GE WCVH4800K0WW Service Manual

FOR SERVICE TECHNICIAN ONLY―DO NOT REMOVE OR DESTROY
Disconnect power before servicing.
Replace all parts and panels before operating.
Failure to do so can result in injury or death.
Electrical Shock Hazard
Electric Discharge (ESD)
Sensitive Electronics
ESD problems are present everywhere. ESD may damage or weaken
the electronic control assembly. The new control assembly may appear
to work well after repair is finished, but failure may occur at a later date
due to ESD stress.
• Use an anti-static wrist strap. Connect wrist strap to ground connection
point or unpainted metal in the appliance.
–OR–
Touch your finger repeatedly to ground connection point or unpainted
metal in the appliance.
• Before removing the part from its package, touch the anti -static bag to a
green ground connection point or unpainted metal in the appliance.
• Avoid touching electronic parts or terminal contact; handle electronic
control assembly by edges only.
• When repackaging failed electronic control assembly in anti-static bag,
observe above-mentioned precautions.
Electrical Shock Notes
• The power must be disconnected before servicing by unplugging
the machine or disconnecting the circuit breaker.
• The machine must be electrically grounded through the lead
in the 3-prong power cord. The cord must be plugged into a
grounded appliance outlet that has been properly installed.
If local codes require an additional ground connection, use a
16-gauge or larger wire to connect the washer cabinet to an
established ground. In all cases, the grounding method must
comply with all local electrical codes and ordinances.
DIAGNOSTIC GUIDE
Before testing washer operation, check the following:
• Is the power cord firmly plugged into a live circuit?
• Has a household fuse blown or circuit breaker tripped? Time delay fuse?
• Are both hot and cold water faucets open and water supply hoses
unobstructed? Before opening the unit make sure the washer is unplugged
from power outlet.
• Check all connections before replacing components. Look for broken or loose
wires, failed terminals, or wires not pressed into connections far enough.
• The most common cause for control failure is corrosion on connectors.
Therefore, disconnecting and reconnecting wires will be necessary
throughout test procedures.
• Connectors: Look at top of connector. Check for broken or loose wires.
Check for wires not pressed into connector far enough to engage metal
barbs.
• Resistance check must be made with power cord unplugged from outlet,
and with wiring harness or connectors disconnected.

SERVICE MODE

To ENTER service mode: Press (while the unit is idle):
Signal - Extra Rinse - Signal - Extra Rinse
To EXIT service mode: Press Power Button
General Navigation
- Upon entering the service mode, the SSD shall display the first test number
t01.
- Rotating the knob counter-clockwise (CCW) decrement the test number in
the display.
Rotating the knob clockwise (CW) increment the test numbers in the
display.
- Once the test number is selected, pressing Start/Pause begin the selected
test.
1
IMPORTANT
IMPORTANT
SYSTEM DRAWING
WATER VALVE(HOT)
SUB PCB
DOOR SWITCH
MAIN PCB
Service Mode
Service mode test Sequence
T01 Version Display Enter
Power
T02 Error Codes Enter
Start/Pause
Power
T03 User interface Enter
test
Power
Enter
T04 Water valve Soil Button On
and dispenser
test
Soil Button Off
Temp Button On Turn on hot water valve and All Temp LEDs turn
Temp Button Off Turn off hot water valve and All Temp LEDs
Spin Button On
Spin Button Off
Signal Button On Turn on bleach valve + cold valve together and
Signal Button Off Turn off bleach valve + cold valve together and
Power
T05 Water level Enter
sensor test
Power
T06 Drain Pump Enter
test
Power
T07 Heater and Enter
Thermistor test
Power
T08 Tumble test Enter
Power
T09 Spin test Enter
Power
175D6576P001
Pub No 31-16589
WATER VALVE(COLD)
FILTER-EMI
PRESSURE SENSOR
MOTOR
DOOR LOCK SWITCH
HEATER & THERMISTER
TRANS REACTOR
DRAIN PUMP
Display software version
Returns to service mode screen
Displays error codes
Clears highlighted error code from machine
Returns to service mode screen
Turn all remaining LED
Returns to service mode screen
Display "U"
Turn on cold water valve and All Soil Level LEDs
turn On
Turn off cold water valve and All Soil Level LEDs
turn Off
On
turn Off
Turn on bleach valve and All Spin speed LEDs
turn On
Turn off bleach valve and All Spin speed LEDs
turn Off
signal LED turns on
Signal LED turns Off
Returns to service mode screen
Turn on the cold water valve, the water level
frequency continue updating on SSD
Drain and return to service mode screen
Turn on the drain pump
Returns to service mode screen
On entry, the control will display the estimated
temperature (0 F) turn on the cold valve and
heater is turn on
The water temperature sensor test displays the
water temperature trend in the display, if the
sensor is reading falling temperature from the
baseline it will blink the numbers in the display,
if it senses raising temperatures it will solid the
numbers in the display.
Returns to service mode screen
Unit tumbles
Returns to service mode screen
Displays "estimated" and "current" rpm
Returns to service mode screen