ZBD9900RII GE Monogram Dishwasher Service Manual

8/19/2019 ZBD9900RII GE Monogram Dishwasher Service Manual

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GE Monogram Dishwasher

ZBD9900RII



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ZBD9900RII



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IMPORTANT SAFETY NOTICE

The information in this presentation is intended for use by individualspossessing adequate backgrounds of electrical, electronic, &mechanical experience. Any attempt to repair a major appliance mayresult in personal injury & property damage. The manufacturer or sellercannot be responsible for the interpretation of this information, nor can itassume any liability in connection with its use.

WARNING

To avoid personal injury, disconnect power before servicing this product.If electrical power is required for diagnosis or test purposes, disconnectthe power immediately after performing the necessary checks.

RECONNECT ALL GROUNDING DEVICES

If grounding wires, screws, straps, clips, nuts, or washers used tocomplete a path to ground are removed for service, they must bereturned to their original position & properly fastened.


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GE Factory Service Employees are required to use safety glasses with sideshields, safety gloves & steel toe shoes for all repairs.

Dyneema® CutResistant Glove

Safety Glasses

must be

compliant with

ANSI Z87.1-2003

Prescription Safety Glasses

Plano Safety Glasses

Steel Toe Shoes

VR Gloves – provide shock protection



New Features of the Monogram Dishwasher

Brand new design

Control panel

Front door

Larger tub

Height-adjustable upper basket

New cutlery basketNew location for inlet valve

Flow meter

Pressure Sensor

New dishwashing programs

Diagnostics

101 lbs



The toe kick is on the top of the top piece of

packaging styrofoam

The installation manual and hardware packet

are inside the machine.

Installation



Snap the glide feet onto the leveling legs to

prevent damage to the floor.

Please note that the plastic glide feet can still

mar some soft wood floors. Caution should

always be used when moving a unit into

place.

Installation



Adjust the door springs – the door

should remain balanced once opened.

Both spring ends can be turned

clockwise to increase tension, andcounter-clockwise to decrease tension.

Installation



PEX water fill line – Comes with a 3/8”

compression nut that is intended to be

connected to a shut off valve with

compression threads.

If the home shut off valve has a solderfitting, simply cut the copper under the sink

and join the copper and PEX materials with

a 3/8” compression union.

Installation



Drain line – The high loop bracket

comes attached to the unit at the

ideal height. It should not be

removed.

The drain hose comes set up with

a graduated boot designed to

accommodate connections that are

½”, 5/8”, 23/32”, and 7/8”.

Installation



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The power cord that is

approximately 42” long comesalready attached to the unit.

The terminal block is set up so that

the unit can be hard wired or a

longer cord installed if needed.

Installation



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High and Low position of upper basket



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• Note the two ports built in to the upper shower support to

accommodate either position. Also note the use of flappers to direct

water.

•Check for leaking flapper if poor wash reported for upper basket.




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• If upper rack is in the “low” position, simply grab the rack on both sides and pull it

straight up. It automatically “locks” into the “high” position.

• If the upper rack is in the “high” position, pull out on both of the adjustment arms,

and the rack “drops” down into the low position.




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To replace either adjustment bracket

assembly, push the retaining pin out, unhook

the single grip, and release from the other

end.

Upper Rack - Removal

• Swing both end caps 90˚ to the

outside to remove top shelf

• To replace end cap, pry up or down on

the end cap to release tabs on the top

and bottom.



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Upper Shower Arm - Removal

• Unscrew the upper spray arm bearing located underneath the arm

for removal



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Upper Basket and Shower Overview



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New Component Removal Tool

This tool is used to remove 5 specific components on this dishwasher.

• Sump lock ring (inside bottom of tub)

• Fan lock ring (door)

• Lock ring spray bearing (under tub at sump)

• Light cover (inside tub)

• Air break lock ring (inside tub)



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Inside Tub Components - Overview

Light

Air Break

Lower shower arm

Filters and sump

Upper spray tube guide



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Inside Tub Components – Lower Shower Arm

• Pull lower shower arm straight up to

remove.• Pull the coarse basket filter straight up

with the handle

Coarse Filter



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•Turn handle counter-clockwise to remove

tubular fine filter and fine screen filter

Inside Tub Components - Filters

• Lift fine screen filter straight off

Filtration: The coarse fi l ter traps large food particles that cannot get past the drain pump.

