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    IDEALARC

    DC1000

    Operators Manual

    Save for future reference

    Date Purchased

    Code: (ex: 10859)

    Serial: (ex: U1060512345)

    IM420-E | Issue Date 12-Dec Lincoln Global, Inc. All Rights Reserved.

    For use with machines having Code Numbers:

    9919, 9920, 9921, 9922, 9923, 9924,

    9925, 10293, 11305, 11330, 11331,

    11332, 11333, 11334, 11681, 11682,

    11683, 11684, 11950, 11951, 11952,

    11953

    Register your machine:

    www.lincolnelectric.com/register

    Authorized Service and Distributor Locator:

    www.lincolnelectric.com/locator

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    FOR ENGINEpowered equipment.

    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 fumesoutdoors.

    ____________________________________________________1.c. Do not add the fuel near an open flame

    welding arc or when the engine is running.Stop the engine and allow it to cool beforerefueling to prevent spilled fuel from vaporiz-ing on contact with hot engine parts andigniting. Do not spill fuel when filling tank. Iffuel is spilled, wipe it up and do not startengine until fumes have been eliminated.

    ____________________________________________________

    1.d. Keep all equipment safety guards, covers and devices in

    position and in good repair.Keep hands, hair, clothing and

    tools away from V-belts, gears, fans and all other moving

    parts when 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 requir ing 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.

    iSAFETYi

    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 availablefrom the Lincoln Electric Company, 22801 St. Clair Avenue, Cleveland, Ohio 44117-1199.

    BE SURE THAT ALL INSTALLATION, OPERATION, MAINTENANCE AND REPAIR PROCEDURES ARE

    PERFORMED ONLY BY QUALIFIED INDIVIDUALS.

    WARNING

    ELECTRIC ANDMAGNETIC 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, and

    welders having a pacemaker should consult their physician

    before welding.

    2.c. Exposure to EMF fields in welding may have other health

    effects which are now not known.

    2.d. All welders should use the following procedures in order to

    minimize exposure to EMF fields from the welding circuit:

    2.d.1. Route the electrode and work cables together - Secure

    them 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 and

    work 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 as

    possible 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

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    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 cankill.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 bare

    skin or wet clothing. Wear dry, hole-free

    gloves to insulate hands.

    3.b. Insulate yourself from work and ground using dry insulation.

    Make certain the insulation is large enough to cover your full

    area of physical contact with work and ground.

    In addition to the normal safety precautions, if welding

    must be performed under electrically hazardous

    conditions (in damp locations or while wearing wet

    clothing; on metal structures such as floors, gratings or

    scaffolds; when in cramped positions such as sitting,

    kneeling or lying, if there is a high risk of unavoidable or

    accidental contact with the workpiece or ground) use

    the 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 semiautomatic

    welding gun are also electrically hot.

    3.d. Always be sure the work cable makes a good electrical

    connection with the metal being welded. The connection

    should 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 and

    welding machine in good, safe operating condition. Replace

    damaged insulation.

    3.g. Never dip the electrode in water for cooling.

    3.h. Never simultaneously touch electrically hot parts of

    electrode holders connected to two welders because voltage

    between the two can be the total of the open circuit voltage

    of both welders.

    3.i. When working above floor level, use a safety belt to protect

    yourself from a fall should you get a shock.

    3.j. Also see Items 6.c. and 8.

    iiSAFETYii

    FUMES AND GASES

    can be dangerous.5.a. Welding may produce fumes and gases

    hazardous to health. Avoid breathing these

    fumes and gases. When welding, keep

    your head out of the fume. Use enough

    ventilation and/or exhaust at the arc to keep

    fumes and gases away from the breathing zone. When

    welding with electrodes which require specialventilation such as stainless or hard facing (see

    instructions on container or MSDS) or on lead or

    cadmium plated steel and other metals or coatings

    which produce highly toxic fumes, keep exposure as

    low as possible and within applicable OSHA PEL and

    ACGIH TLV limits using local exhaust or mechanical

    ventilation. In confined spaces or in some circum-

    stances, outdoors, a respirator may be required.

    Additional precautions are also required when welding

    on galvanized steel.

    5. b. The operation of welding fume control equipment is affected

    by various factors including proper use and positioning of

    the equipment, maintenance of the equipment and the spe-

    cific welding procedure and application involved. Workerexposure level should be checked upon installation and

    periodically thereafter to be certain it is within applicable

    OSHA PEL and ACGIH TLV limits.

    5.c. Do not weld in locations near chlorinated hydrocarbon vapors

    coming from degreasing, cleaning or spraying operations.

    The heat and rays of the arc can react with solvent vapors to

    form phosgene, a highly toxic gas, and other irritating prod-

    ucts.

    5.d. Shielding gases used for arc welding can displace air and

    cause injury or death. Always use enough ventilation,

    especially in confined areas, to insure breathing air is safe.

    5.e. Read and understand the manufacturers instructions for this

    equipment and the consumables to be used, including the

    material safety data sheet (MSDS) and follow your

    employers safety practices. MSDS forms are available from

    your welding distr ibutor or from the manufacturer.

    5.f. Also see item 1.b.

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    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 manufacturersrecommendations.

    8.c. Ground the equipment in accordance with the U.S. NationalElectrical Code and the manufacturers recommendations.

    CYLINDER may explode

    if damaged.7.a. Use only compressed gas cylinders

    containing the correct shielding gas for theprocess used and properly operat ingregulators 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.

    WELDING and CUTTINGSPARKS 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 hotmaterials from welding can easily go through small cracksand openings to adjacent areas. Avoid welding near

    hydraulic 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 contactcan cause 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 have

    been 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 cir-cuits. This can create fire hazards or overheat lifting chainsor cables until they fail.

    6.h. Also see item 1.c.

    6.I. Read and follow NFPA 51B Standard for Fire PreventionDuring Welding, Cutting and Other Hot Work, availablefrom NFPA, 1 Batterymarch Park, PO box 9101, Quincy, Ma022690-9101.

    6.j. Do not use a welding power source for pipe thawing.

    iiiSAFETYiii

    Refer to http://www.lincolnelectric.com/safety for additional safety information.

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    PRCAUTIONS DE SRETPour votre propre protection lire et observer toutes les instructions

    et les prcautions de sret specifiques qui parraissent dans ce

    manuel aussi bien que les prcautions de sret gnrales suiv-

    antes:

    Sret Pour Soudage A LArc1. Protegez-vous contre la secousse lectrique:

    a. Les circuits llectrode et la pice sont sous tension

    quand la machine souder est en marche. Eviter toujours

    tout contact entre les parties sous tension et la peau nue

    ou les vtements mouills. Porter des gants secs et sans

    trous pour isoler les mains.

    b. Faire trs attention de bien sisoler de la masse quand on

    soude dans des endroits humides, ou sur un plancher

    metallique ou des grilles metalliques, principalement dans

    les positions assis ou couch pour lesquelles une grande

    partie du corps peut tre en contact avec la masse.

    c. Maintenir le porte-lectrode, la pince de masse, le cble

    de soudage et la machine souder en bon et sr tat

    defonctionnement.d.Ne jamais plonger le porte-lectrode dans leau pour le

    refroidir.

    e. Ne jamais toucher simultanment les parties sous tension

    des porte-lectrodes connects deux machines souder

    parce que la tension entre les deux pinces peut tre le

    total de la tension vide des deux machines.

    f. Si on utilise la machine souder comme une source de

    courant pour soudage semi-automatique, ces precautions

    pour le porte-lectrode sapplicuent aussi au pistolet de

    soudage.

    2. Dans le cas de travail au dessus du niveau du sol, se protger

    contre les chutes dans le cas ou on recoit un choc. Ne jamaisenrouler le cble-lectrode autour de nimporte quelle partie

    du corps.

    3. Un coup darc peut tre plus svre quun coup de soliel,

    donc:

    a. Utiliser un bon masque avec un verre filtrant appropri

    ainsi quun verre blanc afin de se protger les yeux du ray-

    onnement de larc et des projections quand on soude ou

    quand on regarde larc.

    b. Porter des vtements convenables afin de protger la

    peau de soudeur et des aides contre le rayonnement de

    larc.

    c. Protger lautre personnel travaillant proximit au

    soudage laide dcrans appropris et non-inflammables.

    4. Des gouttes de laitier en fusion sont mises de larc de

    soudage. Se protger avec des vtements de protection libres

    de lhuile, tels que les gants en cuir, chemise paisse, pan-

    talons sans revers, et chaussures montantes.

