plug.
4. Insert cable into copper tube.
WARNING
REMOTE
POWER
OFF
ON
A A
MP
S
A
V V
OLTS
WELD TERMINALS
SELECT
OU
TPU
TLINCOLNELECTRIC
INVERTEC V350-PRO
WARNINGWARNING
AVISO DE
PRECAUCION
ATTENTION
!
!
!
!
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GREENRED
BLACK
WHITE25 mm
1 in.
WELDING CABLE
BOOT
TRIM
INSTALLATIONA-4 A-4
5. Tighten set screw to collapse copper tube. Screwmust apply pressure against welding cable. Thetop of the set screw will be well below the surfaceof the brass plug after tightening.
6. Slide rubber boot over brass plug. The rubberboot must be positioned to completely cover allelectrical surfaces after the plug is locked into thereceptacle.
SET SCREW
BRASS PLUGCOPPER TUBE
Section B-1 Section B-1
V350-PRO
TABLE OF CONTENTS- OPERATION SECTION -
Operation...............................................................................................................................Section B
ELECTRIC SHOCK can kill.• Do not touch electrically live parts orelectrode with skin or wet clothing.• Insulate yourself from work andground.• Always wear dry insulating gloves.
------------------------------------------------------------------------FUMES AND GASES can be dangerous.• Keep your head out of fumes.• Use ventilation or exhaust to removefumes from breathing zone.-------------------------------------------------------
-----------------WELDING SPARKS can cause fire orexplosion.• Keep flammable material away.• Do not weld on closed containers.
------------------------------------------------------------------------ARC RAYS can burn eyes and skin.• Wear eye, ear and body
PRODUCT DESCRIPTIONThe Invertec V350-Pro offers multi mode CV and CCDC welding and is rated 350 amps, 34 volts at a 60%duty cycle. The V350-Pro is available in European andRest of the World (North America and Export) versions.Differences between these versions are input ratingsand CE noise filtering. In the different configurations,the V350-Pro is available in either a construction ver-sion (no wire feeder connection and auxiliary power)and a factory version (includes wire feeder connectionand related power).
DUTY CYCLE
The V350-Pro is rated at 350 amps, 60% duty cycle(based on a 10 minute cycle). It is also rated at 275amps, 100% duty cycle.
OPERATIONAL FEATURES and CONTROLS:
UPPER CONTROL PANEL1. AMPS Meter• Prior to STICK or TIG operation (current flow), the
meter displays preset current value (either 2 amps or+/- 3% (e.g. 3 amps on 100), whichever is greater).
• Prior to CV operation, the meter displays four dash-es indicating non-presetable AMPS.
• During welding, this meter displays actual averageamps.
• After welding, the meter holds the actual currentvalue for 5 seconds. Output adjustment while in the"hold" period results in the "prior to operation" char-acteristics stated above. The displays blink indicat-ing that the machine is in the "Hold" period.
2. VOLT METER• Prior to CV operation (current flow), the meter dis-
plays desired preset voltage value (+/- .5V).• Prior to STICK or TIG operation, the meter displays
the Open Circuit Voltage of the Power Source orfour dashes if the output has not been turned on.
• During welding, this meter displays actual averagevolts.
• After welding, the meter holds the actual voltagevalue for 5 seconds. The displays blink indicatingthat the machine is in the "Hold" period.
• Output adjustment while in the "hold" period resultsin the "prior to operation" characteristics statedabove.
3. OUTPUT CONTROL• Output control is conducted via a single turn poten-
tiometer. • Adjustment is indicated by the meters as stated
above. • When in TIG modes, this control sets the maximum
welding current. Full depression of a foot or handAmptrol results in the preset level of current.
4. WELD TERMINALS-REMOTE , ON• Two status lights indicate the location of trigger
control as determined by the "WELD TERMINALS"push button.
• If trigger control is local "weld terminals on", the ONdisplay will be lit.
• If trigger control is remote "weld terminals remotelycontrolled", the REMOTE display will be lit.
• The unit will power up in "pre-determined preferred"trigger modes.
For the Construction version all modes ON.For the Factory version STICK = ON TIG and CV = ON or REMOTE depending if remoteoutput controls are connected to the machine.
OPERATIONB-3 B-3
V350-PRO
For both the Construction and Factory versions,these trigger modes can be over-ridden (switched)with the WELD TERMINALS push button. Whenchanged, the unit will power up in the configuration itwas in when it was last powered down.
5. THERMAL• This status light indicates when the power source
has been driven into thermal overload. If the outputterminals were "ON", the "ON" light will blink indi-cating that the output will be turned back on oncethe unit cools down to an acceptable temperaturelevel. If the unit was operating in the "REMOTE"mode, the trigger will need to be opened before orafter the thermal has cleared and closed after themachine has cooled down to an acceptable temper-ature to establish output.
6. CONTROL-REMOTE , LOCAL• Two status lights indicate the location of output
control as pre-determined by the power sourcesauto-configure system.
• The LOCAL display will be lit when control is at thepower source.
• The REMOTE display will be lit when a remotepot/control is detected.
These Output Control configurations can be overrid-den (switched) with the CONTROL push button.When changed, the unit will power up in the configu-ration it was in when it was last powered down.
Hidden Middle Control Panel – ProcessSet Up PanelThe middle control panel is removable to allow forupgrades (see Field Installed Options/Accessories).Additionally, this panel is hidden by an access doorto reduce appeared complexity and provide protectionto the controls.
7. WELD MODE SELECTThe Mode Control button selects the following weld-ing modes desired.
CC-STICK SOFT: The Stick Soft process featurescontinuous control ranging from 5 to 425 amps. Thismode was intended for most SMAW applications, andArc Gouging.
• Arc Gouging: Setting the output of the Stick Softmode to 425 amps will enable the arc-gougingmode. The actual output current will depend onthe size of carbon used. The recommended maxi-mum size carbon is 5/16".
• The Hot Start control regulates the starting currentat arc initiation. Hot Start can be adjusted fromminimum (0), with no additional current added atarc start, to maximum (10), with double the presetcurrent or 425 amps (max of machine) added forthe first second after arc initiation.
• The Arc Control regulates the Arc Force to adjustthe short circuit current. The minimum setting (-10)will produce a "soft" arc and will produce minimalspatter. The maximum setting (+10) will produce a"crisp" arc and will minimize electrode sticking.
CC-STICK CRISP: The Stick Crisp mode featurescontinuous control from 5 to 425 amps. This modewas intended primarily for pipe welding applications.
• The Hot Start control regulates the starting currentat arc initiation. Hot Start can adjust starting cur-rent up or down by 25% of the preset value. Therecommended setting for Hot Start is 5 where theinitial current is equal to the preset current.
• The Arc Control regulates the relative Slope of theprocess. Slope dynamically controls the force thearc has to penetrate an open root. At the minimumsetting, Arc Control is very soft and is similar to theStick Soft mode. At the maximum setting, the slopeis reduced, the OCV is reduced, and the operatorhas full control off the arc force required to pene-trate an open root joint. For vertical down, openroot pipe welding applications, the recommendedsetting is between 8 and 10.
• During welding, a boost circuit increases the avail-able voltage to minimize pop outs. The boost cir-cuit is independent of the OCV and only operateswhen an arc is lit.
TIG GTAW: The TIG mode features continuous con-trol from 5 to 425 amps. The TIG mode can be run ineither the TIG touch start or high frequency assistedstart mode. • The Hot Start control selects the starting mode
desired. A setting of less than 5, the TIG lift startmode is selected. The OCV is controlled below 10vand the short circuit "TIG touch" current is main-tained at 25 amps independent of the preset cur-rent. When the tungsten is lifted, an arc is initiated andthe output is regulated at the preset value. Hotstart settings between 0 and 5 regulate the arc ini-tiation current. A setting of 5 results in the mostpositive arc initiation. A setting of 0 reduces hotstart.
• Hot Start settings between 5 and 10, select highfrequency assisted starting TIG mode. In thisrange, the OCV of the machine is controlledbetween 50 and 70 volts. If using the LincolnK930-1 TIG Module, set the Hot start to 10 formaximum OCV.
• The Arc Control is not used in the TIG mode.
CV-WIRE: The CV-WIRE mode features continuouscontrol from 10 to 40 volts. The mode was intendedfor most GMAW, FCAW, and MCAW applications.
• The Hot Start control is not used in the CV-WIREmode.
• The Arc Control regulates pinch effect. At the mini-mum setting (-10), minimizes pinch and results in asoft arc. Low pinch settings are preferable forwelding with gas mixes containing mostly inertgases. At the maximum setting (+10), maximizespinch effect and results in a crisp arc. High pinchsettings are preferable for welding FCAW andGMAW with CO2.
CV-FLUX CORED: The CV-FLUX CORED modefeatures continuous control from 10 to 45 volts. Thismode was designed for self-shielded flux cored wiresthat require tight voltage control.
• The Hot Start control is not used in the CV-FLUXCORED mode.
• The Arc Control regulates pinch effect. At the mini-mum setting (-10), minimizes pinch and results in asoft arc. At the maximum setting (+10), maximizespinch effect and results in a crisp arc. Most self-shielded wires work well at an Arc Control setting of 5.
8. HOT START and ARC CONTROL features havedifferent functions depending on the welding Modethat is active. Each feature is described under thewelding mode heading. (See Item 7 for specifiedMode Operation)
LOWER CASE FRONTThe output studs, line switch and remote connectorare located on the lower case front.
9. Both STUDS contain "Twist-Mate" connectorinserts.
• The Negative stud is configured to accept thepass through gas system.
10. The ON-OFF switch is a 3-phase circuit breakerrated at 100 amps per leg.
11. The METER POLARITY switch is located abovethe output connectors. The switch provides awork connection for wire feeder voltmeters.Place the switch in the position of the electrodepolarity indicated by the decal. The switch doesnot change the welding polarity.
12. 6-PIN AMPENOL for remote control.
REMOTE CONTROL of the OUTPUT CONTROLand WELD TERMINALSThe Invertec V350-Pro has auto sensing of remoteoutput controls.If after connecting or removing aremote, the Invertec V350-Pro did not configured theway you would like the local or remote control set-tings can be changed by pushing the OUTPUT CON-TROL or WELD TERMINAL button. (A user cannotselect between the 6 and 14 pin amphenols.)
CV modes• The remote will default to the 14-pin amphenol
remote if a remote is connected to either of the 14-pin amphenols and the 6-pin amphenol. Note:Only one of the 14-pin amphenols can have aremote control connected at a time. If no remote isconnected to either of the 14-pin amphenols thenthe remote will default to the 6-pin amphenol if aremote is connected to it.
• If a remote control is connected to any of theamphenols the WELD TERMINAL control willdefault to REMOTE. If there are not any remotecontrol devices attached the WELD TERMINALcontrol will default to ON.
OPERATIONB-5 B-5
V350-PRO
TIG mode• The remote will default to the 6-pin amphenol if a
remote control is connected to the 6-pin amphenoland one of the 14-pin amphenols. If a remote isnot connected to the 6-pin amphenol then theremote will default to the 14-pin amphenols if aremote is connected to one of the 14-pin amphe-nols.
• If a remote control is connected to any of theamphenols the WELD TERMINAL control willdefault to REMOTE. If there are not any remotecontrol devices attached the WELD TERMINALcontrol will default to ON.
CC-Stick modes • The remote will default to only the 6-pin amphenol if
a remote is connected to it.• The WELD TERMINAL control will default to ON
with or without a remote connected.
Types of Remote OUTPUT CONTROL• The Invertec V350-Pro’s Output Control can be
controlled by either a potentiometer connectedbetween 77 & 75 with the wiper connected to 76 ora 0V to 10V DC supply connected between 76 &75. (76 needs to be positive)
• 14-Pin Amphenol lead 75 is pin G, lead 76 is pin Fand lead 77 is pin E.
• 6-Pin Amphenol lead 75 is pin C, lead 76 is pin Band lead 77 is pin A.
Potentiometer Control• The total resistance should be between 2000 ohms
(2K) and 10,000 ohms (10K)• The machine output will be at minimum when lead
76 (wiper) is at the end of the potentiometer that isconnected to 75. The machine’s output willincrease as the wiper of the potentiometer is movedto the end that is connected to 77. (Note: In TIGmode, moving the lead 76 (wiper) to lead 77 wouldproduce the current that has been set by theInvertec V350-Pro’s front panel Output Control.)
• Remotes of this type offered by Lincoln Electric arethe K857, K812 and K870.
Voltage Control• The supply should be an isolated supply. (Not ref-
erenced to earth ground, any auxiliary power fromthe Invertec V350-Pro or the welding output) Thesupply should be capable of supplying at least20mA.
• 0 volts supplied to 76 will set the Invertec V350-Proto minimum output for the mode that has beenselected while 10 volts supplied to 76 will set theInvertec V350-Pro to the maximum output for themode. (Note: In TIG mode, 10 volts supplied tolead 76 would produce the current that has been
Types of Remote WELD TERMINAL Control• The Invertec V350-Pro’s Weld Terminals can be
controlled from each of the amphenol connectors.The circuit has a nominal OCV of 15VDC andrequires a dry contact closure (less than 100 ohms)to activate the output of the Invertec V350-Pro.
• 14 Pin Amphenols the Weld Terminals are controlledfrom pins C (lead 2) and pin D (lead 4). Pin C ispositive.
• 6 Pin Amphenol the Weld Terminals are controlledfrom pin D (lead 2) and pin E (lead 4). In the 6-pinamphenol pin D is positive.
DESIGN FEATURES and ADVANTAGES • Multiple process DC output range: 5 - 425 amps• Pre-settable welding outputs.• Built-in Line Voltage Compensation holds the output
constant over +/- 10% input fluctuations.• State of the art inverter technology yields high
power efficiency, excellent welding performance,lightweight, and compact design.
• Utilizes microprocessor control.• Electronic over current protection.• Input over voltage protection• Manual reconnect switch located on the back panel
with a clear reconnect door to allow easy determi-nation of input configuration. The reconnect door isfastened with _-turn connectors that allow quickand easy access to the reconnect area. Circuitbreaker protected auxiliary.
• System Self Configure. The power source ana-lyzes the remote controls connected to the amphe-nols and the desired welding mode to properlydetermine the location of trigger and output control.
• Modular options for easy upgrades• Back lit Status Lights for improved error communi-
cation • Circuit Breaker Input Switch• F.A.N. (fan as needed). Cooling fan runs only when
necessary • Thermostatically protected.• Designed to the IEC 974-1 Standard.• IP23S protection rating with potted PC boards for
enhanced ruggedness/reliability.• Modular construction for easy servicing.• Aluminum Chassis and Wraparound• 10 Ft. Power Cord included.
OPERATIONB-6 B-6
V350-PRO
Auxiliary Power• 115VAC, 42VAC and 24VAC power is available
from the two 14-pin amphenols on the rear of theunit. (K1728-2 Construction model of the InvertecV350-Pro does not have the amphenols) Thesesupplies are intended to supply power for auxiliaryequipment like wire feeders and the TIG Module.
• 115VAC supply is rated at 2 amps and is protectedby a 2.5 amp breaker located by the amphenol.
• 42 VAC supply is rated at 5.5 amps and is protect-ed by a 6 amp breaker located by the amphenol.
• 24 VAC supply is rated at 5.5 amps and is protect-ed by a 6 amp breaker located by the amphenol.
Limitations• The V350-Pro is not recommended for processes
other than those listed.• The V350-Pro can only be used with the recom-
mended equipment and options.
Recommended ProcessesProperly equipped, the Invertec V350-Pro supportsGMAW, FCAW, SMAW, GTAW and CAC-Aprocesses for a variety of materials, including mildsteel, stainless steel, cored wires, and aluminum.
C-1 C-1
V350-PRO
TABLE OF CONTENTS- ACCESSORIES SECTION -
Accessories...........................................................................................................................Section C
Connection of Lincoln Electric Wire Feeders..............................................................C-2 Thru C-9
V350-PRO/LN-25 with Optional 6 Pin K441-1 Remote.......................................................C-2
V350-PRO/LN-25 with Optional 6 Pin K857 Remote ..........................................................C-3
LN-25 with K431 Remote Option.........................................................................................C-4
V350-PRO/LN-25 with K867 Adapter ..................................................................................C-5
V350-PRO/LN-7 with K480 Control Cable ..........................................................................C-6
V350-PRO/LN-7 with K867 Adapter ....................................................................................C-7
CONNECTION OF THE LN-25 TO THEV350-PRO “ACROSS THE ARC” WITHOPTIONAL 6 PIN K441-1 REMOTE CON-TROL.
1. Remove input power to the V350-PRO.
2. Connect the electrode cable to the output terminalof polarity required by the electrode. Connect thework lead to the other terminal. Welding cablemust be sized for current and duty cycle of theapplication.
3. Attach the single lead from the LN-25 control boxto the work using the spring clip on the end of thelead. This is only a control lead - it carries nowelding current.
4. Set the voltmeter switch to the electrode polaritychosen.
5. Set “CONTROL SELECT” to “REMOTE”.
6. Set the “MODE” to the “CV-WIRE” position.
7. Set “WELD TERMINALS SELECT” to the “ON”
position.
If you are using an LN-25 without an internal con-tactor, the electrode will be “HOT” when the V350-PRO is energized.
8. Set the “ARC CONTROL” to the “O” position andthen adjust to suit.
CAUTION
ACCESSORIESC-2 C-2
V350-PRO
+ -
6 pin Amphenol
To WorkElectrode Cable
Optional K444-1Remote Control
LN-25Wire Feeder
Work Clip Lead
To Work
Figure C.1 V350-PRO/LN-25 ACROSS THE ARC CONNECTION DIAGRAM
NOTE: Illustation shows electrode connected for negative polarity.
CONNECTION OF THE LN-25 TO THEV350-PRO “ACROSS THE ARC” WITHOPTIONAL 6 PIN K857 REMOTE CON-TROL.
1. Remove input power to the V350-PRO.
2. Connect the electrode cable to the output terminalof polarity required by the electrode. Connect thework lead to the other terminal. Welding cablemust be sized for current and duty cycle of theapplication.
3. Connect the K857 remote control to the 6-pinamphenol on the V350-PRO.
4. Attach the single lead from the LN-25 control boxto the work using the spring clip on the end of thelead. This is only a control lead - it carries nowelding current.
5. Set the voltmeter switch to the electrode polaritychosen.
6. Set “CONTROL SELECT” to “REMOTE”.
7. Set the “MODE” to the “CV-WIRE” position.
8. Set “WELD TERMINALS SELECT” to the “ON”
position.
If you are using an LN-25 without an internal con-tactor, the electrode will be “HOT” when the V350-PRO is energized.
9. Set the “ARC CONTROL” to the “O” position andthen adjust to suit.
ACCESSORIESC-3 C-3
V350-PRO
CAUTION
NOTE: Illustration shows electrode connected for negative polarity.
Figure C.2 V350-PRO/LN-25 ACROSS THE ARC CONNECTION DIAGRAM WITH K857REMOTE CONTROL
+ -
6 pin Amphenol
To WorkElectrode Cable
LN-25Wire Feeder
Work Clip Lead
To Work
K857 Remote Control
ACCESSORIESC-4 C-4
V350-PRO
CONNECTION OF THE LN-25 WITH K431 REMOTE OPTION TO THE V350-PRO.NOTE: AN LN-25 CAN ONLY BE USED WITH A FAC-TORY OR “CE” VERSION OF THE V350-PRO.
1. Remove input power to the V350-PRO.
2. Connect the electrode cable to the output terminalof polarity required by the electrode. Connect thework lead to the other terminal. Welding cablemust be sized for current and duty cycle of theapplication.
3. Attach the single lead from the LN-25 control boxto the work using the spring clip on the end of thelead. This is only a control lead - it carries nowelding current.
4. Set the voltmeter switch to the electrode polaritychosen.
5. Set “CONTROL SELECT” to “REMOTE”.
6. Set the “MODE” to the “CV-WIRE” position.
7. Set “WELD TERMINALS SELECT” to the“REMOTE” position.
8. Set the “ARC CONTROL” to the “O” position andthen adjust to suit.
9. Connect the K432 remote control cable to the LN-25.
10. Connect the K876 adapter to the K432 and to the24/42VAC 14-pin amphenol located at the rear ofthe V350-PRO.
11. Adjust the wire feed speed and voltage at the LN-25.
NOTE: See Figure C.4 for connection Using K867adapter.
TOWORK
-
+
14 P IN (24 /42VAC)AMPHENOL
ELECTRODE CABLE �TO LN-25
K432 REMOTE�CONTROL CABLE ��INVERTEC�
POWER SOURCE��
LN-25 WITH�K431 OPT ION6 P IN AMPHENOL
K876 ADAPTER
NOTE: Illustration shows electrode connected for positive polarity.
Figure C.3 LN-25 with K431 Remote Option to the V350-PRO
ACCESSORIESC-5 C-5
V350-PRO
CONNECTION OF THE K867 ADAPTERFOR USE WITH LN-25 WITH K431OPTION/V350-PRO.
1. Insulate each unused lead individually.
2. Remove 6 pin plug from K432 cable in order toconnect K867 adapter.
3. Label each lead (A thru F) as they are removedfrom the 6 pin plug.
4. Splice leads and insulate.
TOWORK
-
+
1ELECTRODE CABLE �TO LN-25
K867 ADAPTER
LN-25 WITHK431 OPT ION
K432 REMOTECONTROL CABLE
EFDABC77
7675
SPARE42
2182 �81 �42 �41
GND3132
4INVERTEC
14 P IN
AMPHENOL (24 /42VAC)
POWER SOURCE
Figure C.4 Connection of LN-25 to V350-PRO using K867 adapter.
ACCESSORIESC-6 C-6
V350-PRO
CONNECTION OF THE LN-7 TO THE V350-PRO USING K480 CONTROL CABLE (SEEFIGURE C.5)NOTE: AN LN-7 CAN ONLY BE USED WITH A FAC-TORY OR “CE” VERSION OF THE V350-PRO. IFYOUR LN-7 COMES EQUIPPED WITH A K291 ORK404 INPUT CABLE, REFER TO THE CONNECTIONOF THE LN-7 USING K867 UNIVERSAL ADAPTER.
1. Remove input power to the V350-PRO.
2. Connect the electrode cable from the K480 controlcable to the “+” terminal of the welder and to theLN-7 wire feeder. Connect the work cable to the“-” terminal of the welder.
NOTE: Figure C.5 shows the electrode connectedfor positive polarity. To change polarity, shut thewelder off and reverse the electrode and workcables at the output terminals.
NOTE: Welding cable must be sized for currentand duty cycle of application.
3. Connect the input cable from the K480 controlcable to the (115VAC) 14 pin amphenol on theV350-PRO and the input cable plug on the LN-7.
4. Set the “VOLTMETER” switch to “+” or “-”depending on the polarity chosen.
5. Set “CONTROL SELECT” to “REMOTE”.
6. Set the “MODE” to the “CV-WIRE” position.
7. Place the “WELD TERMINALS SELECT” in the“REMOTE” position.
8. Adjust wire feed speed at the LN-7 and adjust thewelding voltage with the optional remote control ifused.
9. Set the “ARC” control at “0” initially and adjust tosuit.
- +
14 PINAMPHENOL
6 PINAMPHENOL
TO LN-7 INPUT
CABLE PLUG
TO WORK
K480 CONTROL CABLE
OPTIONAL K857REMOTE CONTROL
ELECTRODE CABLETO WIRE FEED UNIT
(115VAC)AT REAR OFMACHINE
Figure C.5 V350-PRO/LN-7 with K480 Control Cable Connection Diagram
ACCESSORIESC-7 C-7
V350-PRO
CONNECTION OF THE K867 ADAPTERFOR USE WITH THE K291 OR K404 INPUTCABLES AND LN-7.
1. Insulate each unused lead individually.
2. Splice leads and insulate.
ELECTRODE CABLETO LN-7
TOWORK
-
+
14 P INAMPHENOL
SPARE8281 �42 �41
31322 �4
21GND
7576 �77
31 �322 �4
21GND
K291 OR K404INPUT CABLE
K775 OPT IONALREMOTE CONTROL
K867 UN IVERSALADAPTER PLUG
LN-7 �CONTROL�BOX
757677
GREEN
POWER SOURCE
�
INVERTEC
�
ELECTRODE CABLETO LN-7
TOWORK
-
+
14 P IN (115VAC)AMPHENOL
SPARE8281 �42 �41
31322 �4
21GND
7576 �77
31 �322 �4
21GND
1
K291 OR K404INPUT CABLE
K775 OPT IONALREMOTE CONTROL
K867 UN IVERSALADAPTER PLUG
LN-7 �CONTROL�BOX
757677
GREEN
�
POWER SOURCE
�
INVERTEC
�
2
Figure C.6 Connection of LN-7 to V350-PRO using K867 adapter.
C-8 C-8
V350-PRO
ACCESSORIES
CONNECTION OF THE LN-742 TO THE V350-PRO (SEE FIGURE C.7)NOTE: AN LN-7 CAN ONLY BE USED WITH A FAC-TORY OR “CE” VERSION OF THE V350-PRO.
1. Remove input power to the V350-PRO.
2. Connect the electrode cable from the LN-742 tothe “+” terminal of the welder. Connect the workcable to the “-” terminal of the welder.
NOTE: Figure C.7 shows the electrode connectedfor positive polarity. To change polarity, shut thewelder off and reverse the electrode and workcables at the output terminals.
NOTE: Welding cable must be sized for currentand duty cycle of application.
3. Connect the K591 control cable to the 24/42VAC14 pin amphenol on the back of the V350-PROand the input cable plug on the LN-742.
4. Set the “VOLTMETER” switch to “+” or “-”depending on the polarity chosen.
5. Set the “MODE” to the “CV-WIRE” position..
6. Set “CONTROL SELECT” to “LOCAL”.
7. Place the “WELD TERMINALS SELECT” in the“REMOTE” position.
8. Adjust wire feed speed at the LN-742.
9. Set the “ARC” control at “0” initially and adjust tosuit.
+ -
14 PINAMPHENOL
TO LN-742 INPUT
CABLE PLUG
TO WORK
K591 CONTROL CABLE
ELECTRODE CABLETO WIRE FEED UNIT
(24/42VAC)AT REAR OFMACHINE
Figure C.7 V350-PRO/LN-742 Connection Diagram
CONNECTION OF THE LN-10 TO THEV350-
PRO USING THE K1505 CONTROL CABLE.NOTE: AN LN-10 CAN ONLY BE USED WITH A FAC-TORY OR “CE” VERSION OF THE V350-PRO.
1. Remove input power to the V350-PRO.
2. Connect the K1505 control cable from the LN-10to the Invertec 24/42VAC 14 pin amphenol con-necter on the rear of the V350-PRO.
