6-2
FOR SERVICE TECHNICIAN ONLY - DO NOT REMOVE OR DESTROY
PAGE 5
FAILURE/DIAGNOSTIC DISPLAY CODES
WASHER
DISPLAY EXPLANATION AND RECOMMENDED PROCEDURE
CCU ERROR
Communication error within the Central Control Unit
(CCU); the pump drive in CCU fails to activate; one of
the main relays in the CCU fails to activate.
Possible Causes
– A power surge/drop.
– Reversed polarity or mis-wire, along with open
ground switches.
Surge/drop procedure
1. Clear error code.
2. Unplug washer or disconnect power.
3. Wait 2 minutes before reconnecting power.
4. Verify CCU by running a short diagnostic test.
Mis-wire or reversed polarity procedure
1. Clear error code.
2. Check the white wire on the RFI filter to ensure
correct polarity. White wire needs to be toward front
of washer.
3. Check outlet for correct polarity. To check within
washer for polarity at the RFI, white to cabinet
ground must be 0 volts.
4. Check that the ground switches of the toe panel
and rear panel are correctly closed.
5. Verify CCU by running a short diagnostic test.
If these procedures do not correct the failure, replace
the CCU control.
MCU ERROR
Motor Control Unit (MCU) has a failure.
Possible Causes
– A repeating under or overvoltage condition. If the
failure occurs during a high-speed spin, the door
remains locked for 2 minutes.
Procedure
1. Clear error code.
2. Unplug the washer or disconnect power.
3. Using Ohm meter, check wire harness connections
for continuity between drive motor and the MCU.
4. Check the motor and do a continuity test (page 13).
5. The MCU is good if the motor operates in diagnostic
mode.
If the motor fails to turn on, replace the MCU.
F
01
F
1 1
WASHER
DISPLAY EXPLANATION AND RECOMMENDED PROCEDURE
NO WATER DETECTED ENTERING WASHER
The first level of pressure switch is not tripped after
6 minutes and/or the second level of pressure switch
is never reached. NOTE: The message “lo H20” will
appear before the F20 error is displayed, and the washer
may try 3 times before the failure code is activated.
Possible Causes
– No water to washer; faucet(s) turned off.
– Defective hot and/or cold valve(s).
– Plugged or kinked inlet hoses or valves.
– Pressure switch or pressure switch hose
damaged, kinked, or disconnected.
– Electrical connection from CCU (PR6) to pressure
switch damaged.
– Blocked inlet from dispenser to tub.
Procedure
1. Clear error code.
2. Unplug washer or disconnect power.
3. Check incoming water pressure at faucet.
4. Check inlet hoses for possible leaks.
5. Ensure pressure switch hose is in good condition
and properly connected to tub and pressure switch.
6. Check that there is not a drain siphon problem.
7. Perform continuity test on wire harness connections
from CCU to inlet valves (VCH7), pressure switch
(PR6), and drain pump (DP2).
8. Check inlet valves by running a diagnostic test.
9. Check that the pump is not running while the
washer is filling.
10. Verify pressure switch operation by accessing
Help Mode while running a paid cycle.
LONG DRAIN
The drain time exceeds 8 minutes without reaching
reset level in pressure switch.
NOTE:
■
Suds can cause delays in draining, indicated by an
alternating display of “SudS” and a countdown timer.
Washer drains for 4 minutes,pauses 5 minutes, then
tries again for 4 additional minutes of draining. F21
will display if washer does not drain. (Normal drain
takes less than 2 minutes).
Possible Causes
– Damaged or blocked pump.
– Drain hose blocked or exceeds recommended height.
– Poor connection between CCU (DP2) and drain pump.
Procedure
1. Clear error code.
2. Unplug washer or disconnect power.
3. Ensure the drain hose is not sealed
in the standpipe.
4. Ensure the drain height is not more than 8 ft
above the base of the washer.
5. Check the drain hose and ensure it is not plugged
or kinked.
6. Check the drain pump for foreign objects.
7. Check the electrical connection between the pump
and the CCU (DP2).
8. Check the pump using a diagnostic mode.
If all the above are OK and pump is powered but does
not pump water or water flow is poor, replace the pump.
F
20
F
2 1
FAILURE / ERROR DISPLAY CODES
FOR SERVICE TECHNICIAN ONLY - DO NOT REMOVE OR DESTROY