    5. Toujours porter des lunettes de scurit dans la zone de

    soudage. Utiliser des lunettes avec crans lateraux dans les

    zones o lon pique le laitier.

    6. Eloigner les matriaux inflammables ou les recouvrir afin de

    prvenir tout risque dincendie d aux tincelles.

    7. Quand on ne soude pas, poser la pince une endroit isol de

    la masse. Un court-circuit accidental peut provoquer un

    chauffement et un risque dincendie.

    8. Sassurer que la masse est connecte le plus prs possible

    de la zone de travail quil est pratique de le faire. Si on place

    la masse sur la charpente de la construction ou dautres

    endroits loigns de la zone de travail, on augmente le risque

    de voir passer le courant de soudage par les chaines de lev-

    age, cbles de grue, ou autres circuits. Cela peut provoquer

    des risques dincendie ou dechauffement des chaines et des

    cbles jusqu ce quils se rompent.

    9. Assurer une ventilation suffisante dans la zone de soudage.

    Ceci est particulirement important pour le soudage de tles

    galvanises plombes, ou cadmies ou tout autre mtal quiproduit des fumes toxiques.

    10. Ne pas souder en prsence de vapeurs de chlore provenant

    doprations de dgraissage, nettoyage ou pistolage. La

    chaleur ou les rayons de larc peuvent ragir avec les vapeurs

    du solvant pour produire du phosgne (gas fortement toxique)

    ou autres produits irritants.

    11. Pour obtenir de plus amples renseignements sur la sret,

    voir le code Code for safety in welding and cutting CSA

    Standard W 117.2-1974.

    PRCAUTIONS DE SRET POURLES MACHINES SOUDER TRANSFORMATEUR ET REDRESSEUR

    1. Relier la terre le chassis du poste conformement au code de

    llectricit et aux recommendations du fabricant. Le dispositif

    de montage ou la piece souder doit tre branch une

    bonne mise la terre.

    2. Autant que possible, Iinstallation et lentretien du poste seront

    effectus par un lectricien qualifi.

    3. Avant de faires des travaux linterieur de poste, la debranch-

    er linterrupteur la boite de fusibles.

    4. Garder tous les couvercles et dispositifs de sret leur

    place.

    ivSAFETYiv

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    vv

    Thank Youfor selecting a QUALITY product by Lincoln Electric. We want you

    to take pride in operating this Lincoln Electric Company product as much pride as we have in bringing this product to you!

    Read this Operators Manual completely before attempting to use this equipment. Save this manual and keep it

    handy for quick reference. Pay particular attention to the safety instructions we have provided for your protection.

    The level of seriousness to be applied to each is explained below:

    WARNING

    This statement appears where the information must be followed exactly to avoid serious personal injury or loss of life.

    This statement appears where the information must be followed to avoid minor personal injury or damage to this equipment.

    CAUTION

    Please Examine Carton and Equipment For Damage ImmediatelyWhen this equipment is shipped, title passes to the purchaser upon receipt by the carrier. Consequently, Claimsfor material damaged in shipment must be made by the purchaser against the transportation company at thetime the shipment is received.

    Please record your equipment identification information below for future reference. This information can be

    found on your machine nameplate.

    Product _________________________________________________________________________________

    Model Number ___________________________________________________________________________

    Code Number or Date Code_________________________________________________________________

    Serial Number____________________________________________________________________________

    Date Purchased___________________________________________________________________________

    Where Purchased_________________________________________________________________________

    Whenever you request replacement parts or information on this equipment, always supply the information youhave recorded above. The code number is especially important when identifying the correct replacement parts.

    CUSTOMER ASSISTANCE POLICYThe business of The Lincoln Electric Company is manufacturing and selling high quality welding equipment, consumables, and cutting equip-ment. Our challenge is to meet the needs of our customers and to exceed their expectations. On occasion, purchasers may ask LincolnElectric for advice or information about their use of our products. We respond to our customers based on the best information in our posses-sion at that time. Lincoln Electric is not in a position to warrant or guarantee such advice, and assumes no liability, with respect to such infor-mation or advice. We expressly disclaim any warranty of any kind, including any warranty of fitness for any customers particular purpose,with respect to such information or advice. As a matter of practical consideration, we also cannot assume any responsibility for updating or

    correcting any such information or advice once it has been given, nor does the provision of information or advice create, expand or alter anywarranty with respect to the sale of our products.

    Lincoln Electric is a responsive manufacturer, but the selection and use of specific products sold by Lincoln Electric is solely within the controlof, and remains the sole responsibility of the customer. Many variables beyond the control of Lincoln Electric affect the results obtained inapplying these types of fabrication methods and service requirements.

    Subject to Change This information is accurate to the best of our knowledge at the time of printing. Please refer to www.lincolnelectric.comfor any updated information.

    On-Line Product Registration- Register your machine with Lincoln Electric either via fax or over the Internet. For faxing: Complete the form on the back of the warranty statement included in the literature packet

    accompanying this machine and fax the form per the instructions printed on it. For On-Line Registration: Go to our WEB SITE at www.lincolnelectric.com. Choose Support and then Register

    Your Product. Please complete the form and submit your registration.

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    vivi TABLE OF CONTENTSPage

    Installation.......................................................................................................................Section A

    Technical Specifications.......................................................................................................A-1

    Safety Precautions. ..............................................................................................................A-2Location ........................................................................................................................A-2

    Stacking ........................................................................................................................A-2

    Input Wiring ...................................................................................................................A-2

    Reconnect Procedures ..........................................................................................A-3, A-4

    Output Connections ......................................................................................................A-5

    _______________________________________________________________________________Operation.........................................................................................................................Section B

    Safety Precautions ...............................................................................................................B-1

    Product Description ..............................................................................................................B-1

    To Set Polarity...............................................................................................................B-2

    Set-Up For Various Procedures....................................................................................B-2, B-3

    ________________________________________________________________________________

    Maintenance ....................................................................................................Section DSafety Precautions ...................................................................................................D-1

    General Maintenance .........................................................................................D-1Overload Protection ...........................................................................................D-1

    ________________________________________________________________________Troubleshooting..............................................................................................Section E

    Safety Precautions.................................................................................................E-1How to Use Troubleshooting Guide.......................................................................E-1

    Troubleshooting Guide.............................................................................E-2 thru E-7________________________________________________________________________

    Connection and Wiring Diagrams..................................................................Section F

    ________________________________________________________________________Parts List .........................................................................................P-146, P-720 Series

    ________________________________________________________________________

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    A-2INSTALLATION

    IDEALARC DC-1000

    A-2

    A permanent lifting eye is located at the top of the machine and

    is positioned so that it acts as nearly as possible through thecenter of gravity. This lift eye fits under the case of the second

    machine without interference when stacking.

    STACKING

    Two DC-1000s may be stacked by observing the following

    safety precautions:

    1. Make sure the first or bottom unit is setting on a level, well-supported surface.

    2. The units must be stacked with their fronts flush, making

    sure the two holes in the base rails of the top unit are overthe two pins located on top of the bottom unit.

    INPUT WIRING

    Be sure the voltage, phase and frequency of the input power isas specified on the welder nameplate.

    Dual voltage (e.g. 230/460) models are shipped connected forthe highest voltage. To change the connection, see the connec-

    tion diagram pasted to the inside of the access panel in thecase back.

    Have a qualified electrician remove the rear access panel and

    connect 3 phase AC power to terminals L1, L2 and L3 of the

    input panel in accordance with the U.S. National Electrical

    Code, all local codes and the wiring diagram located inside themachine.

    The welder frame must be grounded. A stud marked with thesymbol located inside the machine near the input panel is

    provided for this purpose. See the U.S. National Electrical Codefor details on proper grounding methods. (See Technical

    Specifications)

    SAFETY PRECAUTIONSRead this entire installation section before youstart installation.

    ELECTRIC SHOCK can kill. Only qualified personnel should

    perform this installation. Turn the input power OFF at thedisconnect switch or fuse boxbefore working on this equipment.Turn off the input power to anyother equipment connected to thewelding system at the disconnectswitch or fuse box before workingon the equipment.

    Do not touch electrically hot parts. Always connect the Power Wave grounding lug

    (located inside the reconnect input access door)to a proper safety (Earth) ground.

    -----------------------------------------------------------------------

    FALLINGEQUIPMENT can causeinjury.

    Do not lift this machine using lift bale ifit is equipped with a heavy accessorysuch as trailer or gas cylinder.

    Lift only with equipment of adequate lifting capacity. Be sure machine is stable when lifting.