3. Connect the electrode cable to the output terminalof polarity required by the electrode. Connect thework lead to the other terminal.
4. Set the meter polarity switch on the front of theV350-PRO to coincide with wire feeder polarityused.
5. Set “CONTROL SELECT” to “REMOTE”.
6. Set the “MODE” to the “CV-WIRE” position..
7. Set the “WELD TERMINALS SELECT” to the“REMOTE” position.
8. Set the “ARC CONTROL” to the “0” position andthen adjust to suit.
9. Set wire feed speed and voltage at the LN-10.NOTE: The voltage set point displayed on theV350-PRO should be ignored when operating inthe remote control mode with the LN-10.
10. See the LN-10 manual for details on accessingthe control DIP switch.
11. The control DIP switch inside the LN-10 should beset as shown below for operation with the V350-Pro.
1 2 3 4 5 6 7 8
Power Sources
ON
S1
S1
ACCESSORIESC-9 C-9
V350-PRO
+ -
14 PINAMPHENOL
TO LN-10
TO WORK
K1505
ELECTRODE CABLETO LN-10
(24/42VAC)AT REAR OFMACHINE
Figure C.8 LN-10 V350-PRO
ACCESSORIESC-10 C-10
V350-PRO
OPTIONS / ACCESSORIES
Construction Version – K1728-2
• All welding modes for this model run with local out-put control and weld terminals ON (e.g. Stick, TIG,LN25 off the arc).K930-1 TIG ModuleK428,K446, K449 LN-25(Off the Arc)
Factory Version – K1728-1
• The factory model is the construction model withthe addition of the Wire Feeder/Remote Adapter.
• In this form, the V350-Pro provides the hardware topower and connect to 24, 42 or 115 VAC wire feeders.
• The "CE" version is the Factory version with theaddition of power line filtering allowing the machineto comply with the European and Australian EMCemission requirements.
Field Installed Options/Accessories
Two versions of the V350-Pro are available from thefactory for both the CE and ROW versions.Options for K1728-1 Factory and K1728-3 "CE"V350’s• TIG Gas Control Kit – K1762-1
• Advance Process Panel – K1763-1
Options for all models of V350-PRO
• Undercarriage – K1764-1
Cobramatic Connection InstructionsA Cobramatic can only be used with a Factory or"CE" version of the V350
1. Turn the Invertec power switch "off"2. Connect the control cable from the Cobramatic to
the 24/42 VAC 14-pin wire feeder amphenol onthe rear of the Invertec.
3. Connect the electrode cable to the output terminalof the polarity required by electrode. Connect thework lead to the other terminal.
4. Set the meter polarity switch on the front of theInvertec to coincide with wire feeder polarity used.
5. If a remote control such as K857 is to be usedwith the Cobramatic, the remote can be connecteddirectly to the 6pin amphenol on the front of theInvertec or use a K864 adapter to connect thecobramatic and the remote to the 24/42VAC 14-pin wire feeder amphenol connector on the rear ofthe Invertec.
TIG Module K930-2The TIG Module connects to the V350-Pro Factory orCE versions with a K936-1 (9-14 pin) control cable.Connect the K936-1 to the 115VAC Wire FeederAmphenol on the rear of the V350-Pro.
The TIG Module can also be used with the V350Construction version. A K936-4 control cable isrequired to supply 115VAC to the TIG Module from anexternal 115VAC supply.
General Instructions for Connection of WireFeeders to V350-ProWire feeders other than LN-7 and LN-25 may be usedprovided that the auxiliary power supply capacity ofthe V350-Pro is not exceeded. K867 universaladapter plug is required. See connection diagramS19406 and S19386 at the back of this manual formore information.
Remote Control of InvertecRemote Control K857, Hand Amptrol K963 and FootAmptrol K870.
Section D-1 Section D-1
V350-PRO
TABLE OF CONTENTS-MAINTENANCE-
Maintenance .........................................................................................................................Section D
Major Component Locations .....................................................................................................D-4
MAINTENANCED-2 D-2
V350-PRO
- + - +
- + - +
CAPACITOR TERMINALS
POWERRESISTOR
INSULATEDGLOVES
INSULATEDPLIERS
EIGHT
FIGURE D.1 — LOCATION OF INPUT FILTERCAPACITOR TERMINALS
Have qualified personnel do the maintenancework. Always use the greatest care whenworking near moving parts.
Do not put your hands near the cooling blowerfan. If a problem cannot be corrected byfollowing the instructions, take the machine tothe nearest Lincoln Field Service Shop.
-----------------------------------------------------------------------ELECTRIC SHOCK can kill.• Do not touch electrically live parts or
electrode with skin or wet clothing.• Insulate yourself from work and
2. Using the 5/16” wrench remove the screws fromthe case wraparound cover.
3. Be careful not to make contact with the capacitorterminals located at the top and bottom of theswitch board.
4. Obtain a high resistance and high wattage resis-tor (25-1000 ohms and 25 watts minimum). Thisresistor is not with the machine. NEVER USE ASHORTING STRAP FOR THIS PROCEDURE.
5. Locate the eight capacitor terminals shown in fig-ure D.1.
6. Using electrically insulated gloves and pliers, holdthe body of the resistor with the pliers and connectthe resistor leads across the two capacitor termi-nals. Hold the resistor in place for 10 seconds.DO NOT TOUCH CAPACITOR TERMINALS WITHYOUR BARE HANDS.
7. Repeat the discharge procedure for the otherthree capacitors.
8. Check the voltage across the terminals of allcapacitors with a DC voltmeter. Polarity of thecapacitor terminals is marked on the PC boardabove the terminals. Voltage should be zero. Ifany voltage remains, repeat this capacitor dis-charge procedure.
ROUTINE MAINTENANCE
1. Every 6 months or so the machine should becleaned with a low pressure airstream. Keeping themachine clean will result in cooler operation andhigher reliability. Be sure to clean these areas:
• All printed circuit boards• Power switch• Main transformer• Input rectifier • Auxiliary Transformer• Reconnect Switch Area
2. Examine the sheet metal case for dents or breakage.Repair the case as required. Keep the case in good con-dition to insure that high voltage parts are protected andcorrect spacings are maintained. All external sheet metalscrews must be in place to insure case strength and elec-trical ground continuity.
OVERLOAD PROTECTIONThe machine is electrically protected from producinghigh output currents. Should the output current exceed430A, an electronic protection circuit will reduce thecurrent to approximately 100A. The machine will con-tinue to produce this low current until the protection cir-cuit is reset. Reset occurs when the output load isremoved.
THERMAL PROTECTIONThermostats protect the machine from excessive oper-ating temperatures. Excessive temperatures may becaused by a lack of cooling air or operating themachine beyond the duty cycle and output rating. Ifexcessive operating temperature should occur, thethermostat will prevent output voltage or current. Themeter will remain energized during this time.
Thermostats are self-resetting once the machine coolssufficiently. If the thermostat shutdown was caused byexcessive output or duty cycle and the fan is operatingnormally, the Power Switch may be left on and thereset should occur within a 15 minute period.
MAINTENANCED-3 D-3
V350-PRO
WARNING
REMOTE
POWER
OFF
ON
A A
MP
S
A
V V
OLTS
WELD TERMINALS
SELECT
OU
TPU
TLINCOLNELECTRIC
INVERTEC V350-PRO
WARNINGWARNING
AVISO DE
PRECAUCION
ATTENTION
!
!
!
!
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6
4
5
3
2
1
MAINTENANCED-4 D-4
V350-PROR
FIGURE D.2 – MAJOR COMPONENT LOCATIONS
1. Center Panel2. Base Assembly 3. Control Box Assembly4. Case Back5. Case Front6. Case Wraparound
Section E-1 Section E-1
V350-PRO
Theory of Operation .............................................................................................................Section E
General Description ....................................................................................................................E-2
Input Line Voltage, Auxiliary Transformer and Precharge...........................................................E-2
Switch Board and Main Transformer ..........................................................................................E-3
Power board, Control Board, and SPI Communications............................................................E-4
Output Rectifier and Choke ........................................................................................................E-5
GENERAL DESCRIPTIONThe Invertec V350-Pro is an inverter based weldingpower source that offers multi mode constant voltage(CV) and constant current (CC) welding and is rated at350 amps 34VDC at a 60% duty cycle. The InvertecV350-Pro is available in either a construction version(no wire feeder connection or auxiliary power ) and afactory version that includes a wire feeder connectionand related power.
INPUT LINE VOLTAGE, AUXILIARYTRANSFORMER, & PRECHARGEThe Invertec V350-Pro can be connected for a varietyof three-phase or single-phase input voltages. The ini-tial power is applied to the V350 through a combina-tion line switch/circuit breaker located on the front ofthe machine. Two phases of the input voltage areapplied to the auxiliary transformer. The auxiliary trans-former develops four different secondary voltages.The 115VAC is used to power the fan motor and alsois applied to the 14 pin amphenol type connector forwirefeeder operation. The 24VAC and 42VAC volt-ages are also applied to the 14 pin amphenol type con-nector to power wirefeeders. The 28VAC is rectified
and the resultant 40VDC is applied to the power board.
The input voltage is rectified by the input rectifier andthe resultant DC voltage is applied to the switch boardthrough the reconnect switch assembly located at therear of the machine. The reconnect switch connect thetwo pairs of input capacitors either in a parallel (lowervoltage) or series (higher voltage) configuration toaccommodate the applied input voltage.
During the precharge time the DC input voltage isapplied to the input capacitors through a current limit-ing circuit. The input capacitors are charged slowlyand current limited. A voltage to frequency convertercircuit located on the switch board monitors thecapacitor voltages. This signal is coupled to the con-trol board. When the input capacitors have chargedto an acceptable level, the control board energizes theinput relays, that are located on the switch board,making all of the input power, without current limiting,available to the input capacitors. If the capacitorsbecome under or over voltage the control board willde-energize the input relays and the V350 output willbe disabled. Other possible faults may also cause theinput relays to drop out.
THEORY OF OPERATIONE-2 E-2
V350-PRO
NOTE: Unshaded areas of Block Logic Diagram are the subject of discussion.
SWITCH BOARD & MAIN TRANSFORMERThere is one switch board in the Invertec V350-Pro.This board incorporates two pairs of input capacitors,two insulated gate bipolar transistor (IGBT) switchingcircuits, a fan motor drive circuit, and a voltage/fre-quency capacitor feedback circuit. The two capaci-tors in a pair are always in series with each other.When the reconnect switch is in the lower voltageposition the capacitor pairs are in parallel . Thus twoseries capacitors in parallel with two series capacitors.When the reconnect switch is in the high voltage posi-tion the two capacitor pairs are in series. Thus fourcapacitors in series. This is required to accommodatethe higher input voltages.
When the input capacitors are fully charged they actas power supplies for the IGBT switching circuits.When welding output is required the Insulated GateBipolar Transistors switch the DC power from the inputcapacitors, "on and off" thus supplying a pulsed DCcurrent to the main transformer primary windings. SeeIGBT Operation Discussion and Diagrams in thissection. Each IGBT switching circuit feeds current toa separate, oppositely wound primary winding in themain transformer. The reverse directions of current
flow through the main transformer primaries and theoffset timing of the IGBT switching circuits induce anAC square wave output signal at the secondary of themain transformer. The two current transformers (CT)located on the switch board monitor these primarycurrents. If the primary currents become abnormallyhigh the control board will shut off the IGBTs, thus dis-abling the machine output. The DC current flowthrough each primary winding is clamped back toeach respective input capacitor when the IGBTs areturned off. This is needed due to the inductance of thetransformer primary winding. The firing of the twoswitch boards occurs during halves of a 50 microsec-ond interval, creating a constant 20 KHZ output. Insome low open circuit Tig modes the firing frequencyis reduced to 5KHZ.
The Invertec V350-Pro has a F.A.N. fan as needed cir-cuit. The fan operates when the welding output ter-minals are energized or when a thermal over tempera-ture condition exists. Once the fan is activated it willremain on for a minimum of five minutes. The fan dri-ver circuit is housed on the switch board but it is acti-vated from a control board signal.
THEORY OF OPERATIONE-3 E-3
V350-PRONOTE: Unshaded areas of Block Logic Diagram are the subject of discussion.
FIGURE E.3 – SWITCH BOARD & MAIN TRANSFORMER
Remote Board
ModePanel
StatusPanel
Display Panel
Control Board
Choke
PositiveOutputTerminal
NegativeOutputTerminal
To Control Board
Curre
nt
Feedback
Reconnect Switch
Out
put V
olta
ge S
ense
Input switch & 100A Breaker
InputRectifier
AuxiliaryTransformer
Fan
Power Board
14 PinAmphenol
6 PinAmphenol
Remote Control & Trigger
Solenoid Supply 40VDC
RS232 Supply +5VDC
SPI Supply +15VDC +5VDC
Machine Control Supply+15VDC, -15VDC, +6VDC
40VDC 28VAC
24VAC 115VAC, 42VAC
Main Switch Board
115VAC Fan Supply
Optional Solenoid
SPI Communications & +15VDC, +5VDC Supply
Fan
Con
trol
V/F Capacitor Feedback (2)Soft Start Control
Input Relay Control
Primary Current Feedback
IGB
T Drive S
ignal
PrimaryCurrentSensor
PrimaryCurrentSensor
THEORY OF OPERATIONE-4 E-4
V350-PRO
FIGURE E.4 – POWER BOARD, CONTROL BOARD AND SERIAL PERIPHERAL INTERFACE (SPI) COMMUNICATIONS
Remote Board
ModePanel
StatusPanel
Display Panel
Control Board
Choke
PositiveOutputTerminal
NegativeOutputTerminal
To Control Board
Cu
rren
tF
ee
db
ack
Reconnect Switch
Out
put V
olta
ge S
ense
Input switch & 100A Breaker
InputRectifier
AuxiliaryTransformer
Fan
Power Board
14 PinAmphenol
6 PinAmphenol
Remote Control & Trigger
Solenoid Supply 40VDC
RS232 Supply +5VDC
SPI Supply +15VDC +5VDC
Machine Control Supply+15VDC, -15VDC, +6VDC
40VDC 28VAC
24VAC 115VAC, 42VAC
Main Switch Board
115VAC Fan Supply
Optional Solenoid
SPI Communications & +15VDC, +5VDC Supply
Fan
Con
trol
V/F Capacitor Feedback (2)Soft Start Control
Input Relay Control
Primary Current FeedbackIG
BT D
rive Signal
PrimaryCurrentSensor
PrimaryCurrentSensor
POWER BOARD, CONTROL BOARDAND SERIAL PERIPHERAL INTER-FACE (SPI) COMMUNICATIONS
POWER BOARDThe 28VAC auxiliary is rectified and filtered and appliedto the power board. The power board, utilizing aswitching power supply, processes the 40VDC inputand develops several regulated positive and negativeDC supplies. Three DC supplies are fed to the controlboard for machine control supplies. Two positive DCvoltages are coupled to the control board for the SerialPeripheral Communications (SPI) supplies. A +5VDCis used for the RS232 connection supply and a+40VDC is fed to the remote board to power anoptional gas solenoid. An over or under input voltagedetection and shutdown circuit is also part of thepower board’s circuitry.
CONTROL BOARDThe control board performs the primary interfacing
functions to establish and maintain output control ofthe V350 machine. The control board sends andreceives command signals from the mode panel, thestatus panel, the display panel and /or the optionalremote panel. These communications are processedthrough a digital network called a Serial PeripheralInterface (SPI). This network digitally communicates toand from the control board the user’s commands andvarious machine status messages. The software thatis contained within the control board processes andcompares these commands with the voltage and cur-rent feedback information it receives from the outputcurrent sensor and the output voltage sensing leads.The appropriate pulse width modulation (PWM) signals(See Pulse Width Modulation in this section) are sentto the switch board IGBTs. In this manner, the digital-ly controlled high-speed welding waveform is createdand regulated.
The control board also monitors the thermostats, themain transformer primary currents and the inputcapacitor voltages.
NOTE: Unshaded areas of Block Logic Diagram are the subject of discussion.
OUTPUT RECTIFIER AND CHOKEThe output rectifier receives the AC output from themain transformer secondary and rectifies it to a DCvoltage level. Since the output choke is in series withthe negative leg of the output rectifier and also inseries with the welding load, a filtered DC output isapplied to the machine’s output terminals.
THEORY OF OPERATIONE-5 E-5
V350-PRO
FIGURE E.5 – OUTPUT RECTIFIER AND CHOKE
Remote Board
ModePanel
StatusPanel
Display Panel
Control Board
Choke
PositiveOutputTerminal
NegativeOutputTerminal
To Control Board
Cu
rren
tF
eed
back
Reconnect Switch
Out
put V
olta
ge S
ense
Input switch & 100A Breaker
InputRectifier
AuxiliaryTransformer
Fan
Power Board
14 PinAmphenol
6 PinAmphenol
Remote Control & Trigger
Solenoid Supply 40VDC
RS232 Supply +5VDC
SPI Supply +15VDC +5VDC
Machine Control Supply+15VDC, -15VDC, +6VDC
40VDC 28VAC
24VAC 115VAC, 42VAC
Main Switch Board
115VAC Fan Supply
Optional Solenoid
SPI Communications & +15VDC, +5VDC Supply
Fan
Con
trol
V/F Capacitor Feedback (2)Soft Start Control
Input Relay Control
Primary Current Feedback
IGB
T Drive S
ignal
PrimaryCurrentSensor
PrimaryCurrentSensor
NOTE: Unshaded areas of Block Logic Diagram are the subject of discussion.
THERMAL PROTECTION
Two normally closed (NC) thermostats protect themachine from excessive operating temperatures.These thermostats are wired in series and are con-nected to the control board. One of the thermostats islocated on the heat sink of the switch board and theother is located on the output choke. Excessive tem-peratures may be caused by a lack of cooling air oroperating the machine beyond its duty cycle or outputrating. If excessive operating temperatures shouldoccur, the thermostats will prevent output from themachine. The yellow thermal light, located on the frontof the machine, will be illuminated. The thermostatsare self-resetting once the machine cools sufficiently.If the thermostat shutdown was caused by excessiveoutput or duty cycle and the fan is operating normally,the power switch may be left on and the reset shouldoccur within a 15-minute period. If the fan is not turn-ing or the air intake louvers are obstructed, then thepower must be removed from the machine, and thefan problem or air obstruction corrected.
PROTECTIVE CIRCUITS
Protective circuits are designed into the V350-PRO tosense trouble and shut down the machine beforedamage occurs to the machine's internal components.
OVER CURRENT PROTECTION
If the average current exceeds 450 amps for one sec-ond, then the output will be limited to 100 amps untilthe load is removed. If the peak current exceeds 600amps for 150 ms, the output will be limited to 100amps until the load is removed.
UNDER/OVER VOLTAGE PROTECTION
Protective circuits are included on the switch and con-trol boards to monitor the voltage across the inputcapacitors. In the event that a capacitor pair voltageis too high, or too low, the machine output will be dis-abled. The protection circuits will prevent output if anyof the following conditions exist.
1. Voltage across a capacitor pair exceeds 467volts. (High line surges or improper input voltageconnections.)
2. Voltage across a capacitor pair is under 190 volts.(Due to improper input voltage connections.)
3. Internal component damage.
THEORY OF OPERATIONE-6 E-6
V350-PRO
INSULATED GATE BIPOLARTRANSISTOR (IGBT) OPERATION
An IGBT is a type of transistor. IGBT are semiconduc-tors well suited for high frequency switching and highcurrent applications.
Example A in Figure E.8 shows an IGBT in passivemode. There is no gate signal, zero volts relative to thesource, and therefore, no current flow. The drain ter-minal of the IGBT may be connected to a voltage sup-ply; but since there is no conduction, the circuit will notsupply current to components connected to thesource. The circuit is turned OFF like a light switch.
Example B shows the IGBT in an active mode. Whenthe gate signal , a positive DC voltage relative to thesource, is applied to the gate terminal of the IGBT, it is
capable of conducting current. A voltage supply con-nected to the drain terminal will allow the IGBT to con-duct and supply current to the circuit componentscoupled to the source. Current will flow through theconducting IGBT to downstream components as longas the positive gate signal is present. This is similar toturning ON a light switch.
THEORY OF OPERATIONE-7 E-7
V350-PRO
FIGURE E.6 – IGBT
DRAIN
SOURCEGATE
INJECTING LAYER
BUFFER LAYER
DRAIN DRIFT REGION
BODY REGION
p +
n +
n -
p
n + n +
DRAIN
SOURCEGATE
INJECTING LAYER
BUFFER LAYER
DRAIN DRIFT REGION
BODY REGION
p +
n +
n -
p
n + n +
POSITIVE VOLTAGEAPPLIED
B. ACTIVEA. PASSIVE
PULSE WIDTH MODULATION
The term Pulse Width Modulation is used to describehow much time is devoted to conduction in the posi-tive and negative portions of the cycle. Changing thepulse width is known as modulation. Pulse WidthModulation (PWM) is the varying of the pulse widthover the allowed range of a cycle to affect the outputof the machine.
MINIMUM OUTPUT
By controlling the duration of the gate signal, the IGBTis turned on and off for different durations during thecycle. The top drawing in Figure E.9 shows the mini-mum output signal possible over a 50-microsecondtime period.
The positive portion of the signal represents one IGBT
group1 conducting for one microsecond. The negative
portion is the other IGBT group1. The dwell time (offtime) is 48 microseconds (both IGBT groups off). Sinceonly two microseconds of the 50-microsecond timeperiod is devoted to conducting, the output power isminimized.
MAXIMUM OUTPUT
By holding the gate signal on for 24 microsecondseach, and allowing only two microseconds of dwelltime (off time) during the 50-microsecond cycle, theoutput is maximized. The darkened area under the topcurve can be compared to the area under the bottomcurve. The more dark area that is under the curve indi-cates that more power is present.
1An IGBT group consists of two IGBT modules feeding one transformer primary winding.
THEORY OF OPERATIONE-8 E-8
V350-PRO
FIGURE E.9 — TYPICAL IGBT OUTPUTS.
MINIMUM OUTPUT
MAXIMUM OUTPUT
24
50242
4850
secsec
secsec
secsec
sec sec
V350-PRO
Section F-1 Section F-1
Troubleshooting & Repair Section .................................................................................Section F
How to Use Troubleshooting Guide ....................................................................................F-2
PC Board Troubleshooting Procedures and Replacement .................................................F-3
Test ProceduresInput Filter Capacitor Discharge Procedure .................................................................F-15 Main Switch Board Test ................................................................................................F-17Input Rectifier Test ........................................................................................................F-21Power Board Test..........................................................................................................F-25Output Diode Modules Test ..........................................................................................F-29Auxiliary Transformer Test .............................................................................................F-33Current Transducer Test ................................................................................................F-37Fan Control and Motor Test ..........................................................................................F-41SPI Cable Resistance and Voltage Test........................................................................F-45Voltage and Current Calibration Procedure ..................................................................F-47
Replacement ProceduresControl Board Removal and Replacement ...................................................................F-51Display Board Removal and Replacement ...................................................................F-57Main Switch Board Removal and Replacement ...........................................................F-61Mode Board Removal and Replacement......................................................................F-65Status Board Removal and Replacement.....................................................................F-71Snubber Board Removal and Replacement .................................................................F-75Power Board Removal and Replacement.....................................................................F-77Input Rectifier Removal and Replacement ...................................................................F-81Output Rectifier Modules Removal and Replacement .................................................F-85Current Transducer Removal and Replacement ...........................................................F-89Retest after Repair ........................................................................................................F-94
TABLE OF CONTENTSTROUBLESHOOTING & REPAIR SECTION
R
HOW TO USE TROUBLESHOOTING GUIDE
Service and repair should be performed by only Lincoln Electric Factory Trained Personnel.Unauthorized repairs performed on this equipment may result in danger to the technician and machineoperator and will invalidate your factory warranty. For your safety and to avoid Electrical Shock, pleaseobserve all safety notes and precautions detailed throughout this manual.
V350-PRO
TROUBLESHOOTING & REPAIRF-2 F-2
CAUTION
CAUTION
This Troubleshooting Guide is provided to helpyou locate and repair possible machinemalfunctions. Simply follow the three-stepprocedure listed below.
Step 1. LOCATE PROBLEM (SYMPTOM). Lookunder the column labeled “PROBLEM(SYMPTOMS)”. This column describes possiblesymptoms that the machine may exhibit. Findthe listing that best describes the symptom thatthe machine is exhibiting. Symptoms aregrouped into three main categories: OutputProblems, Function Problems, and LED FunctionProblems.
Step 2. PERFORM EXTERNAL TESTS. Thesecond column, labeled “POSSIBLE AREAS OFMISADJUSTMENT(S)”, lists the obvious externalpossibilities that may contribute to the machinesymptom. Perform these tests/checks in theorder listed. In general, these tests can beconducted without removing the casewrap-around cover.
Step 3. PERFORM COMPONENT TESTS. Thelast column, labeled “Recommended Course ofAction” lists the most likely components that mayhave failed in your machine. It also specifies theappropriate test procedure to verify that thesubject component is either good or bad. If thereare a number of possible components, check thecomponents in the order listed to eliminate onepossibility at a time until you locate the cause ofyour problem.
All of the referenced test procedures referred to inthe Troubleshooting Guide are described in detailat the end of this chapter. Refer to theTroubleshooting and Repair Table of Contents tolocate each specific Test Procedure. All of thereferred to test points, components, terminalstrips, etc., can be found on the referencedelectrical wiring diagrams and schematics. Referto the Electrical Diagrams Section Table ofContents to locate the appropriate diagram.
If for any reason you do not understand the test procedures or are unable to perform the test/repairssafely, contact the Lincoln Electric Service Department for electrical troubleshooting assistance beforeyou proceed. Call 1-800-833-9353.(WELD)
V350-PRO
ELECTRIC SHOCK can kill.
Have an electrician install and servicethis equipment. Turn the machine OFFbefore working on equipment. Do nottouch electrically hot parts.
Sometimes machine failures appear to be due to PCboard failures. These problems can sometimes betraced to poor electrical connections. To avoid prob-lems when troubleshooting and replacing PC boards,please use the following procedure:
1. Determine to the best of your technical ability thatthe PC board is the most likely component caus-ing the failure symptom.
2. Check for loose connections at the PC board toassure that the PC board is properly connected.
3. If the problem persists, replace the suspect PCboard using standard practices to avoid staticelectrical damage and electrical shock. Read thewarning inside the static resistant bag and performthe following procedures:
PC Board can be damaged bystatic electricity.