The f ine fi l ter collects debris that is automatically rinsed away during each wash. The fine filter and

tubular section should be cleaned once or twice a year.



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Inside Tub Components - Sump

Access to any debris in the drain pump can be accomplished by removing the small yellow

drain coupling.

Once removed you can insert your finger and reach the impeller blade. ( appx ¾ “ into opening)

Operating the dishwasher without the yellow coupling or filters will produce poor washability

To Circulation pump

To Drain Pump

Pressure Sensor

C S



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Inside Tub Components – Sump Well

• Position “tool” down tightly on sump lock ring

• Turn counter-clockwise to remove.

(Utilize holes in tool if lock ring is extremely tight)

Note: The only time this would

necessary would be to replace

a cracked or bad sump.

I id T b C t Ai G l k i



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Inside Tub Components – Air Gap lockring

• Utilize “tool” to remove air break

lock ring.

• Turn CCW

I id T b C t Li ht



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Inside Tub Components - Light

• Turn CCW to remove

light cover, & bulb.

• Halogen 5W 12V bulb

• Turns on when dooropened more than 5

• Switch activated by left

hinge

Outside tub view and access to light & housing

I id T b C t U id



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Inside Tub Components – Upper spray arm guide

• Pull straight out while pressing in on notched tab

at the top.

I id T b C t O fl C



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Inside Tub Components – Overflow Cap

The “overflow drain cap” must be in place to prevent water from leaking inadvertently in to

the base pan. Under normal conditions, the soap and water will not get into that area but if

conditions were right for an overflow condition, the water level or soap level would be high

enough to exit into the base pan, and trip the overflow switch and drain.

Normal Water level

W t L l



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Water Level

Check the water level using

the spray arm hub.

The normal fill will come to

approximately the top of the

flat raised area as indicated.

An “overfill” condition will be

recognized closer to thelocking lip indicated with

the red arrow.

Normal Fill = .85 gallon

(Total cycle = 5.3 gallons)

Overfill = 1.25 gallons

W t L l H D it W k?



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Water Level – How Does it Work?

Water Inlet Valve Flow Meter Main Control Board

Normal Fill: (3.2L / .85 gallon)

• Water Valve opens and water passes through flow meter

• Flow meter looks for 220 pulses per liter. (appx 1 quart)

• 704 pulses indicates proper fill. (220 X 3.2 = 704)

• Main Control stops fill.

• Flow rate maximum of 1 gallon per minute

Fill takes less than 1 minute. (Approximately 45- 52 seconds)

W t L l Wh t if ?



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Water Level – What if ?

What if:

1) The water pressure is low? i.e. low house pressure, clogged valve, etc.

The flow meter utilizes an impeller, with two magnets, driven by water flow. When the flow

rate is less than 1/3 liter per minute, the board stops the fill cycle and an error is flagged to

the customer. (more on errors later)

a) Remember 220 pulses per liter (approx. 1 quart) is normal. (The above

scenario happens if there are less than 80 pulses in 60 seconds.)

b) 80 pulses are reached but pressure is barely above that amount. Overall fill

time reaches 255 seconds but the board did not see 704 total pulses. An error

is logged

2) The flow meter failed? i.e. no signal to main control.

Water could still enter the machine but the board would not see a signal from flow meter.

…..then what happens?

Water Le el What if contin ed ?



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Pressure Sensor

Water Level – What if, continued ?

Introducing the “Pressure Sensor”

A pressure sensor is located in a pressure chamber in the bottom well. It measures the

pressure which corresponds to the water level in the machine. It functions like any pressure

sensor with a diaphragm and air channel with pressure.

• Reports pressure reading to board.

• Acts like a “safety” device.