    Do not stack more than two high. Do not stack the DC-1000 on top of any other

    machine.---------------------------------------------------------------------

    WARNING

    LOCATION

    Even though the machine is designed to operateunder a wide variety of environmental conditions, formaximum reliability and long life the machine should

    be located in a clean, dry place where there is free cir-culation of clean air in through the front and out the

    back of the machine. Dirt and dust that can be drawninto the machine should be kept to a minimum. Failure

    to observe these precautions can result in excessiveoperating temperatures and nuisance shutdown of the

    machine.

    The case front incorporates a recessed control panel

    which protects the controls and minimizes the possi-bilities of accidental contact. This cover panel can be

    flipped open to permit access to the enclosed controlsection.

    The individual case sides are removable for easyaccess for internal service or inspection.

    The case rear is equipped with a removable cover

    plate, permitting easy access to the input panel.

    The total enclosure, designed to permit outdoor operation,resists dust, salt, rain, humidity, and high and low temperatureextremes.

    The machine uses a 38 (965mm) long base. The low profile

    case facilitates installation of the machine under a workbenchand stacking the machines two high to conserve floor space.

    WARNING

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    A-3INSTALLATION

    IDEALARC DC-1000

    A-3

    RECONNECT PROCEDURE

    Multiple voltage machines are shipped connected tothe highest input voltage listed on the machines rating

    plate. Before installing the machine, check that theReconnect Panel in the Input Box Assembly is con-

    nected for the proper voltage.

    Failure to follow these instructions can causeimmediate failure of components within themachine.

    When powering welder from a generator be sureto turn off welder first, before generator is shutdown, in order to prevent damage to the welder.

    ------------------------------------------------------------------------------------------------------

    To reconnect a multiple voltage machine to a differentvoltage, remove input power and change the position

    of the reconnect board on the Reconnect Panel.Follow The Input Connection Diagram located on the

    inside of Case Back Input Access Door. These con-nection diagrams for the following codes are listed

    below.

    1. For Single and Dual Voltage except 380/500 seeFigure 1, (S17172).

    2. For 220/380/460, see Figure 2, (M14358).

    3. For 380/500, see Figure 3, (S17344).

    4. For Voltages not listed, see the Input ConnectionDiagram pasted on the inside of the CaseBack Input Access Door.

    CAUTION

    FIGURE 1

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    A-4INSTALLATION

    IDEALARC DC-1000

    A-4

    FIGURE 2

    FIGURE 3

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    A-5INSTALLATION

    IDEALARC DC-1000

    A-5

    OUTPUT CONNECTIONS

    Output Studs

    The output leads are connected to the output termi-

    nals. The output terminals are located on the lowercase front and labeled + and -. There are 1000amp rated + terminals on the right side, one 500

    amp rated + terminal near the center and - termi-nals on the left side. They are fully recessed to mini-

    mize the possibility of accidental contact by an objector a person. Strain relief is provided by the oval holes

    in the base. The leads are run through these ovalholes before they are connected to the output termi-nals.

    The 1000 amp output connections provide the full

    rated output range of the machine. See Table1 forrecommended DC-1000 cable sizes for combined

    lengths of electrode and work cables.

    The 500 amp output connections provide enhanced

    lower current arc characteristics, especially for sub-merged arc and GMAW procedures below 450 amps.

    Auxiliary Power

    This machine supplies the 115 volt, AC power needed

    for operating wire feeding equipment. The power isavailable from terminals #31 and #32 on the terminal

    strip. An 8 amp slow blow fuse on the machine controlpanel protects the auxiliary power from excessive

    overloads. The circuit has a 1000 volt-ampere rating.

    Control Cable Connection

    Terminal strips with screw connections are locatedbehind the hinged door on the front of the powersource to make all the control cable connections for

    operating wire feeding equipment. See the appropri-ate connection diagram for exact instructions covering

    the wire feeder being used.

    With the DC-1000 turned off, the control cable fromthe automatic wire feeding equipment is connected tothe terminal strip. A strain relief box connector is pro-

    vided for access into the terminal strip section. Achassis grounding screw is also provided below the

    terminal strip marked with the symbol for connect-ing the wire feeding equipment grounding wire. See

    the appropriate connection diagram for the exactinstructions for the wire feeder being used. A sparehole is provided for an additional box connector if

    required.

    Connecting for Air Carbon Arc:

    a. Turn off all power.b. Disconnect all wire feed unit control, electrode and

    work leads.

    c. Connect a jumper from 2-4 on terminal strip.d. Place mode switch in the CV(I) position.

    With the DC-1000 connected for air carbon arc weld-

    ing, the output terminals will be energized at all times.

    Cable SizeParallel CablesCable Length

    1/0 (53mm2)3

    3

    3

    Lengths up to 150 ft. (46m)

    2/0 (67mm2)150 ft.(46m) to 200 ft (61m)

    3/0 (85mm2)200 ft.(61m) to 250 ft.(76m)

    TABLE 1DC-1000 Cable Sizes for Combined Lengths of Copper Electrode and Work Cable

    at 100% Duty CycleELECTRODE, WORK AND #21 LEAD

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    B-1OPERATION

    IDEALARC DC-1000

    B-1

    PRODUCT DESCRIPTION

    The DC-1000 is an SCR-controlled three phase DCpower source. It is designed with a single rangepotentiometer control for submerged arc or open arcautomatic and semiautomatic welding. It can be usedfor air carbon arc cutting with carbon rods up to andincluding 5/8 (15.9mm) dia. The DC-1000 (belowcode 9500) is not recommended for stick welding orfor solid wire and gas in the short arc welding mode.With the addition of the 500 amp output stud to DC-1000 models above code 9500, GMAW procedurescan be performed. This connection provides the

    enhanced lower current arc characteristics requiredfor this type of welding.

    The DC-1000 is provided with a three position modeswitch that selects CVInnershield, CV SubmergedArc or CC (Variable Voltage) Submerged Arc.

    The unit is designed to be used with the NA-5, NA-5Rand NA-3 automatics, the LT-56 and LT-7 tractors,and can also be used with the LN-7, LN-8 or LN-9semiautomatic wire feeders.

    NOTE: All P.C. boards are protected by a moistureresistant coating. When the welder is operated, this

    coating will bake off of certain power resistors thatnormally operate at high temperatures emitting some

    smoke and odor for a short time. These resistors andthe P.C. board beneath them may become blackened.This is a normal occurrence and does not damage the

    component or affect the machine performance.

    TO SET POLARITYTurn off the DC-1000 and connect the electrode cableto the Positive or Negative studs depending upon

    the electrode polarity desired. Connect the work cableto the other stud. (See Output Connections).

    Set the Electrode Negative-Electrode Positive switchto correspond to the polarity of the electrode cable

    connection. This switch setting is necessary for properoperation of some Lincoln wire feeders and does not

    change the welding polarity.

    Starting the Machine - The push button power onswitch at the extreme right side of the control panelenergizes and closes the three phase input contactor

    from a 115 volt auxiliary transformer. This in turn ener-gizes the main power transformer.

    The red light below the stop-start button indicates

    when the input contactor is energized.

    Output Control - The output control in the center ofthe control panel is a continuous control of themachine output. The control may be rotated from min.

    to max. while under load to adjust the machine output.

    The machine is equipped with line voltage compensa-tion as a standard feature. This will hold the output rel-atively constant except at maximum output of the

    machine, through a fluctuation of +/- 10% of input linevoltage.

    Output Control at DC-1000 or Output ControlRemote Switch

    The toggle switch on the control panel labeled Output

    Control at DC-1000 / Output Control Remote givesthe operator the option of controlling the output at the

    machine control panel or at a remote station. Forremote control, the toggle switch is set in the Output

    Control Remote position and controlled at the wirefeed unit control or by connecting a K775 control to

    the appropriate terminals (as indicated on the connec-tion diagram) on the terminal strip at the front of themachine. For control at the machine control panel, the

    toggle switch is set in the Output Control at DC-1000position.

    OPERATING INSTRUCTIONS

    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 danger-ous. Keep your head out of fumes. Use ventilation or exhaust to removefumes from breathing zone.

    ------------------------------------------------------------------------WELDINGSPARKScan cause fire orexplosion. Keep flammable material away. Do not weld on closed containers.

    ------------------------------------------------------------------------

    ARCRAYS can burn eyes and skin. Wear eye, ear and bodyprotection.

    ------------------------------------------------------------

    See additional warning information atfront of this operators manual.