• Remove your body’s staticcharge before opening the static-shielding bag. Wear an anti-sta-tic wrist strap. For safety, use a1 Meg ohm resistive cord con-nected to a grounded part of theequipment frame.
• If you don’t have a wrist strap,touch an unpainted, grounded,part of the equipment frame.Keep touching the frame toprevent static build-up. Be surenot to touch any electrically liveparts at the same time.
• Tools which come in contact with the PC Board mustbe either conductive, anti-static or static-dissipative.
• Remove the PC Board from the static-shielding bagand place it directly into the equipment. Don’t setthe PC Board on or near paper, plastic or cloth whichcould have a static charge. If the PC Board can’t beinstalled immediately, put it back in the static-shielding bag.
• If the PC Board uses protective shorting jumpers,don’t remove them until installation is complete.
• If you return a PC Board to The Lincoln ElectricCompany for credit, it must be in the static-shieldingbag. This will prevent further damage and allowproper failure analysis.
4. Test the machine to determine if the failure symp-tom has been corrected by the replacement PCboard.
NOTE: Allow the machine to heat up so that allelectrical components can reach theiroperating temperature.
5. Remove the replacement PC board and substituteit with the original PC board to recreate the originalproblem.
a. If the original problem does not reappearby substituting the original board, then thePC board was not the problem. Continueto look for bad connections in the controlwiring harness, junction blocks, and termi-nal strips.
b. If the original problem is recreated by thesubstitution of the original board, then thePC board was the problem. Reinstall thereplacement PC board and test themachine.
6. Always indicate that this procedure was followedwhen warranty reports are to be submitted.
NOTE: Following this procedure and writing on thewarranty report, “INSTALLED AND SWITCHEDPC BOARDS TO VERIFY PROBLEM,” will helpavoid denial of legitimate PC board warrantyclaims.
TROUBLESHOOTING & REPAIRF-3 F-3
PC BOARD TROUBLESHOOTING PROCEDURES
WARNING
ATTENTIONStatic-SensitiveDevicesHandle only atStatic-SafeWorkstations
ReusableContainerDo Not Destroy
V350-PRO
TROUBLESHOOTING & REPAIRF-4 F-4
Observe Safety Guidelines TROUBLESHOOTING GUIDEdetailed in the beginning of this manual.
CAUTIONIf for any reason you do not understand the test procedures or are unable to perform the test/repairs safely, con-tact the Lincoln Electric Service Department for electrical troubleshooting assistance before you proceed. Call1-800-833-9353(WELD).
PROBLEMS(SYMPTOMS)
POSSIBLE AREAS OFMISADJUSTMENT(S)
RECOMMENDEDCOURSE OF ACTION
OUTPUT PROBLEMS
Major physical or electrical dam-age is evident when the sheetmetal cover is removed.
1. Contact your local authorizedLincoln Electric Field Service Facility for technical assistance.
1. Contact the Lincoln ElectricService Department,
1-800-833-9353(WELD).
The machine is dead—no out-put—no displays.
1. Make sure the input line/breaker switch is in the ON position.
2. Check the main input line fuses. If open , replace.
3. Check the 2 amp circuit breaker (CB2). Reset if tripped.
4. Make sure the reconnect switch and jumper lead is configured correctly for the applied input voltage.
5. If the machine is being operat-ed with single phase input volt-age make sure the red lead isnot connected. See theInstallation Section.
1. Perform the Auxiliary Transformer Test.
2. Perform the Power Board Test.
3. The control rectifier and or associated filter capacitor (C5) may be faulty. Check and replace as necessary.
4. Perform The SPI Cable Resistance and Voltage Test.
5. The Control Board may be faulty.
The main input fuses (or breaker)repeatedly fail.
1. Make certain the fuses or breakers are sized properly.
2. Make sure the reconnect switch and jumper lead is configured correctly for the applied input voltage.
3. The welding procedure may be drawing too much input current or the duty cycle may be too high. Reduce the welding current and /or reduce the duty cycle.
1. Check the reconnect switches and associated wiring. See the wiring diagram.
2. Perform the Input Rectifier Test.
3. Perform the Main Switch Board Test.
4. Perform the Output Diode Module Test.
5. The Input Filter Capacitors may be faulty. Check, and if any are faulty replace all four.
V350-PRO
TROUBLESHOOTING & REPAIRF-5 F-5
TROUBLESHOOTING GUIDE Observe Safety Guidelinesdetailed in the beginning of this manual.
CAUTIONIf for any reason you do not understand the test procedures or are unable to perform the test/repairs safely, con-tact the Lincoln Electric Service Department for electrical troubleshooting assistance before you proceed.Call 1-800-833-9353(WELD).
PROBLEMS(SYMPTOMS)
POSSIBLE AREAS OFMISADJUSTMENT(S)
RECOMMENDEDCOURSE OF ACTION
OUTPUT PROBLEMSThe V350-Pro does not have weld-ing output. The displays are lit.
1. Make sure the reconnect switch is configured correctly for the input voltage applied.
2. Make sure the Weld Terminals Select is ON. If the problem is solved the remote control device or associated circuitry may be faulty. See the wiring diagram.
3. Put the Control Select in the Local position. If the problem is solved the remote control device or associated circuitry may be faulty.
4. If an error code is displayed see Fault Code Explanations.
1. Check the reconnect switch and associated leads for loose or faulty connections. See the wiring diagram.
2. Perform the Main Switch Board Test.
3. Perform the Power Board Test.
4. Perform the Output Diode Module Test.
5. The control board may be faulty.
6. The input filter capacitors may be faulty. Check and replace if necessary.
7. The status panel board may be faulty.
The V350-Pro will not produce fulloutput.
1. The input voltage may be too low, limiting the output capability of the machine. Make certain the input voltage is correct for the machine and the reconnect switch and jumper lead configuration.
2. The welding current may be too high . The machine will fold-back to 100 amps if the welding current exceeds 450 amps.
3. Make sure the machine is in "Local" output control.. If the problem is resolved the Remote control board or the external remote control unit may be faulty.
1. Perform the Output Rectifier Test.
2. Perform the Main Switch Board Test.
3. Perform the Power Board Test.
4. Perform the Current Transducer Test.
5. If the preset function is not performing properly the status panel board or the output control may be faulty.
6. The control board may be faulty.
V350-PRO
TROUBLESHOOTING & REPAIRF-6 F-6
Observe Safety Guidelines TROUBLESHOOTING GUIDEdetailed in the beginning of this manual.
CAUTIONIf for any reason you do not understand the test procedures or are unable to perform the test/repairs safely, con-tact the Lincoln Electric Service Department for electrical troubleshooting assistance before you proceed. Call1-800-833-9353(WELD).
PROBLEMS(SYMPTOMS)
POSSIBLE AREAS OFMISADJUSTMENT(S)
RECOMMENDEDCOURSE OF ACTION
FUNCTION PROBLEMSThe machine regularly overheatsand the yellow thermal light is ONindicating a thermal overload.
1. The welding application may be exceeding the recommended duty cycle of the V350-Pro.
2. Dirt and dust may have clogged the cooling channels inside the machine.
3. Air intake and exhaust louvers may be blocked due to inade-quate clearance around the machine.
4. Make certain the fan as needed (F.A.N.) is operating properly. The fan should operate when welding voltage is present and/or when there is an over temperature condition.
1. The 115VAC fan motor is controlled by the control board via the main switch board. Perform the Fan Motor And Control Test.
1. A thermostat or associated circuitry may be faulty. See the wiring diagram. One normally closed thermostat is located on the output choke and the other is located on the main switch board heat sink. See the wiring diagram.
Note: The Main Switch Board Removal Procedure will be required to gain access to the heat sink thermostat.
An attached wire feeder will notfunction correctly.
1. Make certain the wire feeder control cable is connected to the correct 14-pin amphenol type plug (115VAC or 24/42VAC) for the wire feeder being used. See the connection diagram.
2. Check the two circuit breakers located at the rear of the machine. Reset is tripped.
3. The wire feeder or control cable may be faulty.
1. Perform the Auxiliary Transformer Test.
2. Check the leads between the 14-pin amphenol type plugs and the auxiliary transformer for loose or faulty connections.
V350-PRO
TROUBLESHOOTING & REPAIRF-7 F-7
Observe Safety Guidelines TROUBLESHOOTING GUIDEdetailed in the beginning of this manual.
CAUTIONIf for any reason you do not understand the test procedures or are unable to perform the test/repairs safely, con-tact the Lincoln Electric Service Department for electrical troubleshooting assistance before you proceed.Call 1-800-833-9353(WELD).
PROBLEMS(SYMPTOMS)
POSSIBLE AREAS OFMISADJUSTMENT(S)
RECOMMENDEDCOURSE OF ACTION
FUNCTION PROBLEMS
The machine’s welding output isvery high and uncontrollable.
1. Put the Control Select in the Local position. If the problem is solved the remote control device or associated circuitry may be faulty.
1. Perform the Current Transducer Test.
2. If the output is normal when the Control Select is in the Local position but the output is very high in the Remote position the remote board may be faulty. Perform The SPI Cable Resistance and Voltage Test.
3. The control board may be faulty.
The Weld Mode Select does notfunction properly.
1. Refer to Operation Section of this manual for normal operation characteristics.
1. Check for loose or faulty plug connections between the control board and the mode select panel. See the wiring diagram.
2. Perform the SPI Cable Resistance and Voltage Test.
3. The Mode Select Panel board may be faulty.
4. The control board may be faulty.
The Status Panel (Control andWeld Terminals Select) does notfunction properly.
1. Refer to Operation Section of this manual for normal operation characteristics.
1. Check for loose or faulty plug connections between the control board and the status board. See the wiring diagram.
2. The Status Board may be faulty.
3. The control board may be faulty.
V350-PRO
TROUBLESHOOTING & REPAIRF-8 F-8
Observe Safety Guidelines TROUBLESHOOTING GUIDEdetailed in the beginning of this manual.
CAUTIONIf for any reason you do not understand the test procedures or are unable to perform the test/repairs safely, con-tact the Lincoln Electric Service Department for electrical troubleshooting assistance before you proceed.Call 1-800-833-9353(WELD).
PROBLEMS(SYMPTOMS)
POSSIBLE AREAS OFMISADJUSTMENT(S)
RECOMMENDEDCOURSE OF ACTION
FUNCTION PROBLEMS
The display is not functioningproperly.
1. Refer to the Operation Sectionof this manual for normal operation characteristics.
1. Check for loose or faulty plug connections between the Display board and the control board. See the wiring diagram.
2. The display board may be faulty.
3. The control board may be faulty.
A fault or error code is displayed. 1. See the Fault Code Explanations.
1. See Fault Code Explanations.
For no apparent reason the weld-ing characteristics have change.
1. Check the welding cables for loose or faulty connection.
2. Make sure the machine’s mode and output are set correctly for the process being used. (CV, CC,TIG etc.)
3. If Mig welding make sure the shielding gas and wire speed are correct for the process being used.
1. Perform the Voltage and Current Calibration Procedure.
2. Perform the Current Transducer Test.
3. Perform the Output Diode Module Test
4. The control board may be faulty.
SERVICE FACILITYCORRECTIVE
ACTION
CORRECTIVE
ACTION
DESCRIPTION/
DEFINITION
31
32
Main transformer primary over current
Capacitor bank “A”(lower) is undervoltage
Turn the machine off andback on to reset themachine. If conditionpersists, contact anauthorized Lincoln FieldService Facility.
Make sure the reconnectswitches are configuredfor the input voltagebeing applied to themachine. The machineis self clearing when condition ceases.
Perform the Main SwitchBoard Test.
Perform the PowerBoard Test.
There may be a problemwith the primary currentsensors (CT) located onthe main switch board.See the Wiring diagram
The control board maybe faulty.
There may be a problemwith the V/F signals fromthe main switch board tothe control board.
Perform the Main SwitchBoard Test.
Perform the PowerBoard Test.
The control board maybe faulty.
TROUBLESHOOTING & REPAIRF-9 F-9
V350-PRO
FAULT CODES
NOTE: If more than one fault message is being displayed, perform all the checks for the faults before replacing the printed circuit board
V350-PRO
SERVICE FACILITYCORRECTIVE
ACTION
CORRECTIVE
ACTION
DESCRIPTION/
DEFINITION
33
34
Capacitor bank"B"(upper) is under voltage.
Capacitor bank"A"(lower) is over voltage.
Make sure the reconnectswitches are configuredfor the input voltagebeing applied to themachine. The machineis self-clearing when condition ceases.
Make sure the reconnectswitches are configuredfor the input voltagebeing applied to themachine. The machineis self-clearing when condition ceases.
There may be a problemwith the V/F signals fromthe main switch board tothe control board.
Perform the Main SwitchBoard Test.
Perform the PowerBoard Test.
The control board maybe faulty.
There may be a problemwith the V/F signals fromthe main switch board tothe control board.
Perform the Main SwitchBoard Test.
Perform the PowerBoard Test.
The control board maybe faulty.
TROUBLESHOOTING & REPAIRF-10 F-10
FAULT CODES
NOTE: If more than one fault message is being displayed, perform all the checks for the faults before replacing the printed circuit board
V350-PRO
SERVICE FACILITYCORRECTIVE
ACTION
CORRECTIVE
ACTION
DESCRIPTION/
DEFINITION
35
37
Capacitor bank"B"(lower) is over voltage.
The soft start function failed.
Make sure the reconnectswitches are configuredfor the input voltagebeing applied to themachine. The machineis self-clearing when condition ceases.
Turn the machine off andback on to reset themachine.
There may be a problemwith the V/F signals fromthe main switch board tothe control board.
Perform the Main SwitchBoard Test.
Perform the PowerBoard Test.
The control board maybe faulty.
There may be a problemwith the V/F signals fromthe main switch board tothe control board.
Perform the Main SwitchBoard Test.
Perform the PowerBoard Test.
The control board maybe faulty.
TROUBLESHOOTING & REPAIRF-11 F-11
FAULT CODES
NOTE: If more than one fault message is being displayed, perform all the checks for the faults before replacing the printed circuit board
V350-PRO
SERVICE FACILITYCORRECTIVE
ACTION
CORRECTIVE
ACTION
DESCRIPTION/
DEFINITION
39
43
44
Electrical "glitch" on theprimary over current faultdetector circuit.
Capacitor banks "A"(lower) and "B"(upper)are not balanced.
The machine has detected a fault in thecentral processing unit(CPU).
Possibly caused by anexternal electrical"noise" or signal level.Make sure the V350-Prois grounded correctly.The machine is self clearing when condition ceases.
Make sure the recon-nect switches are con-figured for the inputvoltage being applied tothe machine. Themachine is self-clearingwhen condition ceases.
Make sure the V350-Prois grounded correctly.The machine is self clearing when condition ceases.
Perform the Main SwitchBoard Test.
Perform the PowerBoard Test.
There may be a problemwith the primary currentsensors (CT) located onthe main switch board.See the wiring diagram.
The control board maybe faulty.
There may be a problemwith the V/F signals fromthe main switch board tothe control board.
Perform the Main SwitchBoard Test.
The capacitor(s) may befaulty. Check andreplace if necessary.
Perform the PowerBoard Test.
The control board orassociated wiring may befaulty. See the wiringdiagram.
TROUBLESHOOTING & REPAIRF-12 F-12
FAULT CODES
NOTE: If more than one fault message is being displayed, perform all the checks for the faults before replacing the printed circuit board
V350-PRO
SERVICE FACILITYCORRECTIVE
ACTION
CORRECTIVE
ACTION
DESCRIPTION/
DEFINITION
47
“bad node” “####”
Electrical "glitch" on theV/F signals from the mainswitch board to the control board.
The selected weld modedoes not exist in the weldtable that is presentlyloaded in the machine.
Possibly caused by anexternal electrical"noise" or signal level.Make sure the V350-Prois grounded correctly.The machine is self clearing when condition ceases.
Press the Mode Selectbutton to select a different welding mode.
There may be a problemwith the V/F signals fromthe main switch board tothe control board.
Perform the Main SwitchBoard Test.
Perform the PowerBoard Test.
The control board maybe faulty.
Perform the PowerBoard Test.
Perform the SPI CableResistance and VoltageTest.
The control board maybe faulty.
TROUBLESHOOTING & REPAIRF-13 F-13
FAULT CODES
NOTE: If more than one fault message is being displayed, perform all the checks for the faults before replacing the printed circuit board
NOTESF-14 F-14
V350-PRO
WARNING
Re
TROUBLESHOOTING & REPAIRF-15 F-15
V350-PRO
INPUT FILTER CAPACITOR DISCHARGE PROCEDURE
Service and repair should be performed by only Lincoln Electric factory trainedpersonnel. Unauthorized repairs performed on this equipment may result in danger tothe technician or machine operator and will invalidate your factory warranty. For yoursafety and to avoid electrical shock, please observe all safety notes and precautionsdetailed throughout this manual.
If for any reason you do not understand the test procedures or are unable to perform thetest/repairs safely, contact the Lincoln Electric Service Department for electricaltroubleshooting assistance before you proceed. Call 1-800-833-9353 (WELD).
DESCRIPTION
This procedure will drain off any charge stored in the four large capacitors that are partof the switch board assembly. This procedure MUST be performed, as a safety pre-caution, before conducting any test or repair procedure that requires you to touch inter-nal components of the machine.
MATERIALS NEEDED
5/16” Nut DriverInsulated Pliers Insulated GlovesHigh Wattage Resistor (25-1000 ohms and 25 watts minimum)DC Volt Meter
This procedure takes approximately 20 minutes to perform.
TROUBLESHOOTING & REPAIRF-16 F-16
V350-PRO
ELECTRIC SHOCK can kill.
• Have an electrician install and servicethis equipment.
• Turn the input power off at the fuse boxbefore working on equipment.
• Do not touch electrically hot parts.
• Prior to performing preventative maintenance,perform the following capacitor discharge procedureto avoid electric shock.
DISCHARGE PROCEDURE1. Remove the input power to the V350-PRO.
2. Using the 5/16” wrench remove the screws fromthe case wraparound cover.
3. Be careful not to make contact with the capacitorterminals located at the top and bottom of theswitch board.
4. Obtain a high resistance and high wattage resistor(25-1000 ohms and 25 watts minimum). Thisresistor is not with the machine. NEVER USE ASHORTING STRAP FOR THIS PROCEDURE.
5. Locate the eight capacitor terminals shown in fig-ure F.1.
6. Using electrically insulated gloves and pliers, holdthe body of the resistor with the pliers and con-nect the resistor leads across the two capacitorterminals. Hold the resistor in place for 10 sec-onds. DO NOT TOUCH CAPACITOR TERMINALSWITH YOUR BARE HANDS.
7. Repeat the discharge procedure for the otherthree capacitors.
8. Check the voltage across the terminals of allcapacitors with a DC voltmeter. Polarity of thecapacitor terminals is marked on the PC boardabove the terminals. Voltage should be zero. Ifany voltage remains, repeat this capacitor dis-charge procedure.
WARNING
- + - +
- + - +
CAPACITOR TERMINALS
POWERRESISTOR
INSULATEDGLOVES
INSULATEDPLIERS
EIGHT
FIGURE F.1 – LOCATION OF INPUT FILTER CAPACITOR TERMINALS
This procedure takes approximately 30 minutes to perform.
TROUBLESHOOTING & REPAIRF-18 F-18
V350-PRO
MAIN SWITCH BOARD TEST (continued)
FIGURE F.2 MAIN SWITCH BOARD LEAD LOCATIONS
TEST PROCEDURE
1. Remove input power to the V350-PRO.
2. Using a 5/16” nut driver, remove the casewraparound.
3. Perform the Input Filter Capacitor DischargeProcedure detailed earlier in this section.
4. Using a 7/16” wrench locate, label and removeleads 201, 202, 203, 204, 205, 206, 207 and208 from the switch board. Note lead andwasher placement for reassembly. Clearleads.
5. Using the Analog ohmmeter, perform the resis-tance tests detailed in Table F.1. Refer to fig-ure F.2 for test point locations. Note: Testusing an Analog ohmmeter on the Rx1 range.Make sure the test probes are making electri-cal contact with the conductor surfaces on thePC board.
- + - +
- + - +
208
201209
204
205
206203
J21 J20
J22202207
TROUBLESHOOTING & REPAIRF-19 F-19
V350-PRO
MAIN SWITCH BOARD TEST (continued)
TABLE F.1. SWITCH BOARD RESISTANCE TEST
6. If any test fails replace the switch board. SeeMain Switch Board Removal and Replacement.
7. If the switch board resistance tests are OK, checkconnections on plugs J20, J21, J22 and all asso-ciated wiring. See wiring diagram.
8. Reconnect leads 201, 202, 203, 204, 205, 206,207, and 208 to the switch board. Ensure that theleads are installed in their proper locations. Pre-Torque all leads nuts to 25 inch lbs. before tight-ening them to 44 inch lbs.
9. Replace the case wraparound cover using a 5/16”nut driver.
APPLY POSITIVE TESTPROBE TO TERMINAL
APPLY NEGATIVE TESTPROBE TO TERMINAL
NORMALRESISTANCE READING
+206
+208
+202
+201
+205
+203
+204
+207
-205
-203
-204
-207
-206
-208
-202
-201
Greater than 1000 ohms
Greater than 1000 ohms
Greater than 1000 ohms
Greater than 1000 ohms
Less than 100 ohms
Less than 100 ohms
Less than 100 ohms
Less than 100 ohms
NOTESF-20 F-20
V350-PRO
TROUBLESHOOTING & REPAIRF-21 F-21
V350-PRO
INPUT RECTIFIER TEST
Service and repair should be performed by only Lincoln Electric factory trained personnel.Unauthorized repairs performed on this equipment may result in danger to the technician ormachine operator and will invalidate your factory warranty. For your safety and to avoidelectrical shock, please observe all safety notes and precautions detailed throughout thismanual.
If for any reason you do not understand the test procedures or are unable to perform thetest/repairs safely, contact the Lincoln Electric Service Department for electricaltroubleshooting assistance before you proceed. Call 1-800-833-9353 (WELD).
DESCRIPTION
This test will help determine if the input rectifier has “shorted” or “open” diodes.
MATERIALS NEEDED
Analog Voltmeter/Ohmmeter (Multimeter)
5/16” Nut Driver
Phillips Head Screwdriver
Wiring Diagram
WARNING
This procedure takes approximately 25 minutes to perform.
TEST PROCEDURE
1. Remove input power to the V350-PROmachine.
2. Using a 5/16” nut driver, remove the casewraparound cover.
3. Perform the Capacitor DischargeProcedure detailed earlier in this section.
4. Locate the input rectifier and associatedleads. See Figure F.3.
5. Carefully remove the silicone sealantfrom leads 207, 207A, and 209.
6. Using a phillips head screwdriver,remove leads 207, 207A, and 209 fromthe input rectifier.
7. Use the analog ohmmeter to perform thetests detailed in Table F.2. See theWiring Diagram.
8. Visually inspect the three MOV’S fordamage (TP1,TP2,TP3). Replace if nec-essary.
TROUBLESHOOTING & REPAIRF-22 F-22
V350-PRO
INPUT RECTIFIER TEST (CONTINUED)
#207A
#207
#209A
B
C
3/16" ALLEN BOLTS
FRONT REAR
Small Lead "A"
To Circuit Breaker
Small Lead "H1"
To Auxiliary Transformer
Figure F.3 Input Rectifier
TROUBLESHOOTING & REPAIRF-23 F-23
V350-PRO
9. If the input rectifier does not meet theacceptable readings outlined in Table F.2the component may be faulty. Replace
Note: Before replacing the input rectifier,check the input power switch and per-form the Main Switch Board Test. Alsocheck for leaky or faulty filter capacitors.
10. If the input rectifier is good, be sure toreconnect leads 207, 207A, and 209 tothe correct terminals and torque to 31inch lbs. Apply silicone sealant.
11. If the input rectifier is faulty, see theInput Rectifier Bridge Removal &Replacement procedure.
12. Replace the case wraparound cover.
INPUT RECTIFIER TEST (CONTINUED)
Table F.2 Input Rectifier Test Points
TEST POINT TERMINALS ANALOG METER X10 RANGE
ABC
ABC
ABC
207207207
207A207A207A
209209209
207207207
207A207A207A
209209209
ABC
ABC
ABC
Greater than 1000 ohmsGreater than 1000 ohmsGreater than 1000 ohms
Greater than 1000 ohmsGreater than 1000 ohmsGreater than 1000 ohms
Less than 100 ohmsLess than 100 ohmsLess than 100 ohms
Less than 100 ohmsLess than 100 ohmsLess than 100 ohms
Less than 100 ohmsLess than 100 ohmsLess than 100 ohms
Greater than 1000 ohmsGreater than 1000 ohmsGreater than 1000 ohms
+ PROBE - PROBE Acceptable Meter Readings
NOTESF-24 F-24
V350-PRO
F-25 F-25
V350-PRO
TROUBLESHOOTING & REPAIR
POWER BOARD TEST
Service and repair should be performed by only Lincoln Electric factory trained personnel.Unauthorized repairs performed on this equipment may result in danger to the technician ormachine operator and will invalidate your factory warranty. For your safety and to avoidelectrical shock, please observe all safety notes and precautions detailed throughout thismanual.
If for any reason you do not understand the test procedures or are unable to perform thetest/repairs safely, contact the Lincoln Electric Service Department for electricaltroubleshooting assistance before you proceed. Call 1-800-833-9353 (WELD).
DESCRIPTION
This test will help determine if the power board is receiving the correct voltages and also ifthe power board is regulating and producing the correct DC voltages.
MATERIALS NEEDED
Volt-Ohmmeter
5/16” Nut Driver
Wiring Diagram
WARNING
This procedure takes approximately 30 minutes to perform.
TEST PROCEDURE
1. Remove input power to the V350-PROmachine.
2. Using a 5/16” nut driver, remove the casewraparound cover.
3. Perform the Capacitor DischargeProcedure detailed earlier in this section.
4. Locate the power board and plugs J41, J42and J43. Do not remove plugs from thepower board. See Figure F.4.
5. Carefully apply the correct input voltage tothe V350-PRO.
6. Carefully test for the correct voltages at thepower board. See Table F.3.
7. If the 40VDC is low, or not present at plugJ41, check the rectifier bridge and C5 filtercapacitor. See Wiring Diagram. Also per-form the Auxiliary Transformer Test.
8. If any of the DC voltages are low, or notpresent at plugs J42 or J43, the powerboard may be faulty.
9. Remove the input power to the V350-PRO.
10. Replace the case wraparound cover usinga 5/16” nut driver.
TROUBLESHOOTING & REPAIRF-26 F-26
V350-PRO
POWER BOARD TEST (CONTINUED)
J42
J41
J43
Figure F.4 Power Board Plug Location
TROUBLESHOOTING & REPAIRF-27 F-27
V350-PRO
POWER BOARD TEST (CONTINUED)Table F.3 Power Board Voltage Checks
CHECK POINTLOCATION
TESTDESCRIPTION
CONNECTORPLUG PIN NO.