• If it sees an overfill condition for 5 consecutive seconds (appx 4.7 liters / 1 ¼ gallons) it

stops the cycle and turns on the drain pump.

Water Level Pressure Sensor



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Water Level – Pressure Sensor

The Pressure Sensor also:

• Can add a pre-wash under certain conditions (clogged filter < 1vdc reported to control)• Can add water if a bowl has flipped over and catches some of the wash water.

• Can add time to drain. (25 seconds to max of 3 minutes)

• Works off a 5VDC circuit. Ranges from .5 - 3.5VDC. (.5 = empty 2.8 VDC = normal

3.5 = overfill ; > 4.8 generates an error) Voltages are approximate

Pressure Sensor Removal



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Pressure Sensor - Removal

• Pull pressure sensor straight out

of location.• Note securing clip

Pressure Sensor Removal



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Pressure Sensor - Removal

Note opening of air chamber

where sensor mounts.

Water Valve Removal



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Water Valve - Removal

View From the Front Panel

(Not accessible to replace from the front)

.95k ohms Rated 4.2 - 140 p.s.i. Full flow 30 p.s.i 1 g.p.m.

Water Valve Removal from Upright position



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Water Valve - Removal from Upright position

View from back with rear access panel removed




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Press locking tab and twist circulation pump clockwise

¼ turn to remove




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With a flat bladed screwdriver, press in to disengage locking tab on top.Using a longer screwdriver, press the front locking tab forward while prying the

water valve out

Pry here




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Note top tab and front tab




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Notice tight space if circulation pump is left in place.

There is not enough clearance to remove or replace valve

Water Valve - Removal from Laying down position



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Remove back access panel

Remove 4- T30 Torx screws. 2 on each side


Inside tub view Outside tub view


Loosening and rotating the lower base assembly down from rear of the machine willprovide access to the lower components, including the water valve.




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• Dishwasher removed, and

screws removed

• Lay dishwasher on its

side (opposite valve)

• Roll the back side down

to gain access.

• Hinge screws left in placewill allow base to “roll”

without coming completely

off and making repair more

difficult. (one door hinge

screw pictured and

highlighted in red)

IMPORTANT NOTE: Floor protection will be required as well as proper

ergonomic service procedures.

Water Valve

Flow Meter




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Water Valve Removal from Laying down position

• Open door slightly and start as

many of the 6 screws as possible.

• Stand dishwasher upright and

install the remainder of screws.

• Tighten all screws.

Re-Install lower base.

Air Gap – Flow meter



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Air Gap Flow meter

All dishwashers must have an air gap to prevent back flow.

On the side of this machine is an anti-backflow device to

prevent dirty water from being siphoned back into the water

system, such as if a vacuum develops in the water system.

As noted earlier, the flow-meter is mounted inside the air

break assembly.

The bottom assembly of the dishwasher would have to be

removed to access the screw that mounts the air-gap.

If the flow meter fails, the machine could be set for “Time Fill”

and the flow meter is by-passed. (See “Adjust Water Fill”

section in service mode)

Water Circulation - Overview



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Water Circulation Overview

Component View - Underneath (Front View)



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Component View Underneath (Front View)

Turbidity Sensor Thermistor

Drain Pump

Water Inlet Valve

Circulation Pump

Overflow cut-out

Float

HeaterAir

Gap

Turbidity Sensor - Removal



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Turbidity Sensor Removal

Machines with an “Auto” program have a turbidity sensor that measures how cloudy the water is. The

sensor comprises of an LED and phototransistor. Between these two, is the dish water. The less light that

reaches the phototransistor, the cloudier the water. The sensor is calibrated during the last rinse of the

auto program. At different points during the auto cycle, the output signal from the turbidity sensorprovides data used to determine how the program will continue (number of pre-washes, temperature,

program time, number of rinses) It only functions in the “Auto” cycle.

If the turbidity sensor fails, the machine assumes the water is “very cloudy”, which results in a longer

program time, pre-washes, additional rinses and temperature.

The turbidity sensor is located at the bottom edge of the bottom drain.