    -----------------------------------------------------------

    WARNING

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    B-2INSTALLATION

    IDEALARC DC-1000

    B-2

    Remote Output Control - (Optional)

    The K775 Remote Output Control consists of a controlbox with 28 ft. (8.4m) of four conductor cable. This

    connects to terminals 75, 76, 77 on the terminal strip,and the case grounding screw so marked with thesymbol on the machine. These terminals are

    made available by opening the terminal access coveron the left side of the case front. This control will give

    the same control as the output control on themachine.

    Mode Switch

    The toggle switch labeled C (I) Innershield, CV(S)Submerged Arc, CC (or Variable Voltage) is used to

    select the proper welder characteristics for theprocess being used. The CC (or Variable Voltage)

    mode is primarily available for use with older wirefeeding equipment such as the LAF-3, LT-34 and soforth. Use of this type of older equipment requires the

    addition of an NLOption Kit.

    SET-UP FOR VARIOUS PROCEDURES

    1. Selection of mode switch position - There areseveral general rules to follow in the selection ofthe mode switch position.

    a. Use the CV(I) mode for all FCAW and GMAWprocesses. The CV(I) mode is also used for

    air carbon arc using carbon rods up to andincluding 5/8 (15.9mm) dia.

    Welding with NR-151, 202, 203 and otherelectrodes below 20 volts, is not recommend-ed.

    b. Use the CV(S) mode for all submerged arcwelding. This applies to both low and high

    travel speeds.

    c. The CC (Variable Voltage) mode is availablefor high current large puddle submerged arcprocedures that cannot be done as well with

    the constant voltage mode. CC mode shouldbe used for 3/16 (4.8mm) diameter electrode

    and above where high current surges causemachine shutdown when starting. This occurs

    primarily when the slag ball is not cut from theelectrode prior to starting. (Also requires a

    wire feeder that has a constant current mode- i.e. NA-3S).

    NOTE: Some processes and procedures may be bet-ter with the mode switch in the other CV position. If

    the mode switch position initially selected is not pro-ducing the desired results, then place the mode switch

    in the other CV position and make a test weld. Thenuse the CV mode switch position that gives thedesired results.

    2. NA-3 - The NA-3 should be set for the mode beingused on the power source. If using either of theCV modes, the NA-3 CC board switch should be

    set for CV. If the power source is used in the CCmode, then the NA-3 CC board mode switchshould be placed in the CC position.

    All the NA-3s when used with the DC-1000 are capa-

    ble of cold starting with the constant current boardmode switch in CC. Cold starting permits the wire to

    be inched down to the work, automatically stop, andautomatically energize the flux hopper valve. All NA-3s made after September, 1976 are capable of cold

    starting on either CV or CC settings of the constantcurrent board.

    On the NA-3, set the open circuit voltage control to the

    same dial setting as the arc voltage control. If the pro-cedure has not yet been established, a good startingpoint is to set the OCV to #6.

    Run a test weld, setting the proper current, voltage

    and travel speed. Once the proper welding procedureis established and if the start is poor - wire blast off,

    stub, etc. - adjust the NA-3 OCV and inch speed con-trols for optimum starting. In general, a low inch speed

    and an OCV dial setting identical to the voltage dialsetting will provide the best starting.

    To further optimize starting, adjust the OCV by makingrepeated starts and observing the NA-3 voltmeter

    action. With proper adjustment of the OCV control, thevoltmeter needle will swing smoothly up to the desired

    arc voltage and thus provide repeatable starts.

    If the voltmeter swings above the set voltage and then

    back to the desired welding voltage, the OCV settingis too high. This usually results in a bad start where

    the wire tends to blast off.

    If the voltmeter needle hesitates beforecoming up tothe desired voltage, the OCVis set too low. This willcause the electrode to stub.

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    B-3INSTALLATION

    IDEALARC DC-1000

    B-3

    3. NA-5 - Set the DC-1000 mode switch to theprocess being used - CV(I) Innershield or CV(S)

    Sub Arc. Set the DC-1000 machine/remote switchin the remote position. Set the OCV control four

    volts higher than the welding voltage and the inchspeed at 1/2 the welding wire feed speed for theinitial test weld. Adjust the OCV and inch speed as

    required for optimum starting. Refer to the NA-5instruction manual for data regarding the setup of

    controls and modes on the NA-5.

    4. LN-8 - Set the LN-8 mode switch (located on theCC board) to the CV position. Set the DC-1000mode switch on CV(I) Innershield or CV(S)Sub

    Arc according to the process being used.

    5. LN-7, LN-9 and other constant wire feed units -Set the DC-1000 mode switch on CV(I) Innershieldor CV(S) Sub Arc according to the process beingused. If using an LN-9, refer to the LN-9 instruction

    manual for further instructions on its use. If usingan LN-7, it will be necessary to use either a K775

    Remote Control or operate the DC-1000 with themachine/remote switch in the machine position.

    NLOption Kit (Not Required with NA-3, NA-5, LT-7or LT-56).

    The K783 NL Option Kit (for field installation) is

    designed to permit use of the obsolete NA-2, LAF-3,LT-3 and LT-3 section of the LT-34 tractor. It provides

    the necessary DC control power for the operation ofthe equipment and the necessary circuitry for properinching, cold starting and arc striking. In using the NL

    Option Kit, a K775 remote field control is required and

    is included as part of the kit. Installation instructionsare included with the NL Option Kit.

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    D-1MAINTENANCED-1

    The control board is designed with adequate protec-tion so that no damage will occur if the remote control

    leads are shorted together or are grounded to thecase. The machine will automatically shut down if

    such faults do occur.

    An 8-amp fuse located on the machine control panelprotects the 115 volt auxiliary AC circuit (#31 and #32)

    from overload. If replacing, use the same type andsize fuse.

    IDEALARC DC-1000

    SAFETY PRECAUTIONS

    ELECTRIC SHOCK can kill.

    Only q ualified personnel shouldperform this installation.

    Turn the input power OFF at the

    disconnect switch or fuse box beforeworking on this equipment.

    Do not touch electrically hot parts.------------------------------------------------------------------------

    GENERAL MAINTENANCE

    1. The fan motors have sealed bearings whichrequire no service.

    2. In extremely dusty locations, dirt may clog the air

    channels causing the welder to run hot. Blow outthe welder with low pressure air at regular inter-

    vals as required to eliminate excessive dirt anddust buildup on internal parts.

    OVERLOAD PROTECTION

    The power source is thermostatically protected with

    two proximity thermostats against overload or insuffi-cient cooling. One thermostat is located on the trans-

    former secondary Negative Output Lead, and theother thermostat is located on the choke coil. Thethermostats are connected in series in the machine

    control circuit so that if an excessive overload isapplied to the machine, or the machine should receive

    insufficient cooling on either the main transformer,SCR bridge assembly or choke, the input contactor

    would open and remain open until the machine cools.It can then be manually restarted by operating thestart push button.

    The power source is also protected against heavy

    overloads on the SCR bridge assembly through anelectronic protection circuit. This circuit senses an

    overload on the power source and opens the inputcontactor should the overload remain for a predeter-mined time. The predetermined time varies with the

    amount of overload; the greater the overload, the

    shorter the time. The input contactor will remain openuntil the power source is manually started with thestart push button.

    WARNING

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    E-1TROUBLESHOOTINGE-1

    IDEALARC DC-1000

    If for any reason you do not understand the test procedures or are unable to perform the tests/repairs safely, contact yourLocal Lincoln Authorized Field Service Facility for technical troubleshooting assistance before you proceed.

    CAUTION

    This Troubleshooting Guide is provided to help youlocate and repair possible machine malfunctions.

    Simply follow the three-step procedure listed below.

    Step 1. LOCATE PROBLEM (SYMPTOM).

    Look under the column labeled PROBLEM (SYMP-

    TOMS). This column describes possible symptoms

    that the machine may exhibit. Find the listing thatbest describes the symptom that the machine isexhibiting.

    Step 2. POSSIBLE CAUSE.

    The second column labeled POSSIBLE CAUSE lists

    the obvious external possibilities that may contributeto the machine symptom.

    Step 3. RECOMMENDED COURSE OF ACTION

    This column provides a course of action for thePossible Cause, generally it states to contact your

    local Lincoln Authorized Field Service Facility.

    If you do not understand or are unable to perform theRecommended Course of Action safely, contact your

    local Lincoln Authorized Field Service Facility.

    HOW TO USE TROUBLESHOOTING GUIDE

    Service and Repair should only be performed by Lincoln Electric Factory Trained Personnel.Unauthorized repairs performed on this equipment may result in danger to the technician and

    machine operator and will invalidate your factory warranty. For your safety and to avoid ElectricalShock, please observe all safety notes and precautions detailed throughout this manual.