LEAD NO.OR IDENTITY
NORMALACCEPTABLE
VOLTAGEREADING
POWER PCBOARD
CONNECTORPLUG J41
POWER PCBOARD
CONNECTORPLUG J42
POWER PCBOARD
CONNECTORPLUG J42
POWER PCBOARD
CONNECTORPLUG J42
POWER PCBOARD
CONNECTORPLUG J43
POWER PCBOARD
CONNECTORPLUG J43
POWER PCBOARD
CONNECTORPLUG J43
POWER PCBOARD
CONNECTORPLUG J43
CHECK +5VDCSUPPLY FROM
POWER PCBOARD
CHECK -15VDCSUPPLY FROM
POWER PCBOARD
CHECK +5VDC“SPI” SUPPLY
FROM POWER PC BOARD
CHECK +5VDC“RS232”
SUPPLY FROMPOWER PC
BOARD
CHECK +15VDC“SPI” SUPPLY
FROM POWERPC BOARD
CHECK +40VDCOPTIONALSOLENOID
SUPPLY FROMPOWER PC BOARD
408 (+)410 (-)
411 (+)410 (-)
403 (+)401 (-)
406 (+)405 (-)
402 (+)401 (-)
438 (+)431 (-)
5 VDC
-15 VDC
5 VDC
5 VDC
15 VDC
40 VDC
CHECK +15VDCSUPPLY FROM
POWER PCBOARD
412 (+)410 (-)
15 VDC
CHECK 40VDCSUPPLY FROMRECT. BRIDGETO POWER BD.
65 (+)66 (-)
38-42 VDC
65 66
2(+)1(-)
410
412
1(+)5(-)
410
408
3(+)5(-)
410
411
2(+)5(-)
403
4013(+)12(-)
406
4054(+)9(-)
402
401
6(+)12(-)
431
438
8(+)1(-)
NOTESF-28 F-28
V350-PRO
OUTPUT DIODE MODULES TEST
Service and repair should be performed by only Lincoln Electric factory trained personnel.Unauthorized repairs performed on this equipment may result in danger to the technician ormachine operator and will invalidate your factory warranty. For your safety and to avoidelectrical shock, please observe all safety notes and precautions detailed throughout thismanual.
If for any reason you do not understand the test procedures or are unable to perform thetest/repairs safely, contact the Lincoln Electric Service Department for electricaltroubleshooting assistance before you proceed. Call 1-800-833-9353 (WELD).
DESCRIPTION
This test will help determine if any of the output diodes are “shorted”.
MATERIALS NEEDED
Analog Voltmeter/OhmmeterWiring Diagram
TROUBLESHOOTING & REPAIRF-29 F-29
V350-PRO
WARNING
This procedure takes approximately 20 minutes to perform.
TROUBLESHOOTING & REPAIRF-30 F-30
V350-PRO
OUTPUT DIODE MODULES TEST (continued)
TEST PROCEDURE
1. Remove input power to the V350-PRO.
2. Locate the output terminals on the frontpanel of the machine. See Figure F.5.
3. Remove any output cables and load from theoutput terminals.
4. Using the analog ohmmeter test for morethan 200 ohms resistance between positiveand negative output terminals. Positive testlead to the positive terminal; Negative testlead to the negative terminal. See FigureF.6.
NOTE: The polarity of the test leads is mostimportant. If the test leads polarity is not cor-rect, the test will have erroneous results.
FIGURE F.5 Machine Output Terminals
OFFOFF
OFFOFF OFFOFF OFFOFFONON
HOHOT STT STARTWELD MODEWELD MODE ARC CONTRARC CONTROL
CC-STICK SOFTCC-STICK SOFT
CC-STICK CRISPCC-STICK CRISP
TIG GTTIG GTAW
CVCV-WIRE-WIRE
CVCV-FLUX CORED-FLUX CORED
-4-4 +4+4
+2+2-2-20
-6-6 +6+6
-10-10SOFTSOFT CRISPCRISP
+10+10
-8-8 +8+8
54
3
2
1
0
6
1010
9
8
7
SELECTSELECT
REMOREMOTEONON
REMOREMOTELOCALLOCAL
m
WELD WELD TERMINALSTERMINALS
OUTPUTOUTPUT
CONTRCONTROLOL
SELECTSELECT SELECTSELECT
MPSMPSA OLOLTSTSV
NEGATIVE OUTPUTTERMINAL
POSITIVE OUTPUTTERMINAL
TROUBLESHOOTING & REPAIRF-31 F-31
V350-PRO
OUTPUT DIODE MODULES TEST (continued)
5. If 200 ohms is measured then the outputdiodes are not “shorted”.
NOTE: There is a 200 ohm resistor across thewelding output terminals.
6. If less than 200 ohms is measured, one ormore diodes or the snubber board may befaulty.
7. Perform the Filter Capacitor DischargeProcedure detailed in the maintenance sec-tion.
8. Locate the output diode modules and snub-ber board. See Figure F.7.
9. Test all output diode modules individually.
NOTE: This may require the disassembly ofthe leads and the snubber board from thediode modules. Refer to the Output DiodeModules Removal and ReplacementProcedure for detailed instructions.
Figure F.6 Terminal Close-Up
OFF
OFFOFF OFFOFF OFFOFFONON
- PR
OB
E
+ PR
OB
E
TROUBLESHOOTING & REPAIROUTPUT DIODE MODULES TEST (continued)
F-32 F-32
V350-PRO
Figure F.7 Snubber and Output Diode Locations
LEFT SIDE
Snubber Board
Output Diode Modules
AUXILIARY TRANSFORMER TEST
Service and repair should be performed by only Lincoln Electric factory trained personnel.Unauthorized repairs performed on this equipment may result in danger to the technician ormachine operator and will invalidate your factory warranty. For your safety and to avoidelectrical shock, please observe all safety notes and precautions detailed throughout thismanual.
If for any reason you do not understand the test procedures or are unable to perform thetest/repairs safely, contact the Lincoln Electric Service Department for electricaltroubleshooting assistance before you proceed. Call 1-800-833-9353 (WELD).
DESCRIPTION
This procedure will determine if the correct voltage is being applied to the primary of auxil-iary transformer and also if the correct voltage is being induced on the secondary windingsof the transformer.
MATERIALS NEEDED
Volt-ohmmeter (Multimeter)
5/16” Nut Driver
Wiring Diagram
TROUBLESHOOTING & REPAIRF-33 F-33
V350-PRO
WARNING
This procedure takes approximately 25 minutes to perform.
TROUBLESHOOTING & REPAIRF-34 F-34
V350-PRO
AUXILIARY TRANSFORMER TEST (continued)
TEST PROCEDURE
1. Remove input power to the V350-PRO.
2. Using a 5/16” nut driver, remove the casewraparound cover.
3. Perform the Input Capacitor DischargeProcedure detailed earlier in this section.
4. Locate the auxiliary transformer. See FigureF.8.
5. Locate the secondary leads and plugs P52and P56. See Figure F.8 and F.9.
FIGURE F.8 Auxiliary Transformer
FIGURE F.9 Plug Lead Connections Viewed From Transformer Lead Side of Plug
WARNING
REMOTE
POWER
OFF
ON
A A
MP
S
A
V V
OLTS
WELD TERMINALS
SELECT
OU
TPU
TLINCOLNELECTRIC
INVERTEC V350-PRO
Auxiliary Transformer
Secondary Lead Plugs P52 and P56
LEAD 541 LEAD
31
LEAD 24
LEAD 42
LEAD 532
PLUG P52
LEAD 41A
LEAD 54
PLUG P56
TROUBLESHOOTING & REPAIR
AUXILIARY TRANSFORMER NO.1 TEST (continued)
F-35 F-35
V350-PRO
7. Carefully apply the correct input voltage to theV350-PRO and check for the correct sec-ondary voltages per table F.4. Make sure thereconnect jumper lead and switch are config-ured correctly for the input voltage beingapplied. Make sure circuit breaker (CB2) isfunctioning properly.
NOTE: The secondary voltages will vary if theinput line voltage varies.
8. If the correct secondary voltages are present,the auxiliary transformer is functioning proper-ly. If any of the secondary voltages are miss-ing or low, check to make certain the primaryis configured correctly for the input voltageapplied. See Wiring Diagram.
High voltage is present at primary ofAuxiliary Transformer.
9. If the correct input voltage is applied to theprimary, and the secondary voltage(s) are notcorrect, the auxiliary transformer may befaulty.
10. Remove the input power to the V350-PRO.
11. Install the case wraparound cover using a5/16” nut driver.
TABLE F.4
WARNING
LEAD IDENTIFICATION NORMAL EXPECTED VOLTAGE
31 TO 532 115 VAC
42 TO 541
24 TO 541
42 VAC
24 VAC
28 VAC54 TO 41A
NOTESF-36 F-36
V350-PRO
TROUBLESHOOTING AND REPAIRF-37 F-37
V350-PRO
CURRENT TRANSDUCER TEST
Service and repair should be performed by only Lincoln Electric factory trained personnel.Unauthorized repairs performed on this equipment may result in danger to the technician ormachine operator and will invalidate your factory warranty. For your safety and to avoidelectrical shock, please observe all safety notes and precautions detailed throughout thismanual.
If for any reason you do not understand the test procedures or are unable to perform thetest/repairs safely, contact the Lincoln Electric Service Department for electricaltroubleshooting assistance before you proceed. Call 1-800-833-9353 (WELD).
DESCRIPTION
This test will help determine if the current transducer and associated wiring are functioningcorrectly.
MATERIALS NEEDED
Volt-ohmmeter
5/16” Nut Driver
Grid Bank
External DC Ammeter
This procedure takes approximately 45 minutes to perform.
WARNING
TROUBLESHOOTING AND REPAIRCURRENT TRANSDUCER TEST (continued)
F-38 F-38
V350-PRO
TEST PROCEDURE
1. Remove input power to the V350-PRO.
2. Using the 5/16” nut driver, remove the casewraparound cover.
3. Perform the Input Capacitor DischargeProcedure.
4. Using the 5/16” nut driver, remove the controlbox top and cut any necessary cable ties. SeeFigure F.10.
5. Locate plug J8 on the control board. Do notremove the plug from the P.C. Board.
6. Apply the correct input power to the V350-PRO.
7. Check for the correct DC supply voltages tothe current transducer at plug J8. See FigureF.11.
A. Pin 2 (lead 802+) to pin 6 (lead 806-)should read +15 VDC.
B. Pin 4 (lead 804+) to pin 6 (lead 806-)should read -15 VDC.
8. If either of the supply voltages are low or miss-ing, the control board may be faulty.
FIGURE F.10 Metal Plate Removal & Plug J8 Location
802801
804
806
Plug J8
FIGURE F.11. Plug J8 Viewed From Lead Side of Plug
WARNING
REMOTE
POWER
OFF
ON
A A
MP
S
A
V V
OLTS
WELD TERMINALS
SELECT
OU
TPU
TLINCOLNELECTRIC
INVERTEC V350-PRO
Metal Plate
5/16" Screws
Plug J8
TROUBLESHOOTING AND REPAIRCURRENT TRANSDUCER TEST (continued)
F-39 F-39
V350-PRO
9. Check the feedback voltage from the currenttransducer using a resistive load bank andwith the V350-PRO in mode 200. Mode 200 isa constant current test mode. This mode canbe accessed from the front panel of the V350by pressing and holding the Mode Select but-ton while turning the machine on. Then, rotatethe output knob while still holding the ModeSelect button in until the displays read “Mode200”. Release the Mode Select Button andthe machine will be in mode 200. With theV350-PRO in mode 200, apply the grid loadacross the output of the V350-PRO, setmachine output to 300 amps and enableWELD TERMINALS. Adjust the grid load toobtain 300 amps on the external ammeter andcheck feedback voltages per Table F.5.
A. Pin 1 (lead 801) to Pin 6 (lead 806) shouldread 2.4 VDC (machine loaded to 300amps).
10. If for any reason the machine cannot beloaded to 300 amps, Table F.5. shows whatfeedback voltage is produced at various cur-rent loads.
11. If the correct supply voltages are applied tothe current transducer, and with the machineloaded, the feedback voltage is missing or notcorrect the current transducer may be faulty.Before replacing the current transducer, checkthe leads and plugs between the control board(J8) and the current transducer (J90). See TheWiring Diagram. For access to plug J90 andthe current transducer refer to: CurrentTransducer Removal and ReplacementProcedure.
12. Remove input power to the V350-PRO.
13. Replace the control box top and any cable tiespreviously removed.
14. Install the case wraparound cover using the5/16” nut driver.
TABLE F.5
OUTPUT LOAD CURRENT EXPECTED TRANSDUCER FEEDBACKVOLTAGE
300
250
200
150
100
2.4
2.0
1.6
1.2
0.8
NOTESF-40 F-40
V350-PRO
TROUBLESHOOTING AND REPAIRF-41 F-41
V350-PRO
FAN CONTROL AND MOTOR TEST
Service and repair should be performed by only Lincoln Electric factory trained personnel.Unauthorized repairs performed on this equipment may result in danger to the technician ormachine operator and will invalidate your factory warranty. For your safety and to avoidelectrical shock, please observe all safety notes and precautions detailed throughout thismanual.
If for any reason you do not understand the test procedures or are unable to perform thetest/repairs safely, contact the Lincoln Electric Service Department for electricaltroubleshooting assistance before you proceed. Call 1-800-833-9353 (WELD).
DESCRIPTION
This test will help determine if the fan motor, control board, switch board, or associated leadsand connectors are functioning correctly.
MATERIALS NEEDED
Voltmeter
5/16” Nut Driver
WARNING
This procedure takes approximately 40 minutes to perform.
TROUBLESHOOTING AND REPAIRFAN CONTROL AND MOTOR TEST (continued)
F-42 F-42
V350-PRO
TEST PROCEDURE
1. Remove the input power to the V350-PROmachine.
2. Using the 5/16” nut driver, remove the casewraparound cover.
3. Perform the Input Filter Capacitor DischargeProcedure.
4. Locate plug J22 on the main switch board. Donot remove the plug from the board. SeeFigure F.12.
5. Carefully apply the correct input power to themachine.
6. Carefully check for 115VAC at plug J22 pin-2to J22 pin-3. (leads 115B to COM 2) SeeFigure F.13. WARNING: HIGH VOLTAGE ISPRESENT AT THE MAIN SWITCH BOARD.
J21 J20
J22
Fan LeadLead Com 2
Fan Lead Lead 115 B
Plug J22
FIGURE F.13 PLUG J22
FIGURE F.12 PLUG J22 LOCATION
Lead 716-
Plug J20
Lead 715+
TROUBLESHOOTING AND REPAIRFAN CONTROL AND MOTOR TEST (continued)
F-43 F-43
V350-PRO
7. If the 115VAC is low or not present performThe Auxiliary Transformer Test. Also checkplug J22 and associated leads for loose orfaulty connections. See the Wiring Diagram.
8. Energize the weld output terminals (SelectWeld Terminals ON) and carefully check for115VAC at plug J22 pin-1 to J22 pin-4 (fanleads). See Figure F.13. If the 115VAC is pre-sent and the fan is not running then the fanmotor may be faulty. Also check the associat-ed leads between plug J22 and the fan motorfor loose or faulty connections. See the WiringDiagram. WARNING: HIGH VOLTAGE ISPRESENT AT THE SWITCH BOARD.
9. If the 115VAC is NOT present in the previousstep then proceed to the fan control test.
FAN CONTROL TEST PROCEDURE
1. Locate plug J20 on the switch board. Do notremove the plug from the switch board. SeeFigure F.12 and Figure F.14.
2. Energize the weld output terminals (SelectWeld Terminals ON) and carefully check for+15VAC at plug J20 pin-6+ to J20 pin-2- (leads715 to 716). See Figure F.14. If the 15VAC ispresent and the fan is not running then theswitch board may be faulty. If the 15VDC isnot present when the weld terminals are ener-gized then the control board may be faulty.Also check plugs J20, J7, and all associatedleads for loose or faulty connections. See theWiring Diagram.
WARNING: HIGH VOLTAGE IS PRESENT ATTHE SWITCH BOARD.
3. Remove the input power to the V350-PRO.
Note: The fan motor may be accessed by theremoval of the rear panel detailed in TheCurrent Transducer Removal andReplacement Procedure.
4. Replace the case wrap-around cover.
FIGURE F.14 PLUG J20
NOTESF-44 F-44
V350-PRO
TROUBLESHOOTING AND REPAIRF-45 F-45
V350-PRO
SPI CABLE RESISTANCE AND VOLTAGE TEST
Service and repair should be performed by only Lincoln Electric factory trained personnel.Unauthorized repairs performed on this equipment may result in danger to the technician ormachine operator and will invalidate your factory warranty. For your safety and to avoidelectrical shock, please observe all safety notes and precautions detailed throughout thismanual.
If for any reason you do not understand the test procedures or are unable to perform thetest/repairs safely, contact the Lincoln Electric Service Department for electricaltroubleshooting assistance before you proceed. Call 1-800-833-9353 (WELD).
DESCRIPTION
This test will help determine if there is a possible “open” in the SPI cable and also determineif the correct supply voltages are being applied to the boards in the SPI network.
MATERIALS NEEDED
Volt/Ohmmeter
5/16” Nut Driver
WARNING
This procedure takes approximately 35 minutes to perform.
TROUBLESHOOTING AND REPAIRSPI CABLE RESISTANCE AND VOLTAGE TEST (continued)
F-46 F-46
V350-PRO
TEST PROCEDURE
1. Remove the input power to the V350-PRO.
2. Using the 5/16” nut driver, remove the casewraparound cover.
3. Perform the Capacitor Discharge Procedure.
4. Using a 5/16” nut driver, remove the controlbox top. Cut any necessary cable ties.
5. Perform the Display Board RemovalProcedure. Do not remove the SPI ribboncable connecting the display board to the sta-tus board. If a remote board is present, the SPIcable plug connecting the remote board to thedisplay board will have to be removed from thedisplay board.
6. Locate and remove plug J3 from the controlboard. See Figure F.15.
7. Check the resistance and continuity of the SPIcable by testing with the ohmmeter from each pin on plug J3 to the corresponding pins onthe plug removed from the display board. See the machine schematic drawing.
8. The resistance reading pin to correspondingpin should be zero ohms or very low resis-tance. If the resistance reading is high or“open” check the plug connections to the SPInetwork PC boards. If the connections are OKand the resistance is high or “open” the SPIcable may be faulty.
9. Using the ohmmeter check the continuity ofthe remote board SPI cable from the plug (pre-viously connected to the display board) to theplug on the remote board.
10. Reconnect the plugs into the display boardand perform the Display Board ReplacementProcedure.
11. With plug J3 still removed from the controlboard, carefully apply the correct input powerto V350-PRO.
12. Turn on the machine.
13. Carefully check for the presence of +15VDCfrom plug J3 pin -1(+) to plug J3 pin -10(-) atthe control board receptacle. See Figure F.15.
14. Carefully check for the presence of +5VDCfrom plug J3 pin -2(+) to plug J3 pin -10(-) atthe control board receptacle. See Figure F.15.
15. If either of these voltages are low or not pre-sent, the control board may be faulty. Replace.
16. Remove the input power to the V350-PROmachine.
17. Replace plug J3 into the control board.
18. Replace the control box top and any cable tiespreviously removed.
19. Replace the case wrap-around cover.
Plug J3
Pin 10
Pin 1
Pin 2
FIGURE F.15 Plug J3
Right Side
J3
VOLTAGE AND CURRENT CALIBRATION PROCEDURE
Service and repair should be performed by only Lincoln Electric factory trained personnel.Unauthorized repairs performed on this equipment may result in danger to the technician ormachine operator and will invalidate your factory warranty. For your safety and to avoidelectrical shock, please observe all safety notes and precautions detailed throughout thismanual.
If for any reason you do not understand the test procedures or are unable to perform thetest/repairs safely, contact the Lincoln Electric Service Department for electricaltroubleshooting assistance before you proceed. Call 1-800-833-9353 (WELD).
DESCRIPTION
This test will help determine if the machine is capable of producing welding output and tocheck and adjust, if necessary, the voltage and or current calibration.
MATERIALS NEEDED
Resistive Load Bank
Calibrated Test Voltmeter
Calibrated Test Ammeter
TROUBLESHOOTING AND REPAIRF-47 F-47
V350-PRO
WARNING
This procedure takes approximately 20 minutes to perform.
TROUBLESHOOTING AND REPAIRVOLTAGE AND CURRENT CALIBRATION PROCEDURE (continued)
F-48 F-48
V350-PRO
CALIBRATION CHECK
The calibration of the V350-PRO can be checkedusing a resistive load bank with the V350-PRO inmode 200. Mode 200 is a constant current testmode.
1. Press and hold in the Mode Select button.
2. Turn on the V350-PRO.
3. Rotate the output knob, while still holding themode select button in, until the displays read“mode 200”.
4. Release the Mode Select button and themachine will be in mode 200.
5. With the machine in mode 200 apply a resistiveload to the welding output terminals (approxi-mately .087 ohms) set the machine output to300 amps and enable the Weld Terminals.(Weld Terminals Select ON).
6. Using the test meters note the output voltageand current.
7. The V350-PRO voltmeter must match the testmeter reading to within +/- 1 volt.
8. The V350-PRO ammeter must match the testmeter within +/- 5 amps.
9. If the voltmeter does not meet the specificationthen proceed to the Voltage CalibrationProcedure.
10. If the ammeter does not meet the specificationthen proceed to the Current CalibrationProcedure.
NOTE: Before attempting to calibrate the voltage or current setting of the V350-PRO, be sure to readthe entire voltage or current calibration section. Ifthe steps are not completed quickly, the machinewill automatically leave the calibration mode with-out changing the calibration settings. The voltageand current calibration settings of the V350-PROare completely independent of each other.Adjusting one will not affect the other.
VOLTAGE CALIBRATION
1. Connect the resistive load band (approximate-ly .087 ohms) and test voltmeter to the weldingoutput terminals.
2. Press and hold in the Mode Select button.
3. Turn on the V350-PRO.
4. Rotate the Output Control knob until the dis-play reads “vol cAL”.
5. Release the Mode Select button.
6. Adjust the output control knob until the actualoutput voltage reading on the test volt meter is 20volts +/- .5 volts.
7. Wait for the machine’s output to be automati-cally turned off and then back on.
8. Adjust the Output Control knob again if neces-sary to make the actual voltage output 20 volts+/- .5 volts.
9. Wait for the machine’s output to be automati-cally turned off and then back on.
10. Repeat the above two steps if necessary.
11. Press and release the Mode Select button tosave the calibration.
NOTE: If the Mode Select button is notpressed within 30 seconds after adjusting theOutput Control knob the machine will leave thecalibration mode and use the previous calibra-tion settings.
CURRENT CALIBRATION PROCEDURE
1. Connect the resistive load band (approxi-mately .087 ohms) and test ammeter to thewelding output terminals.
2. Press and hold in the Mode Select button.
3. Turn on the V350-PRO.
4. Rotate the Output Control knob until thedisplay reads “cur cAL”.
5. Release the Mode Select button.
6. The left display will change to “IcAL” toindicate that current calibration is inprogress.
7. The right display will scroll the followingmessage: Adj oCP SorEAL cur-300A.
8. Adjust the Output Control knob until theactual output current reading on the testammeter is 300amps +/-2A.
9. Wait for the machines output to be automatically turned off and then back on.
10. Adjust the Output Control knob again ifnecessary to make the actual output cur-rent reading on the test ammeter 300amps +/-2A.
11. Wait for the machines output to be a u t o -matically turned off and then back on.
12. Repeat the above two steps if necessary.
13. Press and release the Mode Select buttonto save the calibration.
14. The left display will scroll the message IcALSAVEd.
15. The machine will reset to normal operation.
NOTE: If the Mode Select button is notpressed within 30 seconds after adjustingthe Output Control knob the machine willleave the calibration mode and use the pre-vious calibration settings.
TROUBLESHOOTING AND REPAIRVOLTAGE AND CURRENT CALIBRATION PROCEDURE (continued)
F-49 F-49
V350-PRO
NOTESF-50 F-50
V350-PRO
CONTROL BOARD REMOVAL AND REPLACEMENT
Service and repair should be performed by only Lincoln Electric factory trained personnel.Unauthorized repairs performed on this equipment may result in danger to the technician ormachine operator and will invalidate your factory warranty. For your safety and to avoidelectrical shock, please observe all safety notes and precautions detailed throughout thismanual.
If for any reason you do not understand the test procedures or are unable to perform thetest/repairs safely, contact the Lincoln Electric Service Department for electricaltroubleshooting assistance before you proceed. Call 1-800-833-9353) (WELD).
DESCRIPTION
The following procedure will aid the technician in removing the control board for maintenanceor replacement.
MATERIALS NEEDED
5/16” Nut Driver
3/8” Nut Drive
Flathead Screwdriver
Phillips Head Screwdriver
V350-PRO
TROUBLESHOOTING & REPAIRF-51 F-51
WARNING
This procedure takes approximately 45 minutes to perform.
V350-PRO
TROUBLESHOOTING & REPAIRF-52 F-52
PROCEDURE
1. Remove input power to the V350-PRO.
2. Using a 5/16” nut driver remove the case wrap-around cover.
3. Perform the Input Filter Capacitor DischargeProcedure detailed earlier in this section.
4. Locate the control board behind the front panel ofthe machine. See Figure F.16.
5. Using a 5/16” nut driver remove the four screwsfrom the top and bottom of the front of themachine. See Figure F.17.
6. Using a phillips head screwdriver remove the sixscrews and their washers from around the inputpower switch. See Figure F.17.
7. Using a phillips head screwdriver remove the fourscrews from around the two welder output termi-nals on the front of the machine. See Figure F.17.
Observe static precautions detailed in PCBoard Troubleshooting Procedures at thebeginning of this section.
8. The front of the machine may now gently be pulledforward to gain access to the Control Board. Note:The front of the machine cannot be removed com-pletely, only pulled forward a few inches.
9. Using a 5/16” nut driver or a flathead screwdriverremove the metal plate on the top of the machinethat holds the case front assembly to the centerpanel. There are two nylon cable ties that willneed to be cut in order for the metal plate to beremoved. See Figure F.18.