• Spread tabs on either side and pull sensor

straight out

Thermistor - Removal



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Thermistor Removal

The thermistor is located at the front edge of the bottom drain and detects when the selected water temperature

has been reached. If the thermistor is short circuited or detaches from the circuit board, the heater is turned off.

Logic:

• Water heats 4˚ per minute. If water is not heated 40˚ in 10 minutes, the machine advances out of heat mode.

• If temperature reported exceeds 176˚ the unit advances out of heat mode.

• No time out as long as water is heating according to logic.

• Press down on tab and turn counterclockwise (NTC) 70K at room temp (70F˚ )

Heater - Removal



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Heater Removal

The heater is a flow through type and is fitted between the bottom drain and the suction side of the

circulation pump. It comprises of a pipe with a heating coil. One side of the heating coil is fitted with

an overheating cut-out with a trigger temperature of 208˚F and an automatic reset. The other side is

fitted with a safety fuse that opens at 444˚F

• The heater is held in place with two triple lip seals.

• 1200 W 12 ohms 120VAC

• Water heated 4˚ per minute

Diverter causes

water to flow

around in

circular motion

“Live 12 V

” when powered

Circulation Pump



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Circulation Pump

The circulation pump is

a 120VAC 32 ohmmotor.

It can be tested at the

control

Replaced from the rear

of the machine

7 પF start capacitor

(motor hums if failed)

Circulation Pump - Removal



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Circulation Pump Removal

1

2

Rear View

1) Release rubber

support in rear

2) Press “tab” toward

front of machine.

3) Turn pump ¼ turn

clockwise.

3




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p

Circulation pump comes as an assembly. Seal and impeller are not replaceable parts.

NOTE: Alignment tab for re-installation (and see next slide)




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p

• Remove hose clamp.

NOTE: All factory hose

clamps are one time use

and GE hose clampWH1X2036 can be used

as replacements

NOTE: Alignment tab for re-installation

Drain Pump – Check Valve



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p

• Check valve is located inside the

sump well at the drain hose outlet.

Drain Pump - Removal



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p

Press locking tab “out” and turn pump clockwise appx ¼ turn to remove




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p

Drain pump is 120V / 26 ohm motor

It can be removed from the front of the machine

(Removal of EMI filter will make it easier)




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p

To Drain Pump

The drain pump comprises a 30W synchronous motor and a pump component. The directionof rotation is random, making the pump partially self-cleaning. And it can be accessed for

cleaning from inside the tub if necessary.

Note: The drain pump runs for 6-25 seconds at the beginning of every cycle. The time is

dependent upon whether a cycle ended on it’s own, or was stopped by the customer.

EMI Filter



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• Located up front at power cord inlet

• Suppresses interference to ensure

that the machine does not interfere

with nearby electrical equipment.

• Remove with a single T20 screw and

slide to the left to release four bottom

tabs out of the dishwasher frame.

Note wiring positions.

Overflow cut-out - Removal



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The overflow cut-out system comprises of a float that triggers a micro switch. This switches

off the inlet valve electrically and starts the drain pump. The protection remains in placeeven if the main power switch is turned off or if the door is opened.

Remove by pressing the securing tab to the left and pull switch off two support tabs.

Light Switch- Removal



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g

• Switch activated by left

hinge

• The lamp turns on when the

door is opened more than 5˚

• The lamp is dimmed when

lit to reduce the start current

and to extend the life of the

bulb.

• Switch is replace by

removing a single T20 screw.

Leaf arm

Outer Door Panel - Removal



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• “Slightly” Loosen 2 – T25 torxscrews ( 1 each side) to lower the

adjustment brace.

•Complete removal of the screws

would also work and the lower

frame would be completely

removed as well.

NOTE: loosening screws too much

without removing them will cause

interference in removing panel.

.




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•Remove (3) T20 torx screws

on each side of the inner door

• Remove (2) lower center

inner door T20 torx screws




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• Gentle pry outer panel over lower bracket

slides and screw. (both sides)




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•Reach under outer door panel

and push up on door panel

support brace to clear lip of tub.