    __________________________________________________________________________

    WARNING

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    E-2TROUBLESHOOTINGE-2

    IDEALARC DC-1000

    Observe all Safety Guidelines detailed throughout this manual

    If for any reason you do not understand the test procedures or are unable to perform the tests/repairs safely, contact your

    Local Lincoln Authorized Field Service Facility for technical troubleshooting assistance before you proceed.

    CAUTION

    PROBLEMS(SYMPTOMS)

    POSSIBLECAUSE

    RECOMMENDEDCOURSE OF ACTION

    Input contactor (1CR) chatters.

    Machine input contactor does not oper-

    ate.

    Input contactor pulls in when start button

    is pressed, but immediately drops out.

    Machine input contactor operates but no

    output when trying to weld.

    1. Faulty input contactor (1CR).

    2. Low line voltage.3. Faulty 2CR relay.

    1. Supply line fuse blown.

    2. Contactor power circuit dead.

    3. Broken power lead.

    4. Wrong input voltage.

    5. Secondary or choke thermostat open.

    6. Open input contactor coil.

    7. Faulty stop/start push button switch.8. Faulty 2CR relay.

    9. Defective control board.

    1. Defective start/stop push button.2. Defective 1CR interlock.

    3. Ground fault between control termi-nals 73, 74, 75, 76 or 77 and nega-

    tive output terminal.4. Short on output terminals with 2-4

    jumpered.

    5. Defective control board.

    1. Electrode or work lead loose or bro-

    ken.

    2. Open main transformer (T1) primary

    or secondary circuit.3. Output pilot relay 4CR not operating

    or faulty.

    4. Firing circuit P.C. board not connect-

    ed or is faulty.

    5. If using 500 amp stud, choke circuitmay be open.

    1. Repair or replace.

    2. Check input power.3. Repair relay.

    1. Replace if blown - look for reason

    first.2. Check pilot transformer T2 and asso-

    ciated leads.3. Check input voltage at contactor.

    4. Check voltage against instructions.

    5. Check for overheating; make sure fanis operating and there is no obstruc-

    tion to free air flow. Replace faultythermostat.

    6. Replace coil.

    7. Replace switch.8. Replace relay.

    9. Replace control board. See P.C.board troubleshooting guide.

    1. Check and replace if necessary.2. Repair or replace.

    3. Check 73, 74, 75, 76 or 77 for groundto negative output circuit.

    4. Remove short.

    5. Replace control board. See P.C.board troubleshooting guide.

    1. Repair connection.

    2. Repair.

    3. Check relay pull-in by connecting ajumper across terminals 2 and 4 on

    DC-1000 terminal strip. Replace if

    faulty.4. All nine light emitting diodes (LED1

    thru LED9) must be lit. See P.C.board troubleshooting guide.

    5. Repair.

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    E-4TROUBLESHOOTINGE-4

    IDEALARC DC-1000

    Observe all Safety Guidelines detailed throughout this manual

    If for any reason you do not understand the test procedures or are unable to perform the tests/repairs safely, contact your

    Local Lincoln Authorized Field Service Facility for technical troubleshooting assistance before you proceed.

    CAUTION

    PROBLEMS(SYMPTOMS)

    POSSIBLECAUSE

    RECOMMENDEDCOURSE OF ACTION

    Output control not functioning on remote

    control.

    Poor starting on CV(S) Sub-Arc.

    Poor bead shape or erratic arc on CV(S)Sub-Arc.

    Poor starting on CV(I) Innershield and

    CV(S) Sub-Arc.

    Poor arc characteristics on CV(I)Innershield or other open arc processes.

    Poor arc characteristics on all process-es.

    Poor performance (including arc out-

    ages) while welding at low current (lessthan 450 amps) when connected to 1000

    amp + output studs.

    Machine frequently shuts off while using

    the 500 amp + output stud.

    1. Output control switch in wrong posi-

    tion.2. Faulty output control switch.

    3. Faulty remote control potentiometer.

    4. Leads or connections open in controlcircuit.

    5. Faulty firing or control circuit P.C.

    board.

    1. Improper procedures or setting of

    controls.

    2. Poor electrode or work connection.3 3CR reed switch inoperative.

    4 Faulty control board.

    1. Improper procedures.

    2. Defective 3CR reed switch.

    3. Faulty control board.

    4. Defective main SCR bridge.

    1. Defective 3CR reed switch.

    2. Faulty control board.

    1. Mode switch in CV(S) Sub-Arc mode.

    2. Defective main SCR bridge.

    1. Defective control board.

    2. Defective firing board.

    3. Defective main SCR bridge.

    1. Insufficient output inductance.

    1. Effective current demand well over

    500 amperes.

    1. Place switch in Output Control

    Remote.2. Check and replace if found faulty.

    3. Check and replace if found faulty.

    (Voltage from 75 to 77 should be 3 to5V).

    4. Check all leads and connections,internal or remote, for continuity;

    repair if necessary.5. All light emitting diodes must be lit on

    both P.C. boards, except LED4 on

    control/fault board. See P.C. boardtroubleshooting guide.

    1. See instruction manual and proce-

    dures.

    2. Repair connections.3. Check reed switch voltage leads 216

    to 220. Idle voltage is about 8V; whenwelding, voltage must go to zero.

    4. Replace. See P.C. board trou-bleshooting guide.

    1. See instruction manual and proce-dures.

    2. Check reed switch per item c. of pre-vious Table above.

    3. Replace. See P.C. board trou-

    bleshooting guide.4. Check and replace if defective.

    1. Replace.

    2. Replace.

    1. Place mode switch in CV(I)Innershield mode.

    2. Check and replace if defective.

    1. Check and replace if defective. SeeP.C. board troubleshooting guide.

    2. Check and replace if defective. SeeP.C. board troubleshooting guide.

    3. Check and replace if defective.

    1. Use the 500 amp + output stud.

    1. Use the 1000 amp + output studs.

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    E-5TROUBLESHOOTINGE-5

    IDEALARC DC-1000

    Observe all Safety Guidelines detailed throughout this manual

    If for any reason you do not understand the test procedures or are unable to perform the tests/repairs safely, contact your

    Local Lincoln Authorized Field Service Facility for technical troubleshooting assistance before you proceed.

    CAUTION

    P.C. BOARD TROUBLESHOOTING GUIDE

    ELECTRICSHOCK can kill. Have an electrician install and service

    this equipment. Turn the input power off at the fuse

    box before working on equipment. Do not touch electrically hot parts.---------------------------------------------------------------------

    WARNING

    Machine settings for P.C. board troubleshooting.

    Disconnect all leads to the wire feeder and jumper ter-minals #2 and #4 on DC-1000. Output Control at DC-

    1000. Mode switch in the CV(I) position.

    CONTROL/FAULT PROTECTION P.C.BOARD

    1. LED1 indicates AC input voltage is present at pins255-256. If not lit, check the voltage across thesecondary winding of the control transformer, T2.

    The voltage should be approximately 115 volts. Ifnot, the problem is in the power supply and not theP.C. board.

    2. LED2 indicates welder output voltage is being sup-

    plied to the control circuit. If not lit, check to makecertain lead 222 from pin 2 of the 15-pin control

    circuit P.C. board connector is connected to thepower source negative output lead and is not bro-ken.

    3. LED3 indicates power is being applied to fault pro-tection pilot relay 2CR to turn on the input contac-

    tor.

    4. LED4 indicates when overcurrent protection circuitis being activated.

    5. LED5 indicates a control signal is being suppliedto the firing circuit. As the output control is varied,

    LED5 should change brilliancy from bright at lowoutput to dim at high output.

    FIRING CIRCUIT P.C. BOARD

    All nine light emitting diodes must be lit when thepower source is turned on and the wire feed arc startbutton is pressed or a jumper is connected between 2

    and 4.

    1. Lights 7, 8, and 9 indicate AC power being sup-

    plied to the P.C. boards from T1 auxiliary winding.If a light is not lit, turn the machine off and unplug

    P5 from J5 on the firing P.C. board. Turn themachine on and check the following voltages:

    I f approximately 75 VAC is present, turn themachine off, plug P5 back into firing board. Turn

    the machine back on and check to see if the lightor lights are on. If the light or lights are not on

    replace the firing P.C. board.

    If the 75 VAC was not present, then check the

    wiring.

    2. Lights 1 through 6 indicate gate signals are beingsupplied to the main power SCR s 1 through 6

    respectively. If light 5 on the control circuit andlights 7 through 9 on the firing circuit are lit andlights 1 through 6 are not lit, check lead 231

    between the firing circuit and the control circuit

    that it is not broken and is connected to eachMolex connector. If the lead shows continuity andlights 1 through 6 are not lit, replace the firing cir-

    cuit P.C. board. If any one of the lights 1 through 6is not lit and lights 7 through 9 are lit, replace thefiring circuit P.C. board.