10. The control board is now accessible to replace.
CAUTION
V350-PRO
TROUBLESHOOTING & REPAIRF-53 F-53
WARNING
REMOTE
POWER
OFF
ON
A A
MP
S
A
V V
OLTS
WELD TERMINALS
SELECT
OU
TPU
TLINCOLNELECTRIC
INVERTEC V350-PRO
Metal Plate
5/16" Screws
Plug J8
FIGURE F.18. - METAL PLATE LOCATION
CONTROL BOARD REMOVAL AND REPLACEMENT (continued)
V350-PRO
11.. Beginning at the right side of the machineremove plugs J10A and J10B. Note: Be sure tolabel each plugs position upon removal. SeeFigure F.19.
12. Working your way across the top of the boardfrom right to left, label and remove plugs #J9,#J8, #J7, #J6, and #J5. See Figure F.19.
13. Working your way down the left side of the board,remove plugs #J4 and #J3. See Figure F.19.
TROUBLESHOOTING & REPAIRCONTROL BOARD REMOVAL AND REPLACEMENT (continued)
F-54 F-54
FIGURE F.19 CONTROL BOARD PLUG LOCATION
Right Side
J10B
J10A
J9J8J7J6J5
J4
J3
F-55 F-55
V350-PRO
14. Using a 3/8” nut driver remove the four mountingnuts from the four corners of the control board.See Figure F.20.
15. Remove the control board. Note: Gentle pryingfrom behind the board using a flathead screw-driver may be required.
16. Replace the control board.
TROUBLESHOOTING & REPAIRCONTROL BOARD REMOVAL AND REPLACEMENT (continued)
FIGURE F.20 CONTROL BOARD MOUNTING SCREW LOCATION
Right Side
MountingScrews
17. Replace the four 3/8” mounting nuts at the cor-ners of the board.
19. Using a 5/16” nut driver, replace the metal plateon the top of the machine that holds the casefront assembly to the center panel. Replace allcable ties previously removed.
20. Replace the four phillips head screws removedfrom the front of the machine located around thetwo welder output terminals.
21. Replace the six phillips head screws and theirwashers from around the input power switch.
22. Using a 5/16” nut driver replace the four screwspreviously removed from the front of the machine
23. Replace the case wraparound cover.
TROUBLESHOOTING & REPAIRCONTROL BOARD REMOVAL AND REPLACEMENT (continued)
F-56 F-56
V350-PRO
DISPLAY BOARD REMOVAL AND REPLACEMENT
Service and repair should be performed by only Lincoln Electric factory trained personnel.Unauthorized repairs performed on this equipment may result in danger to the technician ormachine operator and will invalidate your factory warranty. For your safety and to avoidelectrical shock, please observe all safety notes and precautions detailed throughout thismanual.
If for any reason you do not understand the test procedures or are unable to perform thetest/repairs safely, contact the Lincoln Electric Service Department for electricaltroubleshooting assistance before you proceed. Call or 1-800-833-9353 (WELD).
DESCRIPTION
The following procedure will aid the technician in removing the display board for maintenanceor replacement.
MATERIALS NEEDED
5/16” Nut Driver
Flathead Screwdriver
Phillips Head Screwdriver
V350-PRO
TROUBLESHOOTING & REPAIRF-57 F-57
WARNING
This procedure takes approximately 30 minutes to perform.
V350-PRO
TROUBLESHOOTING & REPAIRF-58 F-58
FIGURE F.21 – DISPLAY BOARD LOCATION
WARNING
REMOTE
POWER
OFF
ON
A A
MP
S
A
V V
OLTS
WELD TERMINALS
SELECT
OU
TPU
TLINCOLNELECTRIC
INVERTEC V350-PRO
L11130-1
CS71D1
Display Board
L11107-2
STATUS INPUT
Status Board
L11110-1
MODE SELECT
Mode Board
DISPLAY BOARD REMOVAL & REPLACEMENT (continued)
PROCEDURE
1. Remove input power to the V350-PRO.
2. Using a 5/16” nut driver remove the casewraparound cover.
3. Perform the Input Filter CapacitorDischarge Procedure detailed earlier in thissection.
4. Locate the display board behind the frontpanel of the machine. See Figure F.21.
HOT STARARTWELD MODEWELD MODE ARC CONTRARC CONTROLOL
CC-STICK SOFTCC-STICK SOFT
CC-STICK CRISPCC-STICK CRISP
TIG GTTIG GTAW
CVCV-WIRE-WIRE
CVCV-FLUX CORED-FLUX CORED
-4-4 +4+4
+2+2-2-20
-6-6 +6+6
-10-10SOFTSOFT CRISPCRISP
+10+10
-8-8 +8+8
54
3
2
1
0
6
1010
9
8
7
SELECTSELECT
REMOREMOTETEONON
REMOREMOTETELOCALLOCAL
m
WELD WELD TERMINALSTERMINALS
OUTPUTOUTPUT
CONTRCONTROLOL
SELECTSELECT SELECTSELECT
MPSMPSA OLOLTSTSV
5. Using a 5/16” nut driver remove the fourscrews from the top and bottom of the front ofthe machine. See Figure F.22.
6. Using a phillips head screwdriver remove thesix screws and their washers from around theinput power switch. See Figure F.22.
7. Using a phillips head screwdriver remove thefour screws from around the two welder out-put terminals on the front of the machine. SeeFigure F.22.
8. The front of the machine may now gently bepulled forward to gain access to the displayBoard. Note: The front of the machine cannotbe removed completely, only pulled forward afew inches.
9. The display board is now accessible toreplace.
10. Remove plug #J37 from the display board.
11. Remove plug #J3 originating from the controlboard located directly across from the displayboard.
12. Remove the display board. Note: Gentle pryingfrom behind the board may be required.
13. Replace the display board.
14. Replace plugs #J3 and #J37 previously removed.
15. Replace the four phillips head screws removedfrom the front of the machine located around thetwo welder output terminals.
16. Replace the six phillips head screws and theirwashers from around the input power switch.
17. Using a 5/16” nut driver replace the four screwspreviously removed from the front of the machine
Service and repair should be performed by only Lincoln Electric factory trained personnel.Unauthorized repairs performed on this equipment may result in danger to the technician ormachine operator and will invalidate your factory warranty. For your safety and to avoidelectrical shock, please observe all safety notes and precautions detailed throughout thismanual.
If for any reason you do not understand the test procedures or are unable to perform thetest/repairs safely, contact the Lincoln Electric Service Department for electricaltroubleshooting assistance before you proceed. Call 1-800-833-9353 (WELD).
DESCRIPTION
The following procedure will aid the technician in removing the main switch board for main-tenance or replacement.
MATERIALS NEEDED5/16” Nut Driver
Flathead Screwdriver
7/16” mm Socket
3/16” Allen Wrench
3/8” Nut Driver
V350-PRO
TROUBLESHOOTING & REPAIRF-61 F-61
WARNING
This procedure takes approximately 35 minutes to perform.
PROCEDURE
1. Remove the input power to the V350-PRO.
2. Using a 5/16” nut driver remove the case wrap-around cover.
3. Perform the Input Filter Capacitor DischargeProcedure detailed earlier in this section.
Observe static precautions detailed in PC Board
Troubleshooting Procedures at the beginning of
this section. Failure to do so can result in perma-
nent damage to equipment.
4. Locate the main switch board and all associat-ed plug and lead connections. See figure F.23.See Wiring Diagram.
5. Using a 5/16” and 3/8” nut driver remove theinput lead shield from the area at the bottom ofthe main switch board.
6. Using a 7/16” socket, remove leads 201, 202,203, 204, 205, 206, 207, 208, 209 from theswitch board. Note lead terminals locationsand washer positions upon removal.
7. Locate and disconnect the three harness plugsassociated with the main switch board. Plugs#J20, #J21, #J22. See Figure F.23.
8. Locate the eight capacitor terminals andremove the nuts using a 7/16” socket or nutdriver. Note the position of the washers behindeach nut for replacement.
CAUTION
V350-PRO
TROUBLESHOOTING & REPAIRF-62 F-62
FIGURE F.23 – MAIN SWITCH BOARD LEAD LOCATIONS
MAIN SWITCH BOARD REMOVAL & REPLACEMENT (continued)
- + - +
- + - +
208
201209
204
205
206203
J21 J20
J22202207
V350-PRO
TROUBLESHOOTING & REPAIRF-63 F-63
FIGURE F.24 – 3/16” ALLEN BOLT LOCATION
FIGURE F.25 – NYLON MOUNTING PIN
- + - +
- + - +
3/16" ALLEN BOLTS
MAIN SWITCH BOARD REMOVAL & REPLACEMENT (continued)
9. Using a 3/16” allen wrench remove four allenbolts and washers as shown in Figure F.24.At this point, the board is ready for removal.Carefully remove the board from the 4 nylonmounting pins. Note: Depress the retainingpins on the sides of the nylon mounts torelease the board. See Figure F.25.
10. Carefully maneuver the board out of themachine.
11. Apply a thin coat of Penetrox A-13 to theIGBT heatsinks on the back of the newswitch boards mating surfaces. Note: Keepcompound away from the mounting holes.
12. Mount the new board on the nylon mount-ing pins.
13. Replace the four allen bolts and washerspreviously removed.
14. Replace the eight capacitor terminal nuts,washers, and necessary leads previouslyremoved.
15. Reconnect the three harness plugs previous-ly removed.
16. Reconnect the nine leads (#201-#209) thatwere previously removed.
17. Pre-torque all screws to 25 inch lbs. beforetightening to 44 inch lbs.
18. Replace the case wraparound cover.
DEPRESS LOCKING TAB ON MOUNTING PIN
NOTESF-64 F-64
V350-PRO
MODE BOARDREMOVAL AND REPLACEMENT
Service and repair should be performed by only Lincoln Electric factory trained personnel.Unauthorized repairs performed on this equipment may result in danger to the technician ormachine operator and will invalidate your factory warranty. For your safety and to avoidelectrical shock, please observe all safety notes and precautions detailed throughout thismanual.
If for any reason you do not understand the test procedures or are unable to perform thetest/repairs safely, contact the Lincoln Electric Service Department for electricaltroubleshooting assistance before you proceed. Call 1-800-833-9353 (WELD).
DESCRIPTION
The following procedure will aid the technician in removing the mode board for maintenanceor replacement.
MATERIALS NEEDED
5/16” Nut Driver
Small Flathead Screwdriver
Phillips Head Screwdriver
1/4” Wrench
V350-PRO
TROUBLESHOOTING & REPAIRF-65 F-65
WARNING
This procedure takes approximately 30 minutes to perform.
V350-PRO
TROUBLESHOOTING & REPAIRF-66 F-66
FIGURE F.26 – MODE BOARD LOCATION
WARNING
REMOTE
POWER
OFF
ON
A A
MP
S
A
V V
OLTS
WELD TERMINALS
SELECT
OU
TPU
TLINCOLNELECTRIC
INVERTEC V350-PRO
L11130-1
CS71D1
Display Board
L11107-2
STATUS INPUT
Status Board
L11110-1
MODE SELECT
Mode Board
MODE BOARDREMOVAL AND REPLACEMENT (continued)
PROCEDURE
1. Remove input power to the V350-PRO.
2. Using a 5/16” nut driver remove the casewraparound cover.
3. Perform the Input Filter CapacitorDischarge Procedure detailed earlier in thissection.
4. Locate the mode board behind the front panelof the machine. See Figure F.26.
TROUBLESHOOTING & REPAIRF-67 F-67
V350-PRO
FIGURE F.27 – CASE FRONT SCREW REMOVAL
Input Power Switch Screws
Welder OutputTerminal Screws
5/16" Screws
5/16" Screws
OFFOFF
OFF OFF OFFONON
HOT STARTWELD MODE ARC CONTROL
CC-STICK SOFTCC-STICK SOFT
CC-STICK CRISPCC-STICK CRISP
TIG GTTIG GTAW
CVCV-WIRE-WIRE
CVCV-FLUX CORED-FLUX CORED
-4-4 +4+4
+2+2-2-20
-6-6 +6+6
-10-10SOFTSOFT CRISPCRISP
+10+10
-8-8 +8+8
54
3
2
1
0
6
1010
9
8
7
SELECTSELECT
REMOREMOTETEONON
REMOREMOTETELOCALLOCAL
m
WELD WELD TERMINALSTERMINALS
OUTPUTOUTPUT
CONTRCONTROLOL
SELECTSELECT SELECTSELECT
MPSMPSA OLOLTSTSV
MODE BOARDREMOVAL AND REPLACEMENT (continued)
5. Using a 5/16” nut driver remove the fourscrews from the top and bottom of the front ofthe machine. See Figure F.27.
6. Using a phillips head screwdriver remove thesix screws and their washers from around theinput power switch. See Figure F.27.
7. Using a phillips head screwdriver remove thefour screws from around the two welder outputterminals on the front of the machine. SeeFigure F.27.
8. The front of the machine may now gently bepulled forward to gain access to the modeboard. Note: The front of the machine cannotbe removed completely, only pulled forward afew inches.
TROUBLESHOOTING & REPAIRF-68 F-68
V350-PRO
MODE BOARDREMOVAL AND REPLACEMENT (continued)
FIGURE F.28. – CASE FRONT
9. Remove plug #J34 from the mode board.
10. Remove plug #J31 originating from the statusboard located directly above the mode board.
11. Open the cover of the weld mode display onthe front of the machine.
12. Using a 5/16” nut driver, remove the three5/16” screws as shown in Figure F.28.
13. Carefully maneuver the the mode faceplate upand away from the machine. The bottom ofthe plate will come out first. Note: The modeboard will still be attached to its mountingplate.
14. Place both knobs in the full counter clockwiseposition to gain access to the mountingscrews.
15. Using a small flathead screwdriver, loosen thescrew in the “Hot Start” knob and the “ArcControl” knob. The knobs should slide off oftheir shafts. See Figure F.29.
16. Using a 1/4” wrench remove the nuts and theirwashers behind the “Hot Start” and “ArcControl” knobs.
17. Remove the mode board by gently prying frombehind the board.
19. Replace the 1/4” nuts and their washers thatmount the “Hot Start” and “Arc Control”knobs.
20. Using a small screwdriver replace the twoknobs previously removed. Be sure to placeboth potentiometers in the full counter clock-wise position and position knobs for propercalibration.
21. Replace the three 5/16” screws previouslyremoved from the front of the machine locatedaround the mode board knobs.
22. Replace plugs #J31 and #J34 previouslyremoved.
23. Replace the four phillips head screws removedfrom the front of the machine located aroundthe two welder output terminals.
24. Replace the six phillips head screws and theirwashers from around the input power switch.
25. Using a 5/16” nut driver replace the fourscrews previously removed from the front ofthe machine
26. Replace the case wraparound cover.
NOTESF-70 F-70
V350-PRO
STATUS BOARD REMOVAL AND REPLACEMENT
Service and repair should be performed by only Lincoln Electric factory trained personnel.Unauthorized repairs performed on this equipment may result in danger to the technician ormachine operator and will invalidate your factory warranty. For your safety and to avoidelectrical shock, please observe all safety notes and precautions detailed throughout thismanual.
If for any reason you do not understand the test procedures or are unable to perform thetest/repairs safely, contact the Lincoln Electric Service Department for electricaltroubleshooting assistance before you proceed. Call 1-800-833-9353 (WELD).
DESCRIPTION
The following procedure will aid the technician in removing the status board for maintenanceor replacement.
MATERIALS NEEDED
5/16” Nut Driver
Flathead Screwdriver
Phillips Head Screwdriver
V350-PRO
TROUBLESHOOTING & REPAIRF-71 F-71
WARNING
This procedure takes approximately 30 minutes to perform.
V350-PRO
TROUBLESHOOTING & REPAIRF-72 F-72
FIGURE F.30 – STATUS BOARD LOCATION
WARNING
REMOTE
POWER
OFF
ON
A A
MP
S
A
V V
OLTS
WELD TERMINALS
SELECT
OU
TPU
TLINCOLNELECTRIC
INVERTEC V350-PRO
L11130-1
CS71D1
Display Board
L11107-2
STATUS INPUT
Status Board
L11110-1
MODE SELECT
Mode Board
STATUS BOARD REMOVAL AND REPLACEMENT (continued)
PROCEDURE
1. Remove input power to the V350-PRO.
2. Using a 5/16” nut driver remove the casewraparound cover.
3. Perform the Input Filter CapacitorDischarge Procedure detailed earlier in thissection.
4. Locate the status board behind the frontpanel of the machine. See Figure F.30.
V350-PRO
TROUBLESHOOTING & REPAIRF-73 F-73
STATUS BOARD REMOVAL AND REPLACEMENT (continued)
5. Using a 5/16” nut driver remove the four screwsfrom the top and bottom of the front of themachine. See Figure F.31.
6. Using a phillips head screwdriver remove the sixscrews and their washers from around the inputpower switch. See Figure F.31.
7. Using a phillips head screwdriver remove the fourscrews from around the two welder output termi-nals on the front of the machine. See Figure F.31.
8. The front of the machine may now gently be pulledforward to gain access to the status Board. Note: The front of the machine cannot be removedcompletely, only pulled forward a few inches.
10. Remove plug #J311 and plug #J31 from the sta-tus board.
11. Remove plug #J37 originating from the displayboard located directly above the status board.
12. Remove the status board. Note: Gentle pryingfrom behind the board will be required.
13. Replace the status board.
14. Replace plug #J37 previously removed.
15. Replace plug #J31 and plug #J311 previouslyremoved.
16. Replace the four phillips head screws removedfrom the front of the machine located around thetwo welder output terminals.
17. Replace the six phillips head screws and theirwashers from around the input power switch.
18. Using a 5/16” nut driver replace the four screwspreviously removed from the front of the machine
19. Replace the case wraparound cover.
TROUBLESHOOTING & REPAIRF-74 F-74
V350-PRO
STATUS BOARD REMOVAL AND REPLACEMENT (continued)
SNUBBER BOARD REMOVAL AND REPLACEMENT
Service and repair should be performed by only Lincoln Electric factory trained personnel.Unauthorized repairs performed on this equipment may result in danger to the technician ormachine operator and will invalidate your factory warranty. For your safety and to avoidelectrical shock, please observe all safety notes and precautions detailed throughout thismanual.
If for any reason you do not understand the test procedures or are unable to perform thetest/repairs safely, contact the Lincoln Electric Service Department for electricaltroubleshooting assistance before you proceed. Call 1-800-833-9353 (WELD).
DESCRIPTION
The following procedure will aid the technician in removing the snubber board for mainte-nance or replacement.
MATERIALS NEEDED
5/16” Nut Driver
7/16 Socket or Nut Driver
F-75 F-75
V350-PRO
WARNING
This procedure takes approximately 15 minutes to perform.
TROUBLESHOOTING & REPAIR
PROCEDURE
1. Remove input power to the V350-PRO.
2. Using a 5/16” nut driver remove the case wrap-around cover.
3. Perform the Input Filter Capacitor DischargeProcedure detailed earlier in this section.
4. Locate the snubber board.. See Figure F.32.
5. Remove small lead #B1 from the board. SeeFigure F.33.
6. Remove the four bolts using a 7/16” socket. Twoof these bolts have leads #30 and #10 connectedto them. Note the position of all leads and associ-ated washers upon removal.
7. Carefully remove the snubber board.
8. Replace the snubber board.
9. Replace the bolts, leads, and washers previouslyremoved. Torque bolt to 30-40 Inch Lbs.
10. Replace the case wraparound cover.
TROUBLESHOOTING & REPAIRF-76 F-76
V350-PRO
SNUBBER BOARD REMOVAL AND REPLACEMENT (continued)
LEFT SIDE
Snubber Board
FIGURE F.32 – SNUBBER BOARD LOCATION
Lead B1
Lead 30
Lead 10
FIGURE F.33 – SNUBBER BOARD LEADS (CLOSE UP)
POWER BOARD REMOVAL AND REPLACEMENT
Service and repair should be performed by only Lincoln Electric factory trained personnel.Unauthorized repairs performed on this equipment may result in danger to the technician ormachine operator and will invalidate your factory warranty. For your safety and to avoidelectrical shock, please observe all safety notes and precautions detailed throughout thismanual.
If for any reason you do not understand the test procedures or are unable to perform thetest/repairs safely, contact the Lincoln Electric Service Department for electricaltroubleshooting assistance before you proceed. Call 1-800-833-9353 (WELD).
DESCRIPTION
The following procedure will aid the technician in removing the power board for maintenanceor replacement.
MATERIALS NEEDED
5/16” Nut Driver
Flathead Screwdriver
WARNING
F-77 F-77
V350-PRO
TROUBLESHOOTING & REPAIR
This procedure takes approximately 20 minutes to perform.
PROCEDURE
1. Remove input power to the V350-PRO.
2. Using a 5/16” nut driver remove the case wrap-around cover.
3. Perform the Input Filter Capacitor DischargeProcedure detailed earlier in this section.
4. Locate the power board. See Figure F.34.
TROUBLESHOOTING & REPAIRF-78 F-78
V350-PRO
POWER BOARD REMOVAL AND REPLACEMENT (continued)
LEFT SIDE
POWER BOARD
FIGURE F.34 POWER BOARD LOCATION
5. Locate the three plug connections. J41, J42 andJ43. See figure F.35.
6. Carefully remove the three plugs from the powerboard.
7. Remove the four screws and associated washersat the corners of the board using a flathead screw-driver. Board is ready for removal. Note the posi-tion of washers upon removal.
8. Remove the power board.
9. Replace with new power board.
10. Secure the new power board into its proper posi-tion with the four screws and washers previouslyremoved.
11. Replace the three plugs previously removed.Plugs J41, J42 and J43.
12. Replace the case wraparound cover.
TROUBLESHOOTING & REPAIRPOWER BOARD REMOVAL AND REPLACEMENT (continued)
F-79 F-79
V350-PRO
J42
J41
J43
FIGURE F.35 – POWER BOARD LEAD LOCATION
NOTESF-80 F-80
V350-PRO
TROUBLESHOOTING & REPAIRF-81 F-81
V350-PRO
INPUT RECTIFIER REMOVAL AND REPLACEMENT
Service and repair should be performed by only Lincoln Electric factory trained personnel.Unauthorized repairs performed on this equipment may result in danger to the technician ormachine operator and will invalidate your factory warranty. For your safety and to avoidelectrical shock, please observe all safety notes and precautions detailed throughout thismanual.
If for any reason you do not understand the test procedures or are unable to perform thetest/repairs safely, contact the Lincoln Electric Service Department for electricaltroubleshooting assistance before you proceed. Call 1-800-833-9353 (WELD).
DESCRIPTION
The following procedure will aid the technician in removing the input rectifier for maintenanceor replacement.
MATERIALS NEEDED
3/16” Allen wrench
5/16” Nut Driver
Flathead Screwdriver
Penetrox A-13 Heatsink Compound
Silicon Sealant
WARNING
This procedure takes approximately 20 minutes to perform.
PROCEDURE
1. Remove input power to the V350-PRO.
2. Using a 5/16” nut driver remove the case wraparound cover.
3. Perform the Input Filter Capacitor DischargeProcedure detailed earlier in this section.
6. Remove the six screws from the terminals using aflathead screwdriver. Carefully note the position ofall leads and their positions upon removal. SeeFigure F.37.
7. Using a 3/16”in. allen wrench remove the twomounting screws and washers from the inputbridge. See Figure F.37.
8. Remove the input bridge.
TROUBLESHOOTING & REPAIRINPUT RECTIFIER REMOVAL AND REPLACEMENT (continued)
F-82 F-82
V350-PRO
WARNING
REMOTE
POWER
OFF
ON
A A
MP
S
A
V V
OLTS
WELD TERMINALS
SELECT
OU
TPU
TLINCOLNELECTRIC
INVERTEC V350-PRO
INPUT RECTIFIER
FIGURE F.36 – INPUT RECTIFIER LOCATION
9. Apply a thin coat of Penetrox A-13 heatsink com-pound to the point of contact between the inputrectifier and the mounting surface.
10. Secure the new input bridge into its proper posi-tion with the two 3/16”in. allen mounting screwspreviously removed. Torque to 44 inch pounds.
11. Reconnect the previously removed leads to theirproper locations. Torque to 31 inch pounds.
12. Cover the input rectifier and its six terminals withsilicon sealant.
13. Replace the case wraparound cover.
TROUBLESHOOTING & REPAIRINPUT RECTIFIER REMOVAL AND REPLACEMENT (continued)
F-83 F-83
V350-PRO
#207A
#207
#209A
B
C
3/16" ALLEN BOLTS
FRONT REAR
Small Lead "A"
To Circuit Breaker
Small Lead "H1"
To Auxiliary Transformer
FIGURE F.37 – INPUT RECTIFIER (CLOSE-UP)
NOTESF-84 F-84
V350-PRO
F-85 F-85
V350-PRO
TROUBLESHOOTING & REPAIROUTPUT RECTIFIER MODULES REMOVAL AND
REPLACEMENT
Service and repair should be performed by only Lincoln Electric factory trained personnel.Unauthorized repairs performed on this equipment may result in danger to the technician ormachine operator and will invalidate your factory warranty. For your safety and to avoidelectrical shock, please observe all safety notes and precautions detailed throughout thismanual.
If for any reason you do not understand the test procedures or are unable to perform thetest/repairs safely, contact the Lincoln Electric Service Department for electricaltroubleshooting assistance before you proceed. Call 1-800-833-9353 (WELD).
DESCRIPTION
The following procedure will aid the technician in removing the output rectifier modules formaintenance or replacement.
MATERIALS NEEDED
3/16” Allen wrench
9/64” Allen wrench
5/16” Nut Driver
7/16” Wrench
Flathead Screwdriver
Penetrox A-13 Heatsink Compound
Thin Knife/Screwdriver
WARNING
This procedure takes approximately 30 minutes to perform.
PROCEDURE
1. Remove input power to the V350-PRO.
2. Using a 5/16” nut driver remove the case wrap-around cover.
3. Perform the Input Filter Capacitor DischargeProcedure detailed earlier in this section.
4. Locate the output rectifier modules located behindthe snubber board. See figure F.38.
5. Before the output rectifier modules can bereached, the Snubber Board RemovalProcedure must be performed.
6. After the snubber board is removed, remove thefour leads connected to the modules using a 3/16”allen wrench. These leads are #X4, #X2, #20, #40.Note their positions for reassembly. See FigureF.38.
7. Remove the copper plates from the tops of themodules.
TROUBLESHOOTING & REPAIROUTPUT RECTIFIER MODULES
REMOVAL AND REPLACEMENT (continued)
F-86 F-86
V350-PRO
LEFT SIDE
Lead #40
Lead #X4
Lead #X2Lead #20
Snubber Board
FIGURE F.38 – OUTPUT RECTIFIER MODULE LEAD LOCATIONS
8. Under the copper plate previously removed, thereis an allen bolt. Remove it using a 9/64” allenwrench.
9. Using a 7/16” socket remove the mounting bolts atthe top and bottom of the modules. See FigureF.39.
10. The output rectifier modules are ready for removaland/or replacement.
11. Before replacing the diode module, apply a thineven coat of Penetrox A-13 heatsink compoundto the bottom surface of the diode module. Note:Keep the compound away from the mountingholes.