• Remove ground wire attachedto support brace support

Brace

Ground Wired




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• Roll bottom of outer panel out

appx 45% to clear tabs on upper

escutcheon at top.

• Remove panel

Mini Manual Location



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Mini Manual located on the inside of the outer door panel

Front Door Panel Removed



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Main Control - Testing



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Testing is made difficult due to the same color wires, and small wiring connections.

However, it you look closely at the connections, isolate them as much as possible, and

slightly pull down on the wire harness to test, it will expose enough of the control connectors

to fit meter leads into and take readings

Pressure

Sensor

Testing Example: Pressure Sensor

Escutcheon - Removal



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• Remove outer door panel

• Remove two T20 torx screws on the

top of the inner door

Escutcheon - Removal



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• Grasp escutcheon at bottom and “roll” out about 25 degrees while lifting slightly

upward to disengage 5 tabs at the top.

Main Control - Removal



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• Using a putty knife or

screwdriver, disengage the 3

front plastic control tabs.




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• Rotate bottom of control out

approximately 25 degrees to

disengage top tabs

• Also note alignment pins on

control at top side corners.




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Main Control RemovedReverse procedure for re-installation.

Top “Push Button Cover” with the

program graphics pulls straight off.

Escutcheon Top Trim- Removal



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• With the escutcheon in your hand and turned upside down, use a flat-bladed screwdriver to

press on the small release arm

• While pressing the On/Off switch down, simultaneously slide the top trim in the direction of the

On/Off switch.

Escutcheon Top Trim- Removal



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• Reverse procedure for installation

Main On/Off Switch



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• Remove outer panel

• Remove top escutcheon panel

• Gently pry down on locking tab at

the left

• Slide switch slightly to the left to

release from mounting on top right

corner.

The main on/off switch breaks both L1

and Neutral

Door Interlock Switch - Testing



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Use a small flat-bladed screwdriver to position the door switch

The interlock switch is a micro switch that connects to the main board. The

board looks for a closed circuit (5vdc). Failure in the “closed” position couldresult in the dishwasher operating if the door were opened.

Latch Assembly - Removal



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• Remove outer door panel

• Remove top escutcheon

panel

• With flat-bladed screwdriver,

slightly pry up at the bottom

to release 2 tabs at bottom of

latch• Pull out on the “right” side toclear support post on the left

side

Latch Assembly - Catch



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• Door catch is adjustable with

a single T20 torx screw

Door Vent Fan - Removal



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Under normal conditions, a technician can simply grab the fan cover and turn it ¼ turn

counter-clockwise and remove the outer cover, screws, and inner black lock-ringaltogether.




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If soap build up or something else

caused the lockring to be too tight to turn

by hand, then removal of the cover

screws and cover would be necessary.

Once the lockring is exposed, the new

tool could be used to remove.

NOTE: Open end wrench or other flat

tool could also work.




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The fan extracts the damp air from the machine

during the drying phase of the program. The fan

system has a fan motor that drives a double sided

fan wheel. Dry air is drawn in from the opening on

one side of the fan wheel.

Dry and damp air are mixed in a conduit that ends

at the top of the door, where the air is expelled

through a nozzle.

120 VAC / 180 ohms

Detergent / Rinse Aid - Removal



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• Combined detergent and rinse aid dispenser

• Controlled by a solenoid

• Rinse aid level indicator

• Removed with 6 T20 torx screws.

(3 on top & 3 on the bottom)

• Remove from inside the door.

Door Springs



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• Position front of spring in hinge slot

• Position rear support of spring in selected position

• Turn to adjust

• Stronger springs available for wooden door panels.

Inner Door



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• Remove outer panel.

•Remove 2 - T20 torx screws on

both sides of the inner door.

• Lift door up and off.

Inner Door - Wire Harness Support



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Once inner door is lifted off, take note of

the wire harness support. It will fall out of

place when the inner door is removed.

Locate it back in place before reassembly.

It simply sets on the right side hinge as

shown.

The inner panel is what holds it in place.