    Light That Check AC Voltage Voltage ShouldWas Off Between Pins of Be Approx.

    Plug P5

    7 P5 Pins 2 & 4 75 VAC(Wires 203, 204)

    8 P5 Pins 7 & 3 75 VAC(Wires 205, 206)

    9 P5 Pins 9 & 8 75 VAC(Wires 207, 208)

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    E-6TROUBLESHOOTINGE-6

    IDEALARC DC-1000

    Observe all Safety Guidelines detailed throughout this manual

    If for any reason you do not understand the test procedures or are unable to perform the tests/repairs safely, contact your

    Local Lincoln Authorized Field Service Facility for technical troubleshooting assistance before you proceed.

    CAUTION

    PROCEDURE FOR REPLACING P.C.BOARDS

    When P.C. board is to be replaced, the following pro-cedure must be followed:

    1. Visually inspect P.C. board in question. Are any of

    the components damaged? Is a conductor on theback side of the board damaged? All P.C. boardsare protected by a moisture resistant coating.

    When the welder is operated, this coating willbake off of certain power resistors that normally

    operate at high temperatures emitting somesmoke and odor for a short time. These resistors

    and the P.C. board beneath them may becomeblackened. This is a normal occurrence and doesnot damage the component or affect the machine

    performance.

    a. If there is no damage to the P.C. board, insert

    a new one and see if this remedies the prob-lem. If the problem is remedied, replace theold P.C. board and see if the problem stillexists with the old P.C. board.

    1) If the problem is no longer present with the

    old board, check the P.C. board harnessplug and P.C. board plug for corrosion,

    contamination, or oversize.2) Check leads in the harness for loose con-

    nections.

    b. If there is damage to the P.C. board, refer to

    the Troubleshooting Guide

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    E-7TROUBLESHOOTINGE-7

    IDEALARC DC-1000

    If for any reason you do not understand the test procedures or are unable to perform the tests/repairs safely, contact your

    Local Lincoln Authorized Field Service Facility for technical troubleshooting assistance before you proceed.

    CAUTION

    MACHINE HAS OUTPUT(Jumper 2-4) BUT TRIPS

    OFF IMMEDIATELY

    CHECK FOR SHORT CHECK LEADSBETWEEN ELECTRODE AND 73, 74, 75, 76, 77 FOR

    WORK LEADS, REMOVE GROUND TO

    EXTERNAL LEADS FROM NEGATIVE OUTPUTTHE OUTPUT TERMINALS TERMINAL

    IF TROUBLE STILL PERSISTS,CHECK LED 3 ON

    CONTROL BOARD

    IF LIGHT GOES ON, THENQUICKLY OUT WHEN START

    BUTTON IS PRESSED,

    CONTROL BOARD ISDEFECTIVE AND SHOULD

    BE REPLACED

    ERRATIC WELDING

    CHECK PROCEDURE

    CHECK MODE SWITCH FOR PROPER POSITION FORPROCESS BEING USED

    CHECK LEDS 1 THRU 6 FOR EQUAL BRILLIANCY

    IF LIGHTS ARE NOT ALL APPROXIMATELY EQUALLY

    BRIGHT, REPLACE FIRING P.C. BOARD

    OUTLINE FOR DC-1000 TROUBLESHOOTING GUIDE

    If troubleshooting guide indicates a possible P.C.board problem, the following guide can be used to

    locate the problem.

    NO WELDER OUTPUT (INPUT CONTACTOR ON. 2 AND 4 CLOSED)

    CHECK CONTROL BOARD

    LED5

    IF OFF

    CHECK LED1

    IF ON

    CHECK FIRING BOARD

    LEDS

    ALLNINE LIGHTS

    SHOULDBE ON

    IF OFF IF ON

    CHECK AC REPLACEINPUT TO CONTROL

    CONTROL BOARDBOARD -

    POSSIBLEDEFECTIVE

    T2 TRANSFORMER

    IF YES IF NO

    CHECK GATE LEAD CHECK LIGHTS

    CONNECTIONS 7,8,9TO SCRS

    IF ONE IF ON ANDOR MORE OTHER LIGHTSARE OUT ARE OUT

    CHECK AC INPUT

    TO BOARD, REPLACE203-204, 205-206 FIRING

    207-208 -- POSSIBLE BOARD

    DEFECTIVEAUXILIARY

    WINDINGS ON MAINTRANSFORMER

    CHECK FOR OPEN

    IN LEADS 203, 204205, 206, 207, 208

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    F-1DIAGRAMSF-1

    IDEALARC DC-1000

    CONNECTION OF DC-1000 WITH NL OPTION KIT TO LAF-3 (Obsolete)

    N.A. On all DC-1000 and DC-1500 unitswith codes above 8234 extend lead67 and connect it to the electrodecable going to the automatic equip-

    ment.

    N.B. On DC-1500 units below code 8234this is 67 and the LAF-3 #67 lead canbe connected either to the #67 termi-nal or the electrode cable terminal asshown. Terminal 82 not present onlater D.C. 1500s and all DC-1000s.

    N.C. Terminals 73 and 74 not present onearlier DC-1500s.

    N.D. Alternative 500 amp positive terminalconnection provided on DC-1000models above code 9500 only.

    This diagram shows the electrode connect-ed positive. To change polarity, turn powersource off, reverse the electrode and workleads at the power source and position theswitch on the power source and NL OptionKit to the proper polarity. Also reverse theleads on the back of the ammeter and volt-meter in the LAF-3 control box.

    Contactor drop out delay switch on the NLOption Kit must be in the On position.

    The 4/0 cables shown will handle up to1000 amps at 80% duty cycle. For highercurrents or duty cycle add additional cablesto the power source output studs.

    For best arc striking when connected to anLAF-3 make the following change insidethe LAF-3 control unit. Remove the bluejumper lead connected between #1 on thecoil of the main relay and #7 on the coil ofthe transfer relay. (The main relay is theupper right relay when facing the left end ofthe control box. The transfer relay is just tothe left of the main relay.)

    S171768-2-90F

    CONNECTION OF DC-1000 TO LN-8

    Connect the control cable ground lead to the frame terminalmarked near the power source terminal strip. The powersource must be properly grounded.

    *If using an older control cable: Connect lead #75 to #75 on ter-minal strip, connect lead #76 to #76 on terminal strip, connectlead #77 to #77 on terminal strip.

    N.A. Welding cables must be of proper capacity for the currentand duty cycle of immediate and future applications.

    N.B. Extend lead 21 using #14 or larger insulated wire physi-cally suitable for the installation. An S16586-[ ] remotevoltage sensing work lead is available for this purpose.Connect it directly to the work piece keeping it electricallyseparate from the welding work lead circuit and connec-

    tion. For convenience, this extended #21 lead should betaped to the welding work lead.

    N.C. Tape up bolted connection.

    N.D. Alternative 500 amp positive terminal connection providedon DC-1000 models above code 9500 only.

    Above diagram shows electrode connected positive. To changepolarity, turn power source off, reverse the electrode and workleads at the power source and position the switch on powersource to proper polarity.

    82 21 4 2 31 32

    77767574

    73

    67 21 4 2 31 3 2 75 76 77

    N.C.POWER SOURCE

    N.B.

    N.A. NEGATIVE POSITIVE

    N.D.

    TO WORK

    ELECTRODE CABLE TO

    AUTOMATIC EQUIPMENT

    35 VOLT CONTROL

    EXCITER

    21 1

    6 4 2 1 10 21 32 31 18 45 29 5

    TAPE UP LEADS

    NOT USED

    K775 REMOTE CONTROL

    MOUNTED AT LAF-3

    TO LAF-3

    CONTROL BOX

    CONNECT THE RED LEAD TO

    TERMINAL 22

    75

    76

    77

    75

    76

    77

    GND

    22

    31

    32

    21

    10

    1

    2

    4

    NL OPTION

    106

    E D

    F C

    2 1 4 2 3 1 3 2 7 3 7 4 7 5 7 6 7 7

    4

    G

    N

    D

    P O W E R S O U R C E

    N E G A T I V E P O S I T I V E

    2 1

    N . A .

    E L E C T R O D E C A B L E T O

    T O W O R K }

    T O L N - 8 I N P U T

    C A B L E P L U G

    C O N T R O L C A B L E

    3 2

    3 1

    2

    C

    B

    A }*

    W I R E F E E D U N I T

    N . D .

