Test Running Without Water - LG WT901CW Service Manual

4-5. TEST RUNNING WITHOUT WATER

1) SAFETY CAUTION
• The main power board assembly has exposed live 120 VAC and live DC voltages. Use care when disconnecting
connectors during troubleshooting and testing. (Wear electrostatic discharge gloves when handling the board.)
• Unplug the power when handling the board assembly. (Wear electrostatic discharge gloves when handling the
board. Store the board in an ESD [ElectroStatic Discharge] plastic bag.)
2) SERVICE MODE
The washer must be empty and the controls must be plugged in and turned off.
• To use the CHECK PROGRAM, press Signal and Water Temp. Key simultaneous after power on without depositing
any laundry.
• In Service MODE all LEDs are on and press START (PAUSE) button to check over the following items.
NO CHECK METHOD
1 Initial state
2 Press once
3 Press twice
4 Press 3 times
5 Press 4 times
6 Press 5 times
7 Press 6 times
8 Press 7 times
9 Press 8 times
DISPLAY
• WATER LEVEL frequency is on DISPLAY
in the condition of no water in TUB.
• Display Program Version.
•
After detecting laundry amount the
number of pulse is on the DISPLAY.
• Laundry amount the number of pulse
• EP: Normal Condition
If there is EEPROM failure, display
pulse value only.
+
If EEPROM Fail, display 3 only.
• AUTO OFF
• All LEDS ON.
* 67-74 DISPLAY.
• Laundry amount test.
• Pulsator rotates left direction 4 times, right direction
4 times.
• COLD water.
• EEPROM check.
• HOT water.
• Softener Valve
• If the LID is opened,
In that case, close the LID.
• DRAIN MOTOR is 1st start.
• DRAIN MOTOR is 2nd start.
• DRAIN PUMP is on.
• All LEDS OFF.
26
CHECK ITEM
is on the DISPLAY.