12. Press the module firmly against the sink whilealigning the mounting holes. Insert each outerscrew through a spring washer and then a plainwasher and into the holes. Start threading allthree screws into the heat sink (2 or 3 turns byhand).
13. The screw threads may catch on the threads ofthe heat sink, so be sure to get the face of thescrew into contact with the surface of the module(using just hand torque).
14. Using a 7/16” socket, tighten each mounting boltto between 5 and 10 inch pounds.
15 Tighten the center allen screw to between 12 and18 inch pounds.
16. Tighten each mounting bolt again (30 to 40 inchpounds this time).
15. Replace leads #X2, #X4, #20, #40 to their originalterminals in their proper positions. Torque bolts to30-40 Inch Pounds.
16. Perform the Snubber Board ReplacementProcedure detailed earlier in this section.
TROUBLESHOOTING & REPAIRCURRENT TRANSDUCER REMOVAL AND REPLACEMENT
Service and repair should be performed by only Lincoln Electric factory trained personnel.Unauthorized repairs performed on this equipment may result in danger to the technician ormachine operator and will invalidate your factory warranty. For your safety and to avoidelectrical shock, please observe all safety notes and precautions detailed throughout thismanual.
If for any reason you do not understand the test procedures or are unable to perform thetest/repairs safely, contact the Lincoln Electric Service Department for electricaltroubleshooting assistance before you proceed. Call 1-800-833-9353 (WELD).
DESCRIPTION
The following procedure will aid the technician in removing the current transducer for maintenance or replacement.
MATERIALS NEEDED5/16” Nut Driver
1/4” Nut Driver
1/2” Wrench
3/8” Wrench
Channel Locks
Flathead Screwdriver
Phillips Head Screwdriver
Hammer
Crescent Wrench
Pliers
WARNING
This procedure takes approximately 45 minutes to perform.
PROCEDURE
1. Remove input power to the V350-PRO.
2. Using a 5/16” nut driver remove the case wrap-around cover.
3. Perform the Input Filter Capacitor DischargeProcedure detailed earlier in this section.
4. Remove the caps on the two wire feeder recepta-cles.
5. Using a phillips head screwdriver remove the twomounting screws from each wire feeder recepta-cle. See Figure F.40.
6. Using a 5/16” nut driver remove the four screwsfrom the top and bottom of the back of themachine. See Figure F.40.
TROUBLESHOOTING & REPAIRCURRENT TRANSDUCER REMOVAL AND REPLACEMENT (continued)
F-90 F-90
V350-PRO
OFF OFF OFF
OFF
Wire Feeder Receptacle Mounting Screws
Plastic Nut
5/16" Mounting Screws
REAR
FIGURE F.40 – CASE BACK SCREW LOCATIONS
7. Label and remove the four leads connected to thetwo wire feeder circuit breakers. Pliers may benecessary.
8. Label and remove the two leads connecting to theCB2 circuit breaker. Pliers may be necessary.
9. Label and remove the seven leads from the reconnect panel. Pliers may be necessary.
10. Using a crescent wrench, remove the large plasticnut from around the input power line located atbottom of the rear assembly. See Figure F.41.
11. Locate the steel nut located directly on the otherside of the rear assembly behind the plastic nutthat was previously removed. See Figure F.41.
12. Using a hammer and a flathead screwdriver, firm-ly tap the metal nut from the bottom of one of itsribs. This tapping will loosen the nut. Note: Besure to tap from the bottom so the nut loosens ina counter clockwise fashion if viewed from thefront of the machine.
13. Using a 3/8” wrench label and remove leads #202,#203, #206, #207A from the reconnect switches.See Figure F.41.
TROUBLESHOOTING & REPAIRCURRENT TRANSDUCER REMOVAL AND REPLACEMENT (continued)
F-91 F-91
V350-PRO
WARNING
REMOTE
POWER
OFF
ON
A A
MP
S
A
V V
OLTS
WELD TERMINALS
SELECT
OU
TPU
TLINCOLNELECTRIC
INVERTEC V350-PRO
Metal Nut
Plastic Nut
#203#207A
#206#202
FIGURE F.41 LEAD LOCATIONS
14. The back of the machine may now gently bepulled away to gain access to the current trans-ducer. Note: The rear of the machine cannot beremoved completely.
15. Carefully swing the rear of the machine open tothe right while facing the rear of the machine.
16. Perform the Snubber Board RemovalProcedure.
17. Remove leads #X2 and #20 from the output diodemodule.
18. Remove leads #X4 and #40 from the other outputdiode module.
19. Using a 3/8” wrench, remove the four mountingscrews from the output diode heatsink assembly.Take note placement of insulation for reassembly.See Figure F.42.
20. Cut any necessary cable ties and carefully removethe heavy lead from the diode heatsink.
21. Remove the output diode heatsink assemblythrough the rear of the machine.
22. Remove plug #J90 from the current transducer.
23. Using a 3/8” nut driver, remove the two mountingnuts from the current transducer.
TROUBLESHOOTING & REPAIRCURRENT TRANSDUCER REMOVAL AND REPLACEMENT (continued)
25. Replace the two 3/8” mounting nuts previouslyremoved.
26. Reconnect plug #J90 to the current transducer.
27. Replace any necessary cable ties previously cut.
28. Replace the output diode heatsink assembly pre-viously removed using a 3/8” wrench.
Note: Be sure to place insulation in its originallocation.
29. Replace leads #X2, #20, #X4, #40 previouslyremoved from the two output diode modules.Torque to 30-40 inch lbs.
30. Perform the Snubber Board ReplacementProcedure.
31. From the rear of the machine, replace the heavyflex lead to the bottom of the output diodeheatsink assembly using a 1/2” wrench. Note:Don’t forget to include all washers.
32. The rear of the machine may now be placed backinto its original position.
33. Using a 3/8” wrench, replace leads #202, #203,#206, and #207A previously removed from thereconnect switches.
34. Tighten the metal nut previously removed from theinside of the rear wall on the back of the machine.Channel locks may be necessary.
35. Replace the large plastic nut from around inputpower line located at the back of the machine.
36. Replace the seven leads to the reconnect panel intheir proper locations.
37. Replace the two leads to the CB2 circuit breaker.
38. Replace the four leads to the two wire feeder cir-cuit breakers.
39. Using a 5/16” nut driver, replace the four screwsat the top and bottom at the rear of the machine.
40. Replace the two phillips head mounting screwsfrom around each wire feeder receptacle.
41. Replace the case wraparound cover.
TROUBLESHOOTING & REPAIRCURRENT TRANSDUCER REMOVAL AND REPLACEMENT (continued)
F-93 F-93
V350-PRO
TROUBLESHOOTING AND REPAIRRETEST AFTER REPAIR
F-94 F-94
V350-PRO
Retest a machine:
If it is rejected under test for any reason that requires you to remove any part which could affect themachine’s electrical characteristics.
If you repair or replace any electrical components:
IDLE AMPS
Input Volts
230VAC
460VAC
575VAC
Maximum Idle Amps
Less Than 1.0 Amp
Less Than 0.5 Amp
Less Than 0.5 Amp
Idle Watts
400 Watts
400 Watts
400 Watts
Note: The machine’s output terminals should be energized but with no external load on themachine.
PERFORM THE VOLTAGE AND CURRENT CALIBRATION PROCEDUREThis procedure is necessary to insure that the machine is capable of producing output and that the unit is
calibrated correctly.
FAN AS NEEDED (F.A.N.)The fan should turn on when the machine’s output terminals are energized and stay on for approximately
5 minutes after the output terminals are de-energized.
2. FOR MACHINES NOT SUPPLIED WITH INPUT CABLE FOR SINGLE PHASE INPUT: GROUND MACHINE PER NATIONAL AND LOCAL ELECTRICAL CODES. CONNECT TERMINALS U & W TO SUPPLY CIRCUIT. FOR THREE PHASE INPUT: GROUND MACHINE PER NATIONAL AND LOCAL ELECTRICAL CODES. CONNECT TERMINALS U, V & W TO SUPPLY CIRCUIT.
H3
H2
RECONNECT
H5
H4
NOTES: N.A. 1. FOR MACHINES SUPPLIED WITH INPUT CABLE
FOR SINGLE PHASE INPUT: CONNECT GREEN LEAD TO GROUND PER NATIONAL ELECTRICAL CODE. CONNECT BLACK AND WHITE LEADS TO SUPPLY CIRCUIT. WRAP RED LEAD WITH TAPE TO PROVIDE 600V. INSULATION. FOR THREE PHASE INPUT: CONNECT GREEN LEAD TO GROUND PER NATIONAL ELECTRIC CODE. CONNECT BLACK, RED & WHITE LEADS TO SUPPLY CIRCUIT.
FAN
X10
X3
X20
X2
3
2
6
N.C. PLACE "A" LEAD ON APPROPRIATE CONNECTION FOR INPUT VOLTAGE. CONNECTION SHOWN IS FOR 550-575V OPERATION.
A
LEFT SIDE OF MACHINE
204
AA
208
B
G3707
WIRING DIAGRAM INVERTEC V350-PRO
REA
R O
F M
ACH
INE
X30
X40X4
X1
6-2-2000A
SEC
BOOST
RIGHT SIDE OF MACHINE
7
N.B. SINCE COMPONENTS OR CIRCUITRY OF A PRINTED CIRCUIT BOARD MAY CHANGE WITHOUT AFFECTING THE INTERCHANGEABILITY OF A COMPLETE BOARD, THIS DIAGRAM MAY NOT SHOW THE EXACT COMPONENTS OR CIRCUITRY HAVING A COMMON CODE NUMBER.
206
( 380-575VAC POSITION )
207A 276
277
275
STATUS
R510K/2W
POTCONTROL
277
275
1 3
2 4
DISPLAY
5 10
1 6
4 9
83
2 7
MODE
CONTROL
276
R
B A
GW
CB1
WV
C
BU
2
3
4
1
1
5
J4 J3
J5
J6
J7
J8
J9
J10A J10B
403
402
401
40840
5
410
411
412
407
7
23
89
46 1
10
5
1112
2
3
4
1
502503
_
+
10201002
H1
B
TP1TP3
A
A
TP2
C
205
206 203
208
+
201204
202 2073200/300
C2,C4
xxxxxxx
209
SWITCH
207
209
207A
203
202
H6575V550-
460V440-
230V220-
380-415V 208V
200-
H5
H6H2
H3
H4
AUXILIARY
H1
XFMR
7
2
3
8
9
4
6
1
5
10
11
12
13
14
15
16
609602611
607
901
903
804
903
72
3 8
94
61
105
2
234 15
78910
2
3
1
6
5
4
7
8
802806801
Y = YELLOW
W = WHITE
N = BROWNU = BLUE
R = REDG = GREENB = BLACK
COLOR CODE:
7
3 8
94
61
105
BRIDGEINPUT
2A
_+
A
BE
F C
D
_
901
ELECTRICAL SYMBOLS PER E1537
PRIMARY
PRI-IN
PRI-OUT
PRI-OUT
PRI-I N
SEC
BOOST
OUTPUTRECTIFIER
CURRENTTRANSDUCER
502
505
L2REACTOR
CHOKE
REACTORL1
INPUTPERN.A.
}
406
612
608
J34
J31
J311 J37
J2
J1
EF
A BC
D
802
804
801
806
4 3 2 1
+
(REAR VIEW)
2A
4A
32
76A
21
REMOTE
1 7
4 10
93
2 8
J335 10
1 6
4 9
83
2 7
J3317
42V
541
2424
V
16
42
COM
1
77
4A
75
46 12
115
551
553552
554
115V
P56P52
5
4 27577 76
21
903A
901A
554 553+
TP4
TP5
405
407
66
654
13
2
12
11
10
9
8
7
6
5
1
4
3
2
406
401402
403
6
5
4 1
3
2
408410
412
411
J43
J41
J42
POWER
GASSOLENOID
115V WIRE FEEDERREMOTE
16
15715
716
615
616
615607
611612
3200/300
C1,C3+
CONTROLRECTIFIER
54
65
2400/80
+
C5
41A
~
~
66
- +
6 PINREMOTE
(REAR VIEW )
610605
41A
6
100 A CIRCUITBREAKER
FLEX CIRCUITFLEX CIRCUITFLEX CIRCUITFLEX CIRCUIT
N.C.
(REAR VIEW )
1
31532
11
77A
GND31
75A
77B
2B
4B
76B
AB
C
JK
LD
EM
IH
GF
N
J213
1
J201
2
3
6
5
4
2608
I
605
616
610
X10
X30
66B 65B
J90
901B
903B
R1S1
2
16
12
CONNECTOR CAVITY NUMBERING SEQUENCE(VIEWED FROM COMPONENT SIDE OF BOARD)
J43, J3311
7
J8,J20,J21
4
8
1
5
J9, J42, P533
6
1
4
J2,J5,J11,J22, J41,J311, P55
21
43
J31,J33,J34,J37
6
5
10
1J1,J6,J7, P52
8
16
1
9
CB2
SNUBBER
X10
X2X4
X20X40
X30
75B
54
1
28V
432438431432
438
431CB2532
32 P55
2
1 551552
4
3
21B
2
7676A 77A
2A
75A
1
2 2
10101001
6
BASECASE FRONT
PROTECTIVE BONDING CIRCUIT
MODE PANEL
TP6
GND42
75B
77B
2B
4B
21B
76B
AB
C
JK
LD
EM
IH
GF
N41
24CB1
541
41 41B
41B
24/42V WIRE FEEDERREMOTE
J11
715716
7
8
6
5
10201010
10011002
FAN
4
1 2
3
FAN
J22
CO
M2
115V
FAN
6A 2A
COM
2
1001,1002,1010,1020
21,21B,2A,4A,75A,76A,77A
SNB
6
7
8 4609602
503
xxxxxxx
506
505 506
J10A,J10B
COM2A
G-2
NOTE: This diagram is for reference only. It may not be accurate for all machines covered by this manual. The wiring diagram specific to your code is pasted inside one of the enclosure panels of your machine.
ELECTRICAL DIAGRAMS G-3
V350-PRO
SCHEMATIC - COMPLETE MACHINE
SPIPOWERSUPPLY
J31-
10J3
1-9
J31-
8
J31-
1J3
1-2
J31-
7J3
1-6
J31-
5J3
1-4
J31-
3
J31-
9J3
1-8
J31-
1J3
1-2
J31-
7J3
1-6
J31-
5J3
1-4
J31-
3
GREEN L3G
GND
POWERBOARD
(+)15 VOLT SPI
GROUND SPI
MOSI
SCK
(+)5 VOLT SPI
MISO
CS3CS2
CS1
/SS
FAN
FAN
115B
COM2
A
H1C
B
ABLACK
RED
WHITE
SNB
B1X10X40
X30X20
66
65
66B
65B
41A
54
431438
406
405
403
402
401
PULSE TRANSFORMER GATE DRIVE
PRIMARY CURRENT SENSE #2 (+)
VOLTAGE / FREQUENCY CONVERTER #2 (-)VOLTAGE / FREQUENCY CONVERTER #2 (+)
PRIMARY CURRENT SENSE #2 (-)
J6-15
801802804806
PRIMARY CURRENT SENSE #1 (+)
VOLTAGE / FREQUENCY CONVERTER #1 (-)VOLTAGE / FREQUENCY CONVERTER #1 (+)
609
602
616
608
10011002
505
502
505
506
503506
xxxxxxx
power down signal J42-4
J4-1
J4-2
J4-3
GND SPI (b)
+15V SPI (b)
+5V SPI (b)
J10A-2J10A-1J6-8J6-16J6-2
60960261660810011002
PRIMARY CURRENT SENSE #1 (-)
+15VMAIN RELAY CONTROL
J6-9
I OUT
-15VGND
+15V
J90-4
J90-3
J90-2J90-1
MAI
N T
RAN
SFO
RM
ER
J21-2
high
= s
ofts
tart
off
SOFT
STA
RT
J20-
3
J20-
7
(+)(-) PULS
ETR
ANSF
ORM
ERJ2
0-5
J20-
1FAN
PO
WER
FAN
CO
NTR
OL
J20-
6
J20-
2
CR1
J20-8
J20-4
J21-3
J21-7
J21-6
FAN
J22-
3
J22-
2J2
2-1
J22-
4
J43-9
J43-4J43-12
J43-6
GND (d)
+20 (d)
+
GAS SOLENOID(option)
553
554
552551
P55-4P55-3P55-2P55-1 SUPPLY
POWERCHOPPER
438
432
431
GND (c)
+20 (c)
J43-1J43-7
J43-2
J43-8
21BS1
R1
903B
901B901A
903A21
2A
532
32
6A41
541
CB1
6 Pin Ampehnol
(front of machine)
RS232supply
+5 RS232 (e)
GND (e)
+5 SPI (b)
+15 SPI (b)
SPI GND (b)
SUPPLYPOWER
CONTROLMACHINE
J43-1
GND (a)-15 (a)
+5 (a)+15 (a)
J42-2
J42-5
J42-3
J42-1
J45-1
J45-2
REMOTE BOARD
GRO
UND
SPI
MO
SISC
K
NO
CO
NNE
CTI
ON
MIS
OCS
3C
S2 CS1
SNUBBERBOARD
REACTOR
REACTOR
INPUTLINES
GRO
UND
SPI
MO
SISC
K
NO
CO
NNEC
TIO
N(+
)5 V
OLT
SPI
MIS
OCS
3C
S2C
S1 /SS
+ 5
VOLT
SPI
CV - FLUX CORE
TIG GTAW
CC - STICK 7018
MODE SELECT PANEL
LOCA
L C
ON
TRO
L
LOCA
L C
ON
TRO
L
DISPLAY PANEL
J311
-2
276
J311
-3N
O C
ONN
ECTI
ON
J311
-4
277
J311
-1LO
CAL
CO
NTR
OL
275
J31-
10
GRO
UND
SPI
J31-
9
MO
SI
J31-
8
SCK
J31-
1
NO
CO
NNEC
TIO
N
J31-
2
(+)5
VO
LT S
PI
J31-
7
MIS
O
J31-
6C
S3J3
1-5
CS2
J31-
4
CS1
STATUS PANEL
J31-
3
/SS
J7-15 + 15 (a)
S
X3
X2X1
X4
S
BK-IN
FR-IN
S
23
SB-
I NS
A-O
UT6
7SA-
IN
SB-
OU
T
100 AMPCIRCUIT BREAKER
/ INPUT SWITCH
TP3 TP2
TP1
AC3
AC1L3
V
W L1
L2 AC2
POS
NEGU
J21-1
J21-5
J21-8
J21-4
Shown connected for200 - 240 Volt Input Voltage
RECONNECT SWITCH
CR1MAININPUTRELAY
V/F CONVERTER # 1
V/F CONVERTER # 2
SWITCH BOARD
+
-
202
208
+
-
+
J4-5
J4-6
J4-11
J4-10
J4-8
J4-12
J5-2
J5-3
J4-7
J7-16
J6-5
J6-11
J6-7
J6-12
J10B-2J10B-1J6-10
J3-10
J3-9
J3-8
J3-7
J3-6J3-5
J3-4J3-3J3-2J3-1
J9-3J9-1
J8-6J8-4J8-2
-
203
207
201
204
xxxxxxx
206
209
205
MAIN CHOKE
THERMOSTAT
CC - STICK 6010
CV - WIRE
ARCCONTROL
VOLTSON
WELDTERMINALS
ON / OFF
THER
MAL
POWERDOWN SIGNAL (HIGH=RUN)
801802804806
901903
6101010
503
502
GND (a)
GND (e)
TRANSDUCERCURRENT
FAN CONTROL
GND (a)
PULSE TRANSFORMER GATE DRIVESOFT START CONTROL
CONTROL BOARD COMMON
THERMOSTAT
THERMOSTAT
407412
716
605
715
611
607615612
1020
(+) STUD VOLTAGE SENSE(-) STUD VOLTAGE SENSE
+5V RS232 (e)
+5V (a)
411
410
408
ONLY. ALL COMPONENTS ARE NOT SHOWN. N.A. PC BOARD COMPONENTS SHOWN FOR REFERENCE
NOTES :
-15V+15VCURRENT FEEDBACK ( 4V=500A )
TP3
C2/TP2
C1/TP1
J8-1
160J320V
600V.05uF
80J150V
160J320V
600V.05uF
CONTROL BOARD
+15V (a)
-15V (a)
POSITIVE
-NEGATIVE
+
C
D
E
B
FA
CO
M2
115B
J52-
542
J56-
1J5
2-7
24
CO
M2A
31
CO
M1
J56-
641
AC
OM
1AJ5
2-16
541
J52-
11
115A
J52-
153
2
(440
-460
)H
5
(550
-575
)H
6
24V
28V
42V
(380
-415
)(2
20-2
30)
(200
-208
)
H4
H3H2H1
2A
TRANSFORMER
AUXILIARY
AMPHENOLS VIEWED FROM FRONT (OUTSIDE OF MACHINE)
7776
75
24
42
AMPS
HOTSTART
REMOTE
LOCAL
REMOTELOCAL /REMOTECONTROL
MODE SELECT
4200 uF
4200 uF
+40 VDC
250
Ohm
s
115 VAC
FLEXCIRCUIT
406
405
403
402
401
407412
411
410
408
FLEXCIRCUIT
FLEXCIRCUITFLEX
CIRCUIT
J31-
10
/SS
LOCAL CONTROL
J31-
9J3
1-8
J31-
1J3
1-2
J31-
7J3
1-6
J31-
5J3
1-4
J31-
3
GR
OUN
D S
PIM
OSI
SCK
NO
CO
NNEC
TIO
N
MIS
OCS
3
CS1
+ 5
VOLT
SPI
J31-
10
/SSJ3
31-1
2J3
31-1
1J3
31-1
0J3
31-9
J331
-8
J331
-1J3
31-2
J331
-7J3
31-6
J331
-5J3
31-4
J331
-3
graphical representation
SOLE
NO
ID C
OIL
(+)
SOLE
NO
ID S
UPP
LY (+
)
NO
CO
NNEC
TIO
N
6 PI
N'S
"4" L
EAD
"77"
LEA
D14
PIN
'S "7
6" L
EAD
SOLE
NO
ID S
UPPL
Y (-)
"2" L
EAD
14 P
IN'S
"4" L
EAD
SOLE
NO
ID C
OIL
(-)
"75"
LEA
D6
PIN
'S "7
6" L
EAD
+10 Volts
of potentiometer connection
610
1010
716
605
715
611607 615 612
1020
OUTPUTDIODES
+
-4200 uF
4200 uF
54
(+) (-)
24 / 42 Volt Amphenol(top amphenol onback of machine)
115 Volt Amphenol(bottom amphenol
on back of machine)
CD
E
BL
MF
KN
G
JI
H
A
2A
21
4A
CD
E
BL
MF
KN
G
JI
H
A
41
76B77B2B4B
75B2421B
41B
41B
31
32
75B
77A
2B
75A
76A
4B
CS2
ELECTRICAL SYMBOLS PER E1537
6
12
CONNECTOR CAVITY NUMBERING SEQUENCE(VIEWED FROM COMPONENT SIDE OF BOARD)
J43, J3311
7
J8,J20, J214
8
1
5
J9,J42,P533
6
1
4
J2,J5,J11,J22,J41,J311,P55
21
43
J31,J33,J34,J37
6
5
10
1
J1,J6,J7, P52
8
16
1
9
J10A,J10B
2
1
Dashed lines representcopper bus connections.