Gaskets – Door – Tub



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Inner door comes with lower door gasket Tub gasket simply peels out of a track

Door Hinge



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• Disconnect Spring

• Remove 3 T20 torx screws

Back Cover - Removal



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• Remove 4 T20 torx screws

• Note water supply line, power cord, and drain line routing

Lower Frame - Complete Removal



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Remove back access panel



Inside tub view Outside tub view

Lower Frame - Complete Removal



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Lay machine on the back side.

Remove small T20 torx door hinge screw on

each side. Take care not to drop the small

locking nut.

Lift the door to clear the lower framefrom the door hinge

Small Nut

Main Control – Programs



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Programs Average Total

Cycle Time (Min)

Water Consumption

(Gallons)

Auto 115 - 170 3.4 - 6.3

Heavy 190 - 210 5.3

Normal 105 - 140 4.0 - 5.8

Light 100 - 127 2.9

Speed 20 - 64 2.6

Rinse 4. - 22 0.8

Main Control – Programs Cycle Chart



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Main Control – Programs - Cam Chart



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Speed Wash

Main Control – “Speed Wash” cycle



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Main Control – Programs



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Flush and super cleaning cycles are designed to clean the

filters, and to sweep debris to the drain. Essentially, the desire

is to begin the pre-wash, main wash, and rinses with as little

food residue as possible.

At the end of a pre-wash, rather than just drain out all of the

water, the drain comes on for 2 seconds to drain debrisalready residing in the sump. Then the circulation pump

comes back on for 20 seconds to flush any remaining debris to

the drain. Then the unit drains out the rest of the water.

The flush will fill with around a ¼ gallon of water. The

circulation pump will come on for 2 seconds, then a 5 secondpause where the machine does nothing, followed by 2 more

seconds of circulation pump. Then the step ends with a drain.

Flush and (SCS) Super Clean System

Main Control – Options



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Child Lock Out:

1) Turn off main “On/Off” power switch.

2) Wait at least 5 seconds

3) Press and hold the “Temp Boost” & “Heat Dry” option pads

4) Switch on main “On/Off” power switch 5) Release “Temp Boost” & “Heat Dry” pads after any indicator light comes on.

(appx 3 seconds)

6) Use the “Cycle” pad to select status.

“Auto” LED lit = child lock out is activated

“Auto” LED unlit = child lock out is deactivated

7) Confirm the selection by pressing the “Start/Reset” pad.

Temporary deactivation of the child lock out feature is achieved by pressing the “Temp Boost” &

“Heat Dry” pads together. Both indicator lights will flash if customer tries to start a cycle in the

child lock out mode.

After three minutes, child lock out is automatically re-activated.

Main Control – Model Select Setting



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This new design Monogram Dishwasher main control is common to other models. (not

currently in the Monogram lineup) The service technician MUST run a “model select”

setting or the machine will not function.

If the control is replaced, the machine will automatically be in the “model select” settingmenu when the power supply is switched on for the first time.

To Set Model:

1) Press the “Cycle” pad repeatedly until the desired model setting is selected.

(Auto LED lit)

2) Confirm your selection by pressing the Start/Rest pad.

The machine senses the presence of the turbidity and pressure sensors and reverts to the

main menu.

Main Control – Model Select Setting



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To get back into “Model Select” if need be:

1. Turn off main power switch

2. Wait at least 5 seconds

3. Hold down both the “Cycle” and “Start/reset” pads, while simultaneously turning theMain Power switch On.

4. Release the Cycle and Start/reset pads

5. Within 5 seconds of completing step 4, press and release the Start/reset pads 3

times rapidly until the LED’s start to blink.

6. Select desired model with the Cycle pad.

7. Press Start/reset to confirm and lock in the selection.

Main Control – Options



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Delay Start:

“Delay Start” is either on or off with only “5 hours” as a delay start option.

Total Reset/Clear (Service Mode) Error codes:

To reset machine to its factory settings:

1) Turn main “On/Off” power switch off

2) Wait at least 5 seconds

3) Press and hold the “Cycle” pad

4) Turn main “On/Off” power switch on 5) Release the “Cycle” pad.