    N . B . &

    N . C .

    M13321

    8-2-90F

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    F-2DIAGRAMSF-2

    IDEALARC DC-1000

    CONNECTION OF DC-1000 WITH NL OPTION KIT TO LT-3 or LT-34 (Obsolete)

    N.A. On all DC-1000 and DC-1500sabove Code 8234 extend lead 67and connect it to the electrode cablegoing to the automatic equipment.

    N.B. On DC-1500 units below code 8234this is #67 and the LT-3 or LT-34 #67lead can be connected either to the#67 or the electrode cable terminalas shown. Terminal 82 not presenton later D.C. 1500s and all DC-1000s.

    N.C. Terminals 73 & 74 not present onearlier DC-1500s.

    N.D. Alternative 500 amp positive terminal

    connection provided on DC-1000models above code 9500 only.

    This diagram shows the electrode connect-ed positive. To change polarity, turn powersource off, reverse the electrode and workleads at the power source and position theswitch on the power source and NL OptionKit to the proper polarity. Also reverse theleads on the back of the ammeter and volt-meter in the LT-3 control box.

    Contactor drop out delay switch on the NLOption Kit must be in the On position.

    The 4/0 cables shown will handle up to

    1000 amps at 80% duty cycle. For highercurrents or duty cycle add additional cablesto the power source output studs.

    CONNECTION OF DC-1000 OR DC-1500 to NA-3, LT-5 or LT-7Connect the control cable ground lead to the frame terminal

    marked near the power source terminal strip. Thepower source must be properly grounded.

    *If using an older control cable: Connect lead #75 to #75 on termi-nal strip, connect lead #76 to #76 on terminal strip, connect lead#77 to #77 on terminal strip.

    N.A. Welding cables must be of proper capacity for the currentand duty cycle of immediate and future applications.

    N.B. Extend lead 21 using #14 or larger insulated wire physicallysuitable for the installation. An S16586-[ ] remote voltagesensing work lead is available for this purpose. Connect itdirectly to the work piece keeping it electrically separate fromthe welding work lead circuit and connection. For conve-nience, this extended #21 lead should be taped to the weld-

    ing work lead.

    N.C. Tape up bolted connection.

    N.D. Terminals 73 & 74 not present on earlier DC-1500.

    N.E. Alternative 500 amp positive terminal connection providedon DC-1000 models above code 9500 only.

    Above diagram shows electrode connected positive. To changepolarity, turn power source off, reverse the electrode and workleads at the power source and position the switch on powersource to proper polarity. Also reverse the leads on the back ofthe ammeter and voltmeter in the automatic control box.

    TO WORK

    LT-3 REMOTE

    DC CONTROL

    BOX

    ELECTRODE CABLE TO

    AUTOMATIC EQUIPMENT

    N.D.

    NEGATIVE POSITIVEN.A.

    N.B.

    POWER SOURCE

    N.C.

    73 74 75 76 778 2 2 1 4 2 31 32

    67 21 4 2 31 32 75 7677

    35 VOLT CONTROL

    EXCITER 21 1

    CF

    E D

    106

    7576

    77

    GND

    75

    76

    77

    1

    4

    2

    10

    21

    32

    31

    22

    BOLT & TAPE

    7 CONNECTIONS

    4142 43 4458 59 616 10 4 21 1 2 31

    SPARE

    TAPE UP SPARE LEADS (NOT USED)

    2 1 32 3129 5

    41 4 2 43 4 4 58 59 61

    NL OPTION

    CONNECT THE RED LEAD TO

    TERMINAL 22

    K-775 REMOTE CONTROL

    MOUNTED AT TRACTOR

    TO LT-3 TRACTOR

    CONTROL BOX

    2 1 4 2 3 1 3 2 7 3 7 4 7 5 7 6 7 7

    4

    G

    N

    D

    P O W E R S O U R C E

    N E G A T I V E P O S I T I V E

    2 1

    N . A .

    E L E C T R O D E C A B L E T O

    T O W O R K

    }

    C O N T R O L C A B L E

    3 2

    3 1

    2

    C

    B

    A }*

    N . B . &

    N . C .

    T O A U T O M A T I C

    C O N T R O L B O X

    N . D .

    N . E .

    A U T O M A T I C E Q U I P M E N T

    }

    M13322

    8-2-90F

    S155348-2-90F

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    F-3DIAGRAMSF-3

    IDEALARC DC-1000

    CONNECTION OF DC-1000 to NA-5

    N.A. Welding cables must be of proper capacity for the cur-rent and duty cycle of immediate and future applica-tions.

    N.B. Extend lead 21 using #14 or larger insulated wire phys-ically suitable for the installation. An S16586-[ ] remotevoltage sensing work lead is available for this purpose.Connect it directly to the work piece keeping it separatefrom the welding work cable connection to work piece.

    For convenience, this extended #21 lead should betaped along the welding work cable.

    N.C. Tape up bolted connection.

    N.D. Connect the NA-5 control cable ground lead to theframe terminal marked near the power source ter-minal strip. The power source must be properly ground-ed.

    N.E. If using an older automatic control cable with leads 75,76, 77: Connect lead 75 to #75 on terminal strip, con-nect lead #76 to #74 on terminal strip, connect lead#77 to #73 on terminal strip.

    N.F. Connect the jumpers on the NA-5 voltage board as fol-

    lows: Connect RED jumper to pin S, Connect WHITEjumper to pin B.

    N.G. Set the DC-1000 or DC-1500 controls as follows: Setthe control switch to Output Control Remote. ForSubmerged Arc Processes set the switch to C.V.Submerged Arc. For Open Arc Processes, set themode switch to C.V. Innershield.

    N.H. For proper operation, the electrode cable mustbesnugged under the clamp bar on the left side of the NA-5 control box.

    N.J. Terminals #73 and #74 were not present on DC-1500machines below code 8294. These earlier codemachines are not suitable for use with the NA-5.

    N.K. Alternative 500 amp positive terminal connection pro-vided on DC-1000 models above code 9500 only.

    N.L. Alternate submerged arc mode available for improvedarc stability in high current, large puddle, slow travelprocedures by making special connections on both DC-1500 and NA-5.

    On DC-1500 Control Board (G1530-2 and superseding)remove red and blue jumpers from FR pins and reconnectto corresponding SR pins.

    On NA-5 Voltage Board (G1556-1 and superseding) whitejumper must be connected to pin D.

    NA-5 pin D connection may also be used for some proce-dures on DC-1500 without control board jumpers, DC-1500with control board jumpers on FR pins or DC-1000.

    Above diagram shows electrode connected positive. To changepolarity turn power off, reverse the electrode and work leads atthe power source, position the positive - negative switch on thepower source to correspond to the polarity of the electrode cableconnection. Refer to NA-5 operating manual for required NA-5control box polarity connections.

    2 1 4 2 3 1 3 2 7 3 7 4 7 5 7 6 7 7

    4

    G

    N

    D

    N E G A T I V E P O S I T I V E

    2 1

    N . A .

    C O N T R O L C A B L E

    3 2

    3 1

    2

    C

    B

    A

    }

    }

    T O N A - 5 I N P U T

    C A B L E P L U GN . J . N . F .

    N . F .N . E .

    N . K .

    C O N T A C T A S S E M B L Y

    F R O M N A - 5 W I R E

    N . B . & N . C .

    B O L T T O C A B L E S

    N . D .

    C O N N E C T T O W O R K

    N . C . & N . H .

    S168898-2-90F

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    F-4DIAGRAMSF-4

    IDEALARC DC-1000

    CONNECTION OF DC-1000 TO LN-7

    CONNECTION OF DC-1000 TO LN-9

    N.A. Welding cables must be of proper capacity for the current andduty cycle of immediate and future applications.

    N.B. Extend lead 21 using #14 or larger insulated wire physically suit-able for the installation. An S16586-[ ] remote voltage sensingwork lead is available for this purpose. Connect it directly to thework piece keeping it electrically separate from the welding worklead circuit and connection. For convenience, this extended #21lead should be taped to the welding work lead. (This extended

    #21 lead connection replaces the need to employ the remotework lead accessory on LN-7 meter kits which have a direct worklead jack. An LN-7 not equipped with a meter kit does not requirelead 21 to be extended.)

    N.C. Tape up bolted connection.

    N.D. Connect the control cable ground lead to the frame terminalmarked near the power source terminal strip. The powersource must be properly grounded.

    N.E. Terminal strip for remote voltage control pot. when used.

    N.F. Alternative 500 amp positive terminal connection provided onDC-1000 models above code 9500 only.

    N.A. Welding cables must be of proper capacity for the current andduty cycle of immediate and future applications.

    N.B. Extend lead 21 using #14 or larger insulated wire physically suit-able for the installation. An S16586-[ ] remote voltage sensingwork lead is available for this purpose. Connect it directly to thework piece keeping it separate from the welding work cable con-

    nection to work piece. For convenience, this extended #21 leadshould be taped along the welding work cable. (This extended#21 lead connection replaces the need to employ the remotework lead accessory on LN-9s which have a direct work leadjack.)

    N.C. Tape up bolted connection.

    N.D. Connect the LN-9 control cable ground lead to the frame terminalmarked near the power source terminal strip. The powersource must be properly grounded.

    N.E. If using an older automatic control cable with leads 75, 76, 77;Connect lead 75 to #75 on terminal strip, connect lead #76 to#74 on terminal strip, connect lead #77 to #73 on terminal strip.

    N.F. The LN-9 voltage control jumpers must be connected as follows(Refer to LN-9 operating manual): White jumper on voltage boardto pin S. Blue jumper on voltage board (later units only) or onstart board (earlier units). To pin B.

    N.G. Set the DC-1000 controls as follows: Set the control switch toOutput Control Remote. For Submerged Arc Processes, set themode switch to C.V. Innershield.

    N.H. Alternative 500 amp positive terminal connection provided onDC-1000 models above code 9500 only.

    Above diagram shows electrode connected positive. To changepolarity, turn power off, reverse the electrode and work leads atthe power source and position the switch on power source toproper polarity.

    Above diagram shows electrode connected positive. To changepolarity, turn power off, reverse the electrode and work leads atthe power source, position the positive-negative switch on thepower source to correspond to the polarity of the electrode cableconnection. Refer to LN-9 operating manual for required polarityconnections.

    2 1 4 2 3 1 3 2 7 3 7 4 7 5 7 6 7 7

    3 2

    3 1

    2

    4

    G

    N

    D

    P O W E R S O U R C E

    L N - 7 C O N T R O L C A B L E

    T O L N - 7 I N P U T

    C A B L E P L U G

    N E G A T I V E P O S I T I V E2 1

    N . B . & N . C .

    N . D .

    N . F .

    N . A .

    E L E C T R O D E C A B L E T O

    L N - 7 C O N D U C T O R B L O C K

    T O W O R K}

    N . E .

    2 1 4 2 3 1 3 2 7 3 7 4 7 5 7 6 7 7

    3 2

    3 1

    2

    4

    G

    N

    D

    P O W E R S O U R C E

    C A B L E P L U G

    N E G A T I V E P O S I T I V E

    2 1

    N . B . & N . C .

    N . D .

    N . A .

    E L E C T R O D E C A B L E T O

    }

    T O L N - 9 I N P U TN . F .

    N . H .

    W I R E F E E D U N I T

    C O N N E C T T O W O R K

    A

    B

    C }N . E .

    C O N T R O L C A B L E

    S171778-2-90F

    S171858-2-90F

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    F-5DIAGRAMSF-5

    IDEALARC DC-1000

    DC-1000WIRIN

    GDIAGRAMFORCODES

    9919-9925,10293,11305,11330,11331,11332,11333,11334

    NOTE:Thisdiagrami

    sforreferenceonly.

    Itmaynotbeaccurate

    forallmachinescoveredbythisman

    ual.Thespecificdiagramf

    oraparti

    cularcodeispasted

    insidethemachineononeoft

    heenclosurepanels.

    Ifthediagram

    isillegible,writetotheServiceDepartmentforareplacement.Givetheequipmentcodenumber.

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    F-6DIAGRAMSF-6

    IDEALARC DC-1000NOTE:Thisdiagramisforrefere

    nceonly.

    Itmaynotbeaccurateforallmachinescoveredbythismanual.Th

    especificdiagramforaparticularcode

    ispastedinsidethe

    machineononeoftheenclosure

    panels.Ifthediagramisillegible,write

    totheServiceDepartmentforareplacement.Givetheequipmentcodenumb

    er.

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    NOTES

    IDEALARC DC-1000

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    WARNING

    AVISO DEPRECAUCION

    ATTENTION

    WARNUNG

    ATENO

    Spanish

    French

    German

    Portuguese

    Japanese

    Chinese

    Korean

    Arabic

    READ AND UNDERSTAND THE MANUFACTURERS INSTRUCTION FOR THIS EQUIPMENT AND THE CONSUMABLES TO BEUSED AND FOLLOW YOUR EMPLOYERS SAFETY PRACTICES.

    SE RECOMIENDA LEER Y ENTENDER LAS INSTRUCCIONES DEL FABRICANTE PARA EL USO DE ESTE EQUIPO Y LOSCONSUMIBLES QUE VA A UTILIZAR, SIGA LAS MEDIDAS DE SEGURIDAD DE SU SUPERVISOR.

    LISEZ ET COMPRENEZ LES INSTRUCTIONS DU FABRICANT EN CE QUI REGARDE CET EQUIPMENT ET LES PRODUITS AETRE EMPLOYES ET SUIVEZ LES PROCEDURES DE SECURITE DE VOTRE EMPLOYEUR.

    LESEN SIE UND BEFOLGEN SIE DIE BETRIEBSANLEITUNG DER ANLAGE UND DEN ELEKTRODENEINSATZ DES HER-STELLERS. DIE UNFALLVERHTUNGSVORSCHRIFTEN DES ARBEITGEBERS SIND EBENFALLS ZU BEACHTEN.

    Do not touch electrically live parts orelectrode with skin or wet clothing.

    Insulate yourself from work andground.

    No toque las partes o los electrodosbajo carga con la piel o ropa moja-da.

    Aislese del trabajo y de la tierra.

    Ne laissez ni la peau ni des vte-ments mouills entrer en contactavec des pices sous tension.

    Isolez-vous du travail et de la terre.

    Berhren Sie keine stromfhrendenTeile oder Elektroden mit IhremKrper oder feuchter Kleidung!

    Isolieren Sie sich von denElektroden und dem Erdboden!

    No toque partes eltricas e elec-trodos com a pele ou roupa molha-

    da. Isole-se da pea e terra.

    Keep flammable materials away.

    Mantenga el material combustiblefuera del rea de trabajo.

    Gardez lcart de tout matrielinflammable.

    Entfernen Sie brennbarres Material!

    Mantenha inflamveis bem guarda-dos.

    Wear eye, ear and body protection.

    Protjase los ojos, los odos y elcuerpo.

    Protgez vos yeux, vos oreilles etvotre corps.

    Tragen Sie Augen-, Ohren- und Kr-perschutz!

    Use proteo para a vista, ouvido ecorpo.

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    WARNING

    AVISO DEPRECAUCION

    ATTENTION

    WARNUNG

    ATENO

    Spanish

    French

    German

    Portuguese

    Japanese

    Chinese

    Korean

    Arabic

    LEIA E COMPREENDA AS INSTRUES DO FABRICANTE PARA ESTE EQUIPAMENTO E AS PARTES DE USO, E SIGA ASPRTICAS DE SEGURANA DO EMPREGADOR.

    Keep your head out of fumes. Use ventilation or exhaust to

    remove fumes from breathing zone.

    Los humos fuera de la zona de res-piracin.

    Mantenga la cabeza fuera de loshumos. Utilice ventilacin oaspiracin para gases.

    Gardez la tte lcart des fumes. Utilisez un ventilateur ou un aspira-

    teur pour ter les fumes des zonesde travail.

    Vermeiden Sie das Einatmen vonSchweibrauch!

    Sorgen Sie fr gute Be- undEntlftung des Arbeitsplatzes!

    Mantenha seu rosto da fumaa. Use ventilao e exhausto para

    remover fumo da zona respiratria.

    Turn power off before servicing.

    Desconectar el cable de ali-mentacin de poder de la mquinaantes de iniciar cualquier servicio.

    Dbranchez le courant avant lentre-tien.

    Strom vor Wartungsarbeitenabschalten! (Netzstrom vllig ff-nen; Maschine anhalten!)

    No opere com as tampas removidas. Desligue a corrente antes de fazer

    servio. No toque as partes eltricas nuas.

    Do not operate with panel open orguards off.

    No operar con panel abierto oguardas quitadas.

    Noprez pas avec les panneauxouverts ou avec les dispositifs deprotection enlevs.

    Anlage nie ohne Schutzgehuseoder Innenschutzverkleidung inBetrieb setzen!

    Mantenha-se afastado das partesmoventes.

    No opere com os paineis abertosou guardas removidas.

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