SPIPOWERSUPPLY
J31-
10J3
1-9
J31-
8
J31-
1J3
1-2
J31-
7J3
1-6
J31-
5J3
1-4
J31-
3
J31-
9J3
1-8
J31-
1J3
1-2
J31-
7J3
1-6
J31-
5J3
1-4
J31-
3
GREEN L3G
GND
POWERBOARD
(+)15 VOLT SPI
GROUND SPI
MOSI
SCK
(+)5 VOLT SPI
MISO
CS3CS2
CS1
/SS
FAN
FAN
115B
COM2
A
H1C
B
ABLACK
RED
WHITE
SNB
B1X10X40
X30X20
66
65
66B
65B
41A
54
431438
406
405
403
402
401
PULSE TRANSFORMER GATE DRIVE
PRIMARY CURRENT SENSE #2 (+)
VOLTAGE / FREQUENCY CONVERTER #2 (-)VOLTAGE / FREQUENCY CONVERTER #2 (+)
PRIMARY CURRENT SENSE #2 (-)
J6-15
801802804806
PRIMARY CURRENT SENSE #1 (+)
VOLTAGE / FREQUENCY CONVERTER #1 (-)VOLTAGE / FREQUENCY CONVERTER #1 (+)
609
602
616
608
10011002
505
502
505
506
503506
xxxxxxx
power down signal J42-4
J4-1
J4-2
J4-3
GND SPI (b)
+15V SPI (b)
+5V SPI (b)
J10A-2J10A-1J6-8J6-16J6-2
60960261660810011002
PRIMARY CURRENT SENSE #1 (-)
+15VMAIN RELAY CONTROL
J6-9
I OUT
-15VGND
+15V
J90-4
J90-3
J90-2J90-1
MAI
N T
RAN
SFO
RM
ER
J21-2
high
= s
ofts
tart
off
SOFT
STA
RT
J20-
3
J20-
7
(+)(-) PULS
ETR
ANSF
ORM
ERJ2
0-5
J20-
1FAN
PO
WER
FAN
CO
NTR
OL
J20-
6
J20-
2
CR1
J20-8
J20-4
J21-3
J21-7
J21-6
FAN
J22-
3
J22-
2J2
2-1
J22-
4
J43-9
J43-4J43-12
J43-6
GND (d)
+20 (d)
+
GAS SOLENOID(option)
553
554
552551
P55-4P55-3P55-2P55-1 SUPPLY
POWERCHOPPER
438
432
431
GND (c)
+20 (c)
J43-1J43-7
J43-2
J43-8
21BS1
R1
903B
901B901A
903A21
2A
532
32
6A41
541
CB1
6 Pin Ampehnol
(front of machine)
RS232supply
+5 RS232 (e)
GND (e)
+5 SPI (b)
+15 SPI (b)
SPI GND (b)
SUPPLYPOWER
CONTROLMACHINE
J43-1
GND (a)-15 (a)
+5 (a)+15 (a)
J42-2
J42-5
J42-3
J42-1
J45-1
J45-2
REMOTE BOARD
GRO
UND
SPI
MO
SISC
K
NO
CO
NNE
CTI
ON
MIS
OCS
3C
S2 CS1
SNUBBERBOARD
REACTOR
REACTOR
INPUTLINES
GRO
UND
SPI
MO
SISC
K
NO
CO
NNEC
TIO
N(+
)5 V
OLT
SPI
MIS
OCS
3C
S2C
S1 /SS
+ 5
VOLT
SPI
CV - FLUX CORE
TIG GTAW
CC - STICK 7018
MODE SELECT PANEL
LOCA
L C
ON
TRO
L
LOCA
L C
ON
TRO
L
DISPLAY PANEL
J311
-2
276
J311
-3N
O C
ONN
ECTI
ON
J311
-4
277
J311
-1LO
CAL
CO
NTR
OL
275
J31-
10
GRO
UND
SPI
J31-
9
MO
SI
J31-
8
SCK
J31-
1
NO
CO
NNEC
TIO
N
J31-
2
(+)5
VO
LT S
PI
J31-
7
MIS
O
J31-
6C
S3J3
1-5
CS2
J31-
4
CS1
STATUS PANEL
J31-
3
/SS
J7-15 + 15 (a)
S
X3
X2X1
X4
S
BK-IN
FR-IN
S
23
SB-
I NS
A-O
UT6
7SA-
IN
SB-
OU
T
100 AMPCIRCUIT BREAKER
/ INPUT SWITCH
TP3 TP2
TP1
AC3
AC1L3
V
W L1
L2 AC2
POS
NEGU
J21-1
J21-5
J21-8
J21-4
Shown connected for200 - 240 Volt Input Voltage
RECONNECT SWITCH
CR1MAININPUTRELAY
V/F CONVERTER # 1
V/F CONVERTER # 2
SWITCH BOARD
+
-
202
208
+
-
+
J4-5
J4-6
J4-11
J4-10
J4-8
J4-12
J5-2
J5-3
J4-7
J7-16
J6-5
J6-11
J6-7
J6-12
J10B-2J10B-1J6-10
J3-10
J3-9
J3-8
J3-7
J3-6J3-5
J3-4J3-3J3-2J3-1
J9-3J9-1
J8-6J8-4J8-2
-
203
207
201
204
xxxxxxx
206
209
205
MAIN CHOKE
THERMOSTAT
CC - STICK 6010
CV - WIRE
ARCCONTROL
VOLTSON
WELDTERMINALS
ON / OFF
THER
MAL
POWERDOWN SIGNAL (HIGH=RUN)
801802804806
901903
6101010
503
502
GND (a)
GND (e)
TRANSDUCERCURRENT
FAN CONTROL
GND (a)
PULSE TRANSFORMER GATE DRIVESOFT START CONTROL
CONTROL BOARD COMMON
THERMOSTAT
THERMOSTAT
407412
716
605
715
611
607615612
1020
(+) STUD VOLTAGE SENSE(-) STUD VOLTAGE SENSE
+5V RS232 (e)
+5V (a)
411
410
408
ONLY. ALL COMPONENTS ARE NOT SHOWN. N.A. PC BOARD COMPONENTS SHOWN FOR REFERENCE
NOTES :
-15V+15VCURRENT FEEDBACK ( 4V=500A )
TP3
C2/TP2
C1/TP1
J8-1
160J320V
600V.05uF
80J150V
160J320V
600V.05uF
CONTROL BOARD
+15V (a)
-15V (a)
POSITIVE
-NEGATIVE
+
C
D
E
B
FA
CO
M2
115B
J52-
542
J56-
1J5
2-7
24
CO
M2A
31
CO
M1
J56-
641
AC
OM
1AJ5
2-16
541
J52-
11
115A
J52-
153
2
(440
-460
)H
5
(550
-575
)H
6
24V
28V
42V
(380
-415
)(2
20-2
30)
(200
-208
)
H4
H3H2H1
2A
TRANSFORMER
AUXILIARY
AMPHENOLS VIEWED FROM FRONT (OUTSIDE OF MACHINE)
7776
75
24
42
AMPS
HOTSTART
REMOTE
LOCAL
REMOTELOCAL /REMOTECONTROL
MODE SELECT
4200 uF
4200 uF
+40 VDC
250
Ohm
s
115 VAC
FLEXCIRCUIT
406
405
403
402
401
407412
411
410
408
FLEXCIRCUIT
FLEXCIRCUITFLEX
CIRCUIT
J31-
10
/SS
LOCAL CONTROL
J31-
9J3
1-8
J31-
1J3
1-2
J31-
7J3
1-6
J31-
5J3
1-4
J31-
3
GR
OUN
D S
PIM
OSI
SCK
NO
CO
NNEC
TIO
N
MIS
OCS
3
CS1
+ 5
VOLT
SPI
J31-
10
/SSJ3
31-1
2J3
31-1
1J3
31-1
0J3
31-9
J331
-8
J331
-1J3
31-2
J331
-7J3
31-6
J331
-5J3
31-4
J331
-3
graphical representation
SOLE
NO
ID C
OIL
(+)
SOLE
NO
ID S
UPP
LY (+
)
NO
CO
NNEC
TIO
N
6 PI
N'S
"4" L
EAD
"77"
LEA
D14
PIN
'S "7
6" L
EAD
SOLE
NO
ID S
UPPL
Y (-)
"2" L
EAD
14 P
IN'S
"4" L
EAD
SOLE
NO
ID C
OIL
(-)
"75"
LEA
D6
PIN
'S "7
6" L
EAD
+10 Volts
of potentiometer connection
610
1010
716
605
715
611607 615 612
1020
OUTPUTDIODES
+
-4200 uF
4200 uF
54
(+) (-)
24 / 42 Volt Amphenol(top amphenol onback of machine)
115 Volt Amphenol(bottom amphenol
on back of machine)
CD
E
BL
MF
KN
G
JI
H
A
2A
21
4A
CD
E
BL
MF
KN
G
JI
H
A
41
76B77B2B4B
75B2421B
41B
41B
31
32
75B
77A
2B
75A
76A
4B
CS2
ELECTRICAL SYMBOLS PER E1537
6
12
CONNECTOR CAVITY NUMBERING SEQUENCE(VIEWED FROM COMPONENT SIDE OF BOARD)
J43, J3311
7
J8,J20, J214
8
1
5
J9,J42,P533
6
1
4
J2,J5,J11,J22,J41,J311,P55
21
43
J31,J33,J34,J37
6
5
10
1
J1,J6,J7, P52
8
16
1
9
J10A,J10B
2
1
Dashed lines representcopper bus connections.
6-2-2000A
G-3
NOTE: This diagram is for reference only. It may not be accurate for all machines covered by this manual.
ELECTRICAL DIAGRAMS G-4
V350-PRO
SCHEMATIC - CONTROL PC BOARD #1
SO
LID
ED
GE
EN-1
70
MANUFACTURING TOLERANCE PER E2056UNLESS OTHERWISE SPECIFIED TOLERANCE
SCALE:DO NOT SCALE THIS DRAWING
ON 3 PLACE DECIMALS IS ±� .002
THIS SHEET CONTAINS PROPRIETARY INFORMATION OWNED BY THE LINCOLN ELECTRIC COMPANY AND IS NOT TO BE REPRODUCED, DISCLOSED OR USED WITHOUT THE EXPRESS WRITTEN PERMISSION OF THE LINCOLN ELECTRIC COMPANY, CLEVELAND, OHIO U.S.A.
DESIGN INFORMATION
t
DRAWN BY:
WITH PUBLISHED STANDARDS.DATE:
ON 2 PLACE DECIMALS IS ±�.02
MATERIAL TOLERANCE (" ") TO AGREEON ALL ANGLES IS ±� .5 OF A DEGREE SUBJECT:
MANUFACTURING TOLERANCE PER E2056UNLESS OTHERWISE SPECIFIED TOLERANCE
SCALE:DO NOT SCALE THIS DRAWING
ON 3 PLACE DECIMALS IS ±� .002
THIS SHEET CONTAINS PROPRIETARY INFORMATION OWNED BY THE LINCOLN ELECTRIC COMPANY AND IS NOT TO BE REPRODUCED, DISCLOSED OR USED WITHOUT THE EXPRESS WRITTEN PERMISSION OF THE LINCOLN ELECTRIC COMPANY, CLEVELAND, OHIO U.S.A.
DESIGN INFORMATION
t
DRAWN BY:
WITH PUBLISHED STANDARDS.DATE:
ON 2 PLACE DECIMALS IS ±�.02
MATERIAL TOLERANCE (" ") TO AGREEON ALL ANGLES IS ±� .5 OF A DEGREE SUBJECT:
ENGINEER:
EQUIPMENT TYPE:
DRAWING No.:T. KOOKEN
F.V.INVERTER WELDERS
DIGITAL CONTROL SCHEMATICGNONE 12-15-99
REFERENCE:
SUPERSEDING:
APPROVED:
Chg. Sheet No."X" INFO.
XM5626
XA
6-2-2000A
3789-1D0/2
G-5
NOTE: This diagram is for reference only. It may not be accurate for all machines covered by this manual.
ELECTRICAL DIAGRAMS G-6
V350-PRO
SCHEMATIC - CONTROL PC BOARD #3
AD_DATA[0:13]
SAWTOOTH GENERATOR
PRIMARY CURRENT SHUTDOWN 0.3 - 0.9A
PRIMARY CURRENT SENSE
IDEAL VOLTAGE2/6/202.6,
70V=0.9V
CURRENT TRANSDUCERSIGNAL IN
4V = 500A OUTPUT
CURRENT TRANSDUCERINPUT = (-VOLTAGE)
CURRENT NODE CONTROL, DISABLE THEFETS AS SOON AS PRIMARY CURRENT
IS GREATER THAN A REFERENCE LEVEL
Iout = -Vin*0.99mA
CURRENT FEEDBACKINTEGRATOR
IDEAL V_AD2.5V = 70 ArcVOLTS
INPUT FROM 2nd LEM
STT CURRENT FLOW
I>56A = HII<56A = LO
ON CONNECTOR3500 VOLTS
1<GAIN<11
A/D CONVERSION
CURRENT LIMIT
SECONDARY CURRENT SENSE
VOLTAGE FEEDBACK
+STUP
67
-STUP
21
AD_DATA12
AD_DATA11
AD_DATA11
AD_DATA10
AD_DATA10
AD_DATA9
AD_DATA9
AD_DATA8
AD_DATA8
AD_DATA7
AD_DATA7
AD_DATA6
AD_DATA6
AD_DATA5
AD_DATA5
I_AD
I_AD
I_AD
I_FLOW_STTAD_DATA4
AD_DATA4
MOSI
SCK
V_AD
V_AD
V_ADAD_DATA0
AD_DATA0
AD_DATA13
AD_CSPOT_CS
MSELEN
MSELEN
AD_DATA1
AD_DATA1
AD_DATA2
AD_DATA2
AD_DATA3
AD_DATA3
MSEL0
MSEL0MSEL1
MSEL1
SEL_I_ON
DA_CS
TURN_OFF_N
A
A
A
A
A D
A
A D
A
AA
D
A
A
A
A
A
DA
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A A
D
D
A
AA
A
A
A
A
D
A
A
A
A D
D
A
A
R2121M
R23047.5K
R252.21K
R113
1.50K
R27
47.5K
R2311.00K
R24
511
R28
47.5K
R23
511
R26
47.5K
R5347.5K
R2210.0K
R61
1.0
0K
R2947.5K
R55100K
R111100K
R110
47.5K
R146
4.75K
R63 33.2K
R66
2.21K
R65 33.2K
R141
475
R674.75K
R62
100
R106
100K
R59
221
R48
221
R49
100K
R108
100K
R102
221
R44
100
R207100K
R118
1.50K
R122
1.50K
R109
2.67K
R13910.0K
R1233.32K
R115
100K
R114 26.7K
R120 26.7K
R112 1.00K
R138
475
R60
1.00k
R119475
R117150K
R561.00K
R5747.5K
R14010.0K
R128
3.32K
R129
3.32K
R1276.81K
R12110.0K
R130
6.81K
R116475
R125
150K
R126
1.00K
R124
100K
R45
221
R15
110
R15
410
R15
710
R16
0
10 R14
810
R16
110
R15
810
R15
510
R15
210
R14
910
R71 1.00K
R70
121K
R74
1.5
0K
R76
1.5
0K
R80
1.5
0K
R78
1.5
0K
R73
100K1/2W_HV
R79
100K1/2W_HV
R75
100K1/2W_HV
R77
100K1/2W_HV
R7226.7K
R54 1.00K
R107
10.0K
R691.00K
R681.00K
R142
100K
R143
1.00K
R144
1.00K
R10310.0K
R58
1.00K
R209 4.75K
R210
4.75K
R2111M
R208100K
R206
1.00K
R23333.2K
R2131.00K
R24110.0K
R214
1.00K
R21610.0K
R21710.0K
R218
10.0K
1J9
3J9
2J9
4J9
5J9
6J9
D101
MURS320T3
D68S1G
D67S1G
D56
MU
RS
320T
3
D55
MU
RS
320T
3
D51
MU
RS
320T
3
D57
MU
RS
320T
3
D75S1G
D64S1G
D65S1G
D70S1G
D99
MURS320T3
D98MURS320T3
D100MURS320T3
C860.022uF
C1250.1uF
C550.1uF
C28
0.1uF
C82 0.1uF
C83 0.1uF
C7
0.022uF
C85
0.1uF
C8
0.1uF
C80
0.1uF
C50
0.1uF
C23
0.1uF
C21
0.1uF
C17
820pF
C51
0.1uF
C19
820pF
C58
0.1uF
C570.1uF
C56
0.27uF
C52
0.1uF
C340.27uF
C32
10pF
C26
150pF
C35
150
pF
C36
150
pF
C38
150
pF
C37
150
pF
C60
0.1uF
C59
0.1uF
C126330pF
C124 0.1uF
C300.1uF
C12
70.
1uF
C12822pF
C1290.1uF
C1400.1uF
DZ31N5358B DZ2
1N5333B
DZ41N5358B
DZ1
1N5333B
D35
1/2W5.1V
MMSZ5231
D361/2W5.1V
MMSZ5231
D381/2W5.1V
MMSZ5231
D37
1/2W5.1V
MMSZ5231
D421/2W
5.1V
MMSZ5231
D41
1/2W5.1V
MMSZ5231
D401/2W5.1V
MMSZ5231
D39
1/2W5.1V
MMSZ5231
D69
1/2W5.1V
MMSZ5231
2J10B
1J10B
2J10A
1J10A
(1)
(1)
(4)
(4)
(4)
(1)
(4)(1)
(4)
(1)
(1)
(1)
(4)(4)
(3)
(1)
(4)
(1)
(4)
E1
V-V+
IN2
GND
VL
S
D
6
1
8
3745
X31
ADG417D1
V-V+
IN2
GND
VL
S
D6
1
8
3745
X13
ADG417D1
OP-27+
-
4
81
7
3
26X1
1TP1
1
TP2
1
TP3
1TP4
1TP5
1TP6
+
-
11
4
10
98 X20
MC33074AD
+
-
11
4
10
9
8X8
MC33074AD
+
-
11
4
3
21X8
MC33074AD
+
-
11
4
12
1314X20
MC33074AD
+
-
11
4
12
1314X8
MC33074AD
+
-
11
4
5
67X8
MC33074AD
+
-
11
4
3
21X20
MC33074AD
+
-
11
4
12
1314X14
MC33074AD
+
-
11
4
5
67X14
MC33074AD
+
-
11
4
10
98X14
MC33074AD
+
-
11
4
3
21X14
MC33074AD
+
-
11
4
5
67X20
12 J7
11 J7
1
2
3Q12
MMBT4401
1
2
3Q18
MMBT4401
9 8X30
74AC14
5 6X30
74AC14
C49
20V22uF
C54
20V22uF
1
3
2
D66BAV99
1
3
2
D50BAV99
132
D33BAV99
1
3
2
D49BAV99
DGNDAGND
IOUT1
RFB
VREF
VDD
CS'WR'D11
D10D9D8D7D6D5D4D3D2D1D0
16174
56789
101112131415
32
1
20
19
18X12
AD7945BRS
+2.5V
-15V
+2.5V
+2.5V
+5VA
+5VA
-5V
-15V
-15V
+15V
+5V
+15V
-15V
+5V
+5VA
+15V
-15V
-15V
+15V
-15V
+15V
-15V
+15V
-15V
+15V
-15V
+15V
-5V
+5VA
AA=5VA
+5VA
+15V
-15V
+15V
-15V
+15V
-15V
+15V
-15V+5VA+5VA
+5VA
+5VA
+15V
+5VA
+5VA
+15V
-15V
+15V
-15V
+5VA+15V
+15V
+15V
+5VA
+5VA
+15V
+15V
-15V
+5VA
+5V
24
22
23X32
AD8403ARU10
2
4
3X32
AD
8403AR
U10
242223
X6
AD8403ARU10
6
8
7
X6
AD8403ARU10
201819
X6AD8403ARU10
2
4
3
X6
AD8403ARU10
LG
V-
V++
-8
7
1
5 64
3
2
X5LT1016
LG
V-
V++
-8
7
1
5 64
3
2
X7LT1016
DGNDAGND4AGND3AGND2AGND1
VDD
SDOSDISHDN'CS'RS'CLK
951712116
131210111514
X6
AD8403ARU10
DGNDAGND4AGND3AGND2AGND1
VDD
SDOSDISHDN'CS'RS'CLK
951712116
131210111514
X32
AD8403ARU10
132
D34BAT54S
132
D54BAT54S
132
D28BAT54S
132
D47BAT54S
ENA1A0
S1ADA
DB
S4BS3BS2BS1B
S4AS3AS2A
V+V-
GND
14315
8
9
10111213
7654
216
1 X15
ADG409
1J8
5J8
7
1
2
8
Q11
IRF7103
5
3
4
6
Q11IRF7103
CS'RD'A0VA1VB1VA2VB2AGND1AGND2DGNDBUSY
DB0DB1DB2DB3DB4DB5DB6DB7DB8DB9
DB10DB11DB12DB13
VDDVREFCONVST'
281234569101112131415
237
1627171826252022218
1924
X19
AD7863ARS-2
PRI_OC
OVR_CUR
RESET_RAMP
CLR_CAP
+2.5V
+2.5V
SYS_RESETSTROBE_AD
VDREF/RES
SO
LID
ED
GE
EN-1
70
MANUFACTURING TOLERANCE PER E2056UNLESS OTHERWISE SPECIFIED TOLERANCE
SCALE:DO NOT SCALE THIS DRAWING
ON 3 PLACE DECIMALS IS ±� .002
THIS SHEET CONTAINS PROPRIETARY INFORMATION OWNED BY THE LINCOLN ELECTRIC COMPANY AND IS NOT TO BE REPRODUCED, DISCLOSED OR USED WITHOUT THE EXPRESS WRITTEN PERMISSION OF THE LINCOLN ELECTRIC COMPANY, CLEVELAND, OHIO U.S.A.
DESIGN INFORMATION
t
DRAWN BY:
WITH PUBLISHED STANDARDS.DATE:
ON 2 PLACE DECIMALS IS ±�.02
MATERIAL TOLERANCE (" ") TO AGREEON ALL ANGLES IS ±� .5 OF A DEGREE SUBJECT:
ENGINEER:
EQUIPMENT TYPE:
DRAWING No.:T. KOOKEN
F.V.INVERTER WELDERS
DIGITAL CONTROL SCHEMATICGNONE 12-15-99
REFERENCE:
SUPERSEDING:
APPROVED:
Chg. Sheet No."X" INFO.
XM5626
XA
6-2-2000A
3789-1D0/3
G-6
NOTE: This diagram is for reference only. It may not be accurate for all machines covered by this manual.
MANUFACTURING TOLERANCE PER E2056UNLESS OTHERWISE SPECIFIED TOLERANCE
SCALE:DO NOT SCALE THIS DRAWING
ON 3 PLACE DECIMALS IS ±� .002
THIS SHEET CONTAINS PROPRIETARY INFORMATION OWNED BY THE LINCOLN ELECTRIC COMPANY AND IS NOT TO BE REPRODUCED, DISCLOSED OR USED WITHOUT THE EXPRESS WRITTEN PERMISSION OF THE LINCOLN ELECTRIC COMPANY, CLEVELAND, OHIO U.S.A.
DESIGN INFORMATION
t
DRAWN BY:
WITH PUBLISHED STANDARDS.DATE:
ON 2 PLACE DECIMALS IS ±�.02
MATERIAL TOLERANCE (" ") TO AGREEON ALL ANGLES IS ±� .5 OF A DEGREE SUBJECT:
ENGINEER:
EQUIPMENT TYPE:
DRAWING No.:T. KOOKEN
F.V.INVERTER WELDERS
DIGITAL CONTROL SCHEMATICGNONE 12-15-99
REFERENCE:
SUPERSEDING:
APPROVED:
Chg. Sheet No."X" INFO.
XM5626
XA
6-2-2000A
3789-1D0/4
G-7
NOTE: This diagram is for reference only. It may not be accurate for all machines covered by this manual.
NOTE: Lincoln Electric assumes no responsibility for liablilities resulting from board level troubleshooting. PC Board repairs will invalidate your factory warranty. Individual Printed Circuit Board Components are not available from Lincoln Electric. This information is pro-vided for reference only. Lincoln Electric discourages board level troubleshooting and repair since it may compromise the quality of the design and may result in danger to the Machine Operator or Technician. Improper PC board repairs could result in damage to themachine.
ELECTRICAL DIAGRAMS G-8
V350-PRO
PC BOARD ASSEMBLY-CONTROL
SO
LID
ED
GE
EN-1
68
MANUFACTURING TOLERANCE PER E2056UNLESS OTHERWISE SPECIFIED TOLERANCE
SCALE:DO NOT SCALE THIS DRAWING
ON 3 PLACE DECIMALS IS ±� .002
THIS SHEET CONTAINS PROPRIETARY INFORMATION OWNED BY THE LINCOLN ELECTRIC COMPANY AND IS NOT TO BE REPRODUCED, DISCLOSED OR USED WITHOUT THE EXPRESS WRITTEN PERMISSION OF THE LINCOLN ELECTRIC COMPANY, CLEVELAND, OHIO U.S.A.
DESIGN INFORMATION
t
DRAWN BY:
WITH PUBLISHED STANDARDS.DATE:
ON 2 PLACE DECIMALS IS ±�.02
MATERIAL TOLERANCE (" ") TO AGREEON ALL ANGLES IS ±� .5 OF A DEGREE SUBJECT:
N.A. CAUTION: THIS DEVICE IS SUBJECT TO DAMAGE BY STATIC ELECTRICITY. LINCOLN ELECTRIC TO SEE E2454 BEFORE HANDLING.N.B. SECURE P.C. BOARD ASSEMBLY IN PLACE WITH (ITEM 3) (2 PLACES).N.C. TOP OF THESE COMPONENTS MUST BE FREE OF POTTING MATERIAL.N.D. IDENTIFY COMPLETE ASSEMBLY WITH A PRINTED LABEL PER E3867.N.E. THERE ARE COMPONENTS ON BOTTOM SIDE OF P.C. BOARD.N.F. PROGRAM ITEM 89 WITH ITEM 6.N.G. PROGRAM ITEM 98 WITH ITEM 7.
N.J. PLACE CONNECTOR KEYING PLUG (ITEM 9) OVER HEADER PIN, IN LOCATION SHOWN. PLUG SHOULD BE INSERTED BELOW CONNECTOR TOP SURFACE.N.K. ALL CONNECTORS MUST BE GREASED WITH (ITEM 5) PRIOR TO ENCAPSULATION.N.L. ENCAPSULATION PER E1911-E TO A MINIMUM DEPTH, SUCH THAT ALL COMPONENT LEADS ARE COVERED.
FOR ITEMS LISTED BELOW REFER TO ELECTRICAL DATABASE FOR COMPONENTSPECIFICATIONS
10
9 9N.J. N.J.
V
G-8
ELECTRICAL DIAGRAMS G-9
V350-PRO
SCHEMATIC - POWER SUPPLY PRINTED CIRCUIT BOARD
.1C53
Vfb2
Vref 1
100K
R29
CNY17-3OCI2
4 2
1
6
5
.5W27VDZ2 VFB
CS
COMPRT/CT
VCC OUT
VREF
GNDX4
2
35
1
6
4
8
7
.5W27VDZ3
Vref 2
15.0
K
R1
4.735V
C3
.022C49
221K
R34
10.0
K
R56
100V
150p
C27
200V1C26
56.2K
R38
gnd_mcps
1.0A30V
D23
T2
12
3
+5V
2000V.0015C31
50V0.1C2
J424
50V0.1C25
1.035V
C23
D10
1.00K
R26
J43
9
D9
4.735V
C24
D25
G
D
S
21A200V
Q2
150pC52
1.0A30V
D20
3W0.05 R
30
1.21K
R37
75K
R31
15.0
R32
3W18VDZ7
OV2
Detect600V1A
30-55 VDC
<30VDC
Undervoltage
1A600V ADJ
IN OUTX3
1.82K
R20
15
R43
J43
1
5.62K
R28
D2
T2
14
1
OV1
4.735V
C1
D15
3W3.3VDZ4
D14 D17
4.735V
C33
4.735V
C10
D1
D12
T2
10
5
50V0.1C5
5.62
K
R45
GND
IN OUTX6
OV2
GND
IN OUTX7
1.035V
C29
D13
100V10pC28
T2
11
4
Shutdown249R
33
1.035V
C30
50V0.1C9
J43
5
150
R44
J43
4
150
R25
J43
10
> 55 VDC
Overvoltage
600V1A
600V1A
.33W CAN
+5Volts, .100 Amp
RS232
+5Volts, .100 Amp
.33W
50V820pC4
Shut DownCapacitor
DC Input (+) 1A
OV1
600V
56.2K
R39
J411
J414
4.735V
C6
3W24VDZ1
+tR55
T1
7
6
100V10pC3250V
820pC8
J413
6.19
K
R3
J412
D3 VFB
CS
COMPRT/CT
VCC OUT
VREF
GNDX5
2
35
1
6
4
8
7
DC Input (-)
50V0.1C7
Machine Control
100K
R10
5.62K
R12
1.0A30V
D21
GND
N.A. SINCE COMPONENTS OR CIRCUITRY ON A PRINTED CIRCUIT BOARD MAY CHANGE
NUMBER.