Total Reset will clear service mode error codes. It will also reset various settings, although not model

select and water intake volume. The machine then automatically returns to the main menu. This function

might also be used anytime the problem is not obvious.

Main Control – Service Mode - Entering



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1. Turn off main power “On/Off” switch 2. Wait at least 5 seconds

3. Press and hold both “Cycle” and “Start/Reset” buttons.

4. Turn on main power “On/Off” switch

5. Release the “Cycle” and “Start/Reset” buttons

6. “Start” & “Clean” flash

7. Most recent “fault” indicated by graphic pad indicators (see chart)

See next slide for “Fault” codes

See subsequent slide to use the “Component Testing” while in Service Mode

Indicator Indicating Why Check

Main Control – Service Mode - Faults



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AUTO flashes

Temperature Fault

Service Mode

Temperature increase less than

10F degrees in 10 minutes.

Program continues

Heater, thermistor, water level,

circulation pump, main control &

wiring

HEAVY flashes

Overfilling

Use & Care

Too much water in the machine,

pressure sensor or float switchactivated. If the water has not been

drained within 60 seconds, the

program stops.

(drain pump activated)

Drain pump, blocked drain hose,

flow meter, inlet valve leaks, and

wiring.

NORM flashes

Thermistor fault

Service Mode

Stopped or > 175F

Program continues Thermistor and main Control

LIGHT flashes

Water intake fault

Use & Care

< 80 pulses within 60 seconds, or

correct number of pulses not

achieved within 255 seconds.

Program stopped

Water inlet, flow meter, inlet water

valve, & wiring

SPEED flashes

Leaking Valve

Use & Care

valve turned off. Any current

program stopped. (drain pump

activated)

Leak through the inlet valve and flow

meter, check why inlet valve is not

closing.

RINSE flashes

Pressure sensor fault

Service Mode

Output signal > 4.8 VDC

Program continues

Pressure sensor, main control, &

wiring

AUTO & HEAVY

flash

Drain fault

Use & Care

Water not drained after 120

seconds. Program stopped

Drain pump, blocked drain hose,

main control, & wiring. Filter needs

cleaning?

AUTO & SPEED

flash

Turbidity sensor fault

Service Mode

The process assumes high

turbidity in case of "uncertainty" in

the Auto program

Water quality, filters, turbidity

sensor, drain system & wiring

Main Control – Service Mode – Component Testing



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Component Testing:

Pressing the “Cycle” pad progresses through this test.

1: Inlet valve (Auto LED on)

2: Inlet valve again (other models have 2nd valve) (Heavy LED on)

3: (nothing happens; not applicable for this model) (Norm LED on)

4: Rinse aid dispenser solenoid (Light LED on)

5: Circulation pump ( Speed LED on)

6: Circulation pump and heating element ( Rinse LED on)

7: Fan and wax motor (Auto & Heavy LED’s on)

8: Drain pump (Auto, Heavy & Norm LED’s on)

Note: Components remain active until you proceed to next step. Tech should proceed through

test as needed, and then exit the “Component Test” mode.

Main Control – Service Mode - Adjust Water Intake



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Adjust Water Fill:

While in the service mode, press and hold the “Cycle” pad for 3 seconds.

• No wash cycle LED’s next to “Cycle” pad lit --- Normal water intake volum e

Display LED lit

• AUTO ----------------------------- Water intake volume increases by 5%

• HEAVY ----------------------------- Water intake volume increases by 10%

• NORM ----------------------------- Time-controlled water intake (45 seconds)

• LIGHT ----------------------------- Time-controlled 5% increase (47 seconds)

• SPEED ----------------------------- Time-controlled 10% increase (50 seconds)

• RINSE ----------------------------- Time-controlled 15% increase (52 seconds)

Note: Press the “Cycle” pad to scroll through, and “Start” pad to confirm.

Once confirmed, program exits service mode & returns to main menu

Schematic – Blue words are active buttons.



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ZBD9900RII GE Monogram Dishwasher Service Manual

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