NOT SHOW THE EXACT COMPONENTS OR CIRCUITRY OF CONTROLS HAVING A COMMON CODEWITHOUT AFFECTING THE INTERCHANGEABILITY OF A COMPLETE BOARD, THIS DIAGRAM MAY
NOTES :
15Volts, .250Amps
SPI
.33W
Operation
J43
6
10.0K
R22
J43
3
100V
150pC46
43.2
K
R18
+t
60V.13
R40
J43
11
X2
TL431 REF8
1
6
44.2
K
R42
J43
12
CNY17-3OCI3
42
1
6
5
50V
2700p
C16
Vfb2
Vref 2
+5Volts, 3 Amps
SPI
475K
R21
200V1C13
10.0K
R4
6A200V
D4
10.0K
R2710.0K
R2
Operation10-55 VDC 33.2
R15
10010V
C43
47.5
R58
T1
1 2
11 12
10.0
R60
+t
60V.13
R50
10.0
R9
47.5
R6
47.5
R7
10.0
R61
+5Volts, .750 Amp
10010V
C41
332
R53
50V0.1C39
6A200V
D18
33.2
R16
LED2
+5V
Vref 1
Machine Control Power Supply
47.5
R57
T1
10
3
1.0A30V
D22
2000V.0015C12
J423
43.2
K
R49
100K
R5
221K
R52
44.2
K
R51
50V
2700p
C42
10.0K
R13
CNY17-3OCI1
42
1
6
5
1.82K
R14
D24
J425
J422
J426
3A600V
D19
G
D
S
21A200V
Q1
30.1
R35
475
R8
30.1
R36
3W18VDZ8
3W0.05 R1
1
T1
5
8
3325V
C11
50V0.1C14
.33W
1.035V
C471.21K
R46
ADJ
IN OUTX8
ADJ
IN OUTX9
T1
9
4
1.035V
C40
J421
X1
TL431 REF8
1
6
1.21K
R48
50V0.1C44
4.735V
C38
gnd_mcps
Vfb1
Vfb1
.750 Amp
+15Volts
-15Volts, .100Amp
1A600V
.33W
D8
100V150pC45
2.49K
R23
50V0.1C21
J43
2
J43
7
150
R64
J43
8
+t.24
R17
150
R62
LED1
2.49K
R19
10010V
C35
150
R63
332
R41
50V0.1C34
10010V
C37
16A200V
D16
10010V
C36
D7
D6
4.735V
C194.735V
C20T2
8
7
4.735V
C184.735V
C17
T2
13
2
50V0.1C22
+ t.24
R24
.33W
.33W
1A
1A600V
600V
.33W.33W.33W
.200 AmpsGate Drive
+20Volts
Gate Drive
+20Volts.200 Amps
T2
9
6
SO
LID
ED
GE
EN-1
70
MANUFACTURING TOLERANCE PER E2056UNLESS OTHERWISE SPECIFIED TOLERANCE
SCALE:DO NOT SCALE THIS DRAWING
ON 3 PLACE DECIMALS IS ±� .002
THIS SHEET CONTAINS PROPRIETARY INFORMATION OWNED BY THE LINCOLN ELECTRIC COMPANY AND IS NOT TO BE REPRODUCED, DISCLOSED OR USED WITHOUT THE EXPRESS WRITTEN PERMISSION OF THE LINCOLN ELECTRIC COMPANY, CLEVELAND, OHIO U.S.A.
DESIGN INFORMATION
t
DRAWN BY:
WITH PUBLISHED STANDARDS.DATE:
ON 2 PLACE DECIMALS IS ±�.02
MATERIAL TOLERANCE (" ") TO AGREEON ALL ANGLES IS ±� .5 OF A DEGREE SUBJECT:
ENGINEER:
EQUIPMENT TYPE:
DRAWING No.:
JP\TKDigital Systems
Digital Power SupplyGNONE 11-30-98
REFERENCE:
SUPERSEDING:
APPROVED: 3631
Chg. Sheet No."X" INFO.
XM5626
XB
6-2-2000A
EARTH GROUND CONNECTION
POWER SUPPLY SOURCE POINT
VOLTAGE NETSUPPLY
R-
FRAME CONNECTION
LAST NO. USED
COMMON CONNECTION
D-
C-
LABELSCAPACITORS =
UNLESS OTHERWISE SPECIFIED)
DIODES =
FILENAME: G3631-2D0
MFD (
GENERAL INFORMATION
UNLESS OTHERWISE SPECIFIED)
RESISTORS = Ohms (
(UNLESS OTHERWISE SPECIFIED)1A, 400V
ELECTRICAL SYMBOLS PER E1537
1/4W
.022/50V
G-9
NOTE: This diagram is for reference only. It may not be accurate for all machines covered by this manual.
NOTE: Lincoln Electric assumes no responsibility for liablilities resulting from board level troubleshooting. PC Board repairs will invalidate your factory warranty. Individual Printed Circuit Board Components are not available from Lincoln Electric. This information is pro-vided for reference only. Lincoln Electric discourages board level troubleshooting and repair since it may compromise the quality of the design and may result in danger to the Machine Operator or Technician. Improper PC board repairs could result in damage to themachine.
ELECTRICAL DIAGRAMS G-10
V350-PRO
PC BOARD ASSEMBLY-POWER SUPPLY
SO
LID
ED
GE
EN-1
70
MANUFACTURING TOLERANCE PER E2056UNLESS OTHERWISE SPECIFIED TOLERANCE
SCALE:DO NOT SCALE THIS DRAWING
ON 3 PLACE DECIMALS IS ±� .002
THIS SHEET CONTAINS PROPRIETARY INFORMATION OWNED BY THE LINCOLN ELECTRIC COMPANY AND IS NOT TO BE REPRODUCED, DISCLOSED OR USED WITHOUT THE EXPRESS WRITTEN PERMISSION OF THE LINCOLN ELECTRIC COMPANY, CLEVELAND, OHIO U.S.A.
DESIGN INFORMATION
t
DRAWN BY:
WITH PUBLISHED STANDARDS.DATE:
ON 2 PLACE DECIMALS IS ±�.02
MATERIAL TOLERANCE (" ") TO AGREEON ALL ANGLES IS ±� .5 OF A DEGREE SUBJECT:
N.A. SEE HEAT SINK MOUNTING DETAILS.N.B. ALL CONNECTORS MUST BE GREASED WITH ITEM 5 PRIOR TO ENCAPSULATION.N.C. ATTACH ITEM 1 TO ITEM 2 (2 PLACES) WITH ITEM 3 (TOURQUE = 5.3 +/- .05 IN-LB). ITEM 1 SHOULD BE ALLIGNED SO THAT THE DISTANCE BETWEEN ITEM 1's CONNECTORS AND ITEM 2 IS AS LARGE AS POSSIBLE.N.D. ENCAPSULATION PER E1911-E TO A MINIMUM DEPTH SO ALLOF THE COMPONENTS LEADS ARE COVERED.N.E . TIGHTEN TO 6-8 in. lbs. WITHOUT APPLYING ANY PRESSURE TO PLASTIC CASE OF ITEM 51.N.F . PLACE A HEAVY FILM OF ITEM 74 ON HEATSINK SURFACE- DO NOT GET ON THREADS.N.G. PLACE BARCODED ASSEMBLY NUMBER IDENTIFICATION AND BARCODED SERIAL NUMBER IDENTIFICATION IN AREA SHOWN.
NOTE: This diagram is for reference only. It may not be accurate for all machines covered by this manual.
NOTE: Lincoln Electric assumes no responsibility for liablilities resulting from board level troubleshooting. PC Board repairs will invalidate your factory warranty. Individual Printed Circuit Board Components are not available from Lincoln Electric. This information is pro-vided for reference only. Lincoln Electric discourages board level troubleshooting and repair since it may compromise the quality of the design and may result in danger to the Machine Operator or Technician. Improper PC board repairs could result in damage to themachine.
ELECTRICAL DIAGRAMS G-12
V350-PRO
PC BOARD ASSEMBLY-SWITCH
SO
LID
ED
GE
EN-1
70
MANUFACTURING TOLERANCE PER E2056UNLESS OTHERWISE SPECIFIED TOLERANCE
SCALE:DO NOT SCALE THIS DRAWING
ON 3 PLACE DECIMALS IS ±� .002
THIS SHEET CONTAINS PROPRIETARY INFORMATION OWNED BY THE LINCOLN ELECTRIC COMPANY AND IS NOT TO BE REPRODUCED, DISCLOSED OR USED WITHOUT THE EXPRESS WRITTEN PERMISSION OF THE LINCOLN ELECTRIC COMPANY, CLEVELAND, OHIO U.S.A.
DESIGN INFORMATION
t
DRAWN BY:
WITH PUBLISHED STANDARDS.DATE:
ON 2 PLACE DECIMALS IS ±�.02
MATERIAL TOLERANCE (" ") TO AGREEON ALL ANGLES IS ±� .5 OF A DEGREE SUBJECT:
PART NO. NOTES:N.A. CAUTION: THIS DEVICE IS SUBJECT TO DAMAGE BY STATIC ELECTRICITY. LINCOLN ELECTRIC TO SEE E2454 BEFORE HANDLING.N.B. SNAP POWER TERMINALS INTO COMPONENT SIDE OF BOARD.N.C. THIS AREA TO BE COVERED ON BOTH SIDES OF BOARD (WHERE POSSIBLE) WITH SEALANT PRIOR TO ENCAPSULATION.N.D. INJECT SEALANT ITEM 8 THROUGH THE PC BOARD TO SEAL MODULE LEADS (16 PLACES), AND ALL COMPONENT LEADS ON THE NONO-COMPONENT SIDE OF THE BOARD, THAT ARE COVERED BY MODULE CASE.N.E. FEMALE EYELET TO BE AGAINST THE NON-COMPONENT SIDE AS SHOWN EYELET MUST NOT SPIN AFTER CLINCHING.N.F. SOLDER EYELET SO THAT SOLDER COVERS ENTIRE EYELET AND ALL AROUND EYELET ON COPPER SIDE ONLY. NO ICICLES OR SOLDER BLOBS PERMITTED.N.G. AFTER SOLDERING, INSPECT POWER TERMINAL CONNECTIONS TO ENSURE SOLDER HAS PROPERLY WET COMPONENT SIDE PAD ON A MINIMUM OF 3 OF THE 4 LEGS OF THE POWER TERMINAL.N.H. BAR MUST BE FREE OF ENCAPSULATION MATERIAL ON BOTH SURFACES AROUND MOUNTING HOLES AND ENTIRE LENGTH OF MOUNTING SURFACE. ENCAPSULATION MATERIAL MUST NOT EXTEND BEYOND THE MOUNTING SURFACE PLANE. (2 PLACES)N.J. DO NOT COAT WITH ENCAPSULATION MATERIAL, TOP AND BOTTOM, .80 +/- .05” DIA.N.K. PC BOARD HOLES TO BE FREE OF ENCAPSULATION MATERIAL AND SEALANT FOR A DIAMETER OF .50” FOR THE LARGER HOLES, AND .25 FOR THE SMALLER HOLES, BOTH SIDES OF BOARD. (4 PLACES).N.L. THIS AREA TO BE COVERED ON COMPONENT SIDE OF BOARD WITH SEALANT PRIOR TO ENCAPSULATION. MATERIAL MUST BE APPLIED FROM TOP TO COMPLETELY FILL TO UNDERSIDE OF DEVICE. THEN APPLY SEALANT AROUND BASE OF DEVICE.N.M. THIS AREA TO BE COVERED ON OPPOSITE COMPONENT SIDE OF BOARD WITH ITEM 8 PRIOR TO ENCAPSULATION. DO NOT COAT WITH ENCAPSULATION MATERIAL ON THE TOP SURFACES NOR THE THREADS.N.N. THESE SURFACES MUST BE MAINTAINEDCO-PLANAR WITHIN .010” THROUGH ENTIRE SOLDERING AND SEALING PROCESS.N.P. SEALANT HEIGHT BETWEEN MODULES NOT TO EXCEED .17” MAX.
NOTE: This diagram is for reference only. It may not be accurate for all machines covered by this manual.
NOTE: Lincoln Electric assumes no responsibility for liablilities resulting from board level troubleshooting. PC Board repairs will invalidate your factory warranty. Individual Printed Circuit Board Components are not available from Lincoln Electric. This information is pro-vided for reference only. Lincoln Electric discourages board level troubleshooting and repair since it may compromise the quality of the design and may result in danger to the Machine Operator or Technician. Improper PC board repairs could result in damage to themachine.
ELECTRICAL DIAGRAMS G-14
V350-PRO
PC BOARD ASSEMBLY-DISPLAY
SO
LID
ED
GE
EN-1
68
MANUFACTURING TOLERANCE PER E2056UNLESS OTHERWISE SPECIFIED TOLERANCE
SCALE:DO NOT SCALE THIS DRAWING
ON 3 PLACE DECIMALS IS ±� .002
THIS SHEET CONTAINS PROPRIETARY INFORMATION OWNED BY THE LINCOLN ELECTRIC COMPANY AND IS NOT TO BE REPRODUCED, DISCLOSED OR USED WITHOUT THE EXPRESS WRITTEN PERMISSION OF THE LINCOLN ELECTRIC COMPANY, CLEVELAND, OHIO U.S.A.
DESIGN INFORMATION
t
DRAWN BY:
WITH PUBLISHED STANDARDS.DATE:
ON 2 PLACE DECIMALS IS ±�.02
MATERIAL TOLERANCE (" ") TO AGREEON ALL ANGLES IS ±� .5 OF A DEGREE SUBJECT:
FOR ITEMS BELOW REFER TO ELECTRONIC COMPONENT DATABASE FOR COMPONENT
SPECIFICATIONS
ITEM REQ'DPART NO. DESCRIPTION
G-14
ELECTRICAL DIAGRAMS G-15
V350-PRO
SCHEMATIC -STATUS PRINTED CIRCUIT BOARD
G-15
NOTE: This diagram is for reference only. It may not be accurate for all machines covered by this manual.
NOTE: Lincoln Electric assumes no responsibility for liablilities resulting from board level troubleshooting. PC Board repairs will invalidate your factory warranty. Individual Printed Circuit Board Components are not available from Lincoln Electric. This information is pro-vided for reference only. Lincoln Electric discourages board level troubleshooting and repair since it may compromise the quality of the design and may result in danger to the Machine Operator or Technician. Improper PC board repairs could result in damage to themachine.
ELECTRICAL DIAGRAMS G-16
V350-PRO
PC BOARD ASSEMBLY-STATUS
SO
LID
ED
GE
EN-1
68
MANUFACTURING TOLERANCE PER E2056UNLESS OTHERWISE SPECIFIED TOLERANCE
SCALE:DO NOT SCALE THIS DRAWING
ON 3 PLACE DECIMALS IS ±� .002
THIS SHEET CONTAINS PROPRIETARY INFORMATION OWNED BY THE LINCOLN ELECTRIC COMPANY AND IS NOT TO BE REPRODUCED, DISCLOSED OR USED WITHOUT THE EXPRESS WRITTEN PERMISSION OF THE LINCOLN ELECTRIC COMPANY, CLEVELAND, OHIO U.S.A.
DESIGN INFORMATION
t
DRAWN BY:
WITH PUBLISHED STANDARDS. DATE:
ON 2 PLACE DECIMALS IS ±�.02
MATERIAL TOLERANCE (" ") TO AGREEON ALL ANGLES IS ±� .5 OF A DEGREE SUBJECT:
1NOTES:N.A. CAUTION: THIS DEVICE IS SUBJECT TO DAMAGE BY STATIC ELECTRICITY. SEE E2454 BEFORE HANDLING.N.B. DO NOT COAT WITH ENCAPSULATION MATERIAL.N.C. DO NOT INSERT THESE COMPONENTS.N.D. INSERT ITEM 3 BETWEEN ROWS OF LED’s. ITEM 3 MUST BE FLUSH WITH LED BULB.N.E. ALL CONNECTORS MUST BE GREASED WITH ITEM 4 PRIOR TO ENCAPSULATION.N.F. LED 1 THRU LED 16 MUST ALWAYS BE MATCHED BY VENDOR NAME AND VENDOR PART NUMBER. DO NOT MIX DIFFERENT VENDORS OR VENDOR PART NUMBERS ON THE SAME BOARD ASSEMBLY.
N.B.
N.B.N.B.
ENCAPSULATE WITH HUMISEAL 1A27LU PERE1844 OR WITH EQUIVALENT AS APPROVEDBY LINCOLN ELECTRIC COMPANY. (2 COATS)
27 S20496-1 2 X6,X7 IC,CMOS,DRIVER,DISPLAY,LED, CC,MCUN.C. 28 T13657-11 0 LED 5, LED 8 RED LED
FOR ITEMS LISTED BELOW REFER TO ELECTRONIC COMPONENT DATABASE FOR COMPONENT SPECIFICATIONS
33
N.D.
N.B.
STATUS INPUTL11107-2
X
7
LED9 S2
X1 R
27
C
18
R11
C15
C16
R12
R13
C17
R
24
R25 LED1 LED2
LED10 LED11 LED12
C4
C13
R
14
R
9
R10
C
14
C3
X2
C1
C2
J31
X6
C11
C
24
R6
X4
C5
C
21
R
19
R
23
R
18
LED8
LED13 LED14
LED7 LED6
LED15 LED16
LED5
C26
C12
X3
C
9
R1
R2
C6
C7 X5
R
3
R21
R
4
C
10 C
8
R
22
C
23
S1 R
17
C
22
C
27
R
26
C
25
LED3 LED4
R
20
R20
J311
N.D.
.00.18
2.78 4.38 6.88
7.587.80
.00
1.11
.16
2.06
2.30
G-16
ELECTRICAL DIAGRAMS G-17
V350-PRO
SCHEMATIC - MODE SELECT PRINTED CIRCUIT BOARD
G-17
NOTE: This diagram is for reference only. It may not be accurate for all machines covered by this manual.
NOTE: Lincoln Electric assumes no responsibility for liablilities resulting from board level troubleshooting. PC Board repairs will invalidate your factory warranty. Individual Printed Circuit Board Components are not available from Lincoln Electric. This information is pro-vided for reference only. Lincoln Electric discourages board level troubleshooting and repair since it may compromise the quality of the design and may result in danger to the Machine Operator or Technician. Improper PC board repairs could result in damage to themachine.
ELECTRICAL DIAGRAMS G-18
V350-PRO
PC BOARD ASSEMBLY-MODE SELECT
SO
LID
ED
GE
EN-1
68
MANUFACTURING TOLERANCE PER E2056UNLESS OTHERWISE SPECIFIED TOLERANCE
SCALE:DO NOT SCALE THIS DRAWING
ON 3 PLACE DECIMALS IS ±� .002
THIS SHEET CONTAINS PROPRIETARY INFORMATION OWNED BY THE LINCOLN ELECTRIC COMPANY AND IS NOT TO BE REPRODUCED, DISCLOSED OR USED WITHOUT THE EXPRESS WRITTEN PERMISSION OF THE LINCOLN ELECTRIC COMPANY, CLEVELAND, OHIO U.S.A.
DESIGN INFORMATION
t
DRAWN BY:
WITH PUBLISHED STANDARDS.DATE:
ON 2 PLACE DECIMALS IS ±�.02
MATERIAL TOLERANCE (" ") TO AGREEON ALL ANGLES IS ±� .5 OF A DEGREE SUBJECT:
ENCAPSULATE WITH HUMISEAL 1A27LU PERE1844 OR WITH EQUIVALENT AS APPROVEDBY LINCOLN ELECTRIC COMPANY. (2 COATS)
NOTES:
N.A. DO NOT COAT WITH ENCAPSULATION MATERIAL.
N.B. CAUTION: THIS DEVICE IS SUBJECT TO DAMAGE BY STATIC ELECTRICITY. SEE E2454 BEFORE HANDLING.
N.C. DO NOT INSERT THESE COMPONENTS.
N.D. THERE MUST NOT BE MORE THAN .010 GAP BETWEEN SPACERS, OR BETWEEN SPACER & LED, OR BETWEEN SPACER & P.C. BOARD. ENCAPSULATE P.C. BOARD, SPACERS & LOWER HALF OF LED.
N.E. CONNECTOR MUST BE GREASED WITH ITEM 4 PRIOR TO ENCAPSULATION.
2
1
0
2.10
0 N.A., N.E.
N.A.N.A.
PART NO.
BUY PER E3867TEST PER E3856-MS
V
GROUND SIDE
N.A.
N.A.
6.90
J34
L11110-1L11110-1
ARB
MODE SELECTMODE SELECT
R
3
R9
R
23
R
24
R
14
R
13
R12
R11
R
10
R
4 R
6
R
20
R
21
R
16
R
18
R
19
R
17
X3 X2
X1
C2
C
6
C
8
C
4
C
3
C
5
C
12
C
10
C
23
C
22
X5
C
25
C
28
C
29
C
30
C
31
C
32
LED1
LED2
LED3
LED4
LED5
R
15
R
25
R
26
R
27
X6 C1
C
7
C9
C11
R
1
R
2
R5 R7
S1
X4
C13
C16
C15
C
18
C
14
C
17
N.D.
3
PC BOARD REFERENCEDESIGNATORS
1 L11110-A 1 P.C. BOARD BLANK2 L11166-1 1 FLEX ASSEMBLY3 T15176-1 10 LED SPACER4 E3539 .01 oz. ELEC. INSUL. COMPOUND
FOR ITEMS BELOW REFER TO ELECTRONIC COMPONENT DATABASE FOR COMPONENT SPECIFICATIONS
ITEM PART NO. REQ'D DESCRIPTION
G-18
ELECTRICAL DIAGRAMS G-19
V350-PRO
SCHEMATIC - REMOTE PRINTED CIRCUIT BOARD
G-19
NOTE: This diagram is for reference only. It may not be accurate for all machines covered by this manual.
NOTE: Lincoln Electric assumes no responsibility for liablilities resulting from board level troubleshooting. PC Board repairs will invalidate your factory warranty. Individual Printed Circuit Board Components are not available from Lincoln Electric. This information is pro-vided for reference only. Lincoln Electric discourages board level troubleshooting and repair since it may compromise the quality of the design and may result in danger to the Machine Operator or Technician. Improper PC board repairs could result in damage to themachine.
ELECTRICAL DIAGRAMS G-20
V350-PRO
PC BOARD ASSEMBLY-REMOTE
SO
LID
ED
GE
EN-1
68
MANUFACTURING TOLERANCE PER E2056UNLESS OTHERWISE SPECIFIED TOLERANCE
SCALE:DO NOT SCALE THIS DRAWING
ON 3 PLACE DECIMALS IS ± .002
THIS SHEET CONTAINS PROPRIETARY INFORMATION OWNED BY THE LINCOLN ELECTRIC COMPANY AND IS NOT TO BE REPRODUCED, DISCLOSED OR USED WITHOUT THE EXPRESS WRITTEN PERMISSION OF THE LINCOLN ELECTRIC COMPANY, CLEVELAND, OHIO U.S.A.
DESIGN INFORMATION
t
DRAWN BY:
WITH PUBLISHED STANDARDS.DATE:
ON 2 PLACE DECIMALS IS ± .02
MATERIAL TOLERANCE (" ") TO AGREEON ALL ANGLES IS ± .5 OF A DEGREE SUBJECT:
NOTE: This diagram is for reference only. It may not be accurate for all machines covered by this manual.
NOTE: Lincoln Electric assumes no responsibility for liablilities resulting from board level troubleshooting. PC Board repairs will invalidate your factory warranty. Individual Printed Circuit Board Components are not available from Lincoln Electric. This information is pro-vided for reference only. Lincoln Electric discourages board level troubleshooting and repair since it may compromise the quality of the design and may result in danger to the Machine Operator or Technician. Improper PC board repairs could result in damage to themachine.
ELECTRICAL DIAGRAMS G-22
V350-PRO
PC BOARD ASSEMBLY-SNUBBEREN
-166
SO
LID
ED
GE
MANUFACTURING TOLERANCE PER E2056UNLESS OTHERWISE SPECIFIED TOLERANCE
SCALE:DO NOT SCALE THIS DRAWING
ON 3 PLACE DECIMALS IS ± .002
THIS SHEET CONTAINS PROPRIETARY INFORMATION OWNED BY THE LINCOLN ELECTRIC COMPANY AND IS NOT TO BE REPRODUCED, DISCLOSED OR USED WITHOUT THE EXPRESS WRITTEN PERMISSION OF THE LINCOLN ELECTRIC COMPANY, CLEVELAND, OHIO U.S.A.
DESIGN INFORMATION
t
DRAWN BY:
WITH PUBLISHED STANDARDS.DATE:
ON 2 PLACE DECIMALS IS ± .02
MATERIAL TOLERANCE (" ") TO AGREEON ALL ANGLES IS ± .5 OF A DEGREE SUBJECT:
Chg. Sheet No.
ENGINEER:
EQUIPMENT TYPE:
DRAWING No.:
F.V.INVERTER WELDERS
SNUBBER P.C. BOARD ASSEMBLYMNONE 10-6-99
REFERENCE:
SUPERSEDING:
APPROVED:
"X" INFO.
XM5626
XC-UF
19532-1
6-2-2000
N.A., N.B.
SIDECOPPER
.105
HEIGHTCRIMP
.285
.275
EYELET DETAIL
R .045
MAX.
∅
4
3
B20
T147
10
R2
12
RW
5F
C2 BOXCP4
B30
T147
10
R3
12
RW
5F
C3
BOXCP4
B40
T147
10
R4
12
RW
5F
C4
BOXCP4
B1
QC16
C1
BOXCP4
B10
T147
10
R1
12
RW
5F
SNU
BBER
M19
532-
1
0
.55
1.92
2.90 +.04
0
.60 1.75 2.90 3.50 +.04
1
2
MAKE PER E1911ENCAPSULATE WITH E1844, 2 COATSTEST PER E3817-SN
M19532-1A0
MANUFACTURED AS:
IDENTIFICATION CODE
ITEM PART NO. DESCRIPTION QTY1 M19532-A P.C. BOARD BLANK 1
NOTES:N.A. FEMALE EYELET TO BE AGAINST THE COPPER SIDE AS SHOWN EYELET MUST NOT SPIN AFTER CLINCHING.N.B. SOLDER EYELET SO THAT SOLDER COVERS ENTIRE EYELET AND ALL AROUND EYELET ON COPPER SIDE ONLY. NO ICICLES OR SOLDER BLOBS PERMITTED.
We need to know if there are errors in our manuals. We also value any suggestions as toadditional tests or procedures that would make this SVM a better tool for you.
If you discover new or different “Problems or Symptoms” that are not covered in the three col-umn troubleshooting chart, please share this information with us. Please include themachine’s code number and how the problem was resolved.
Thank You,Technical Services GroupLincoln Electric Co.22801 ST. Clair Ave.Cleveland, Ohio 44117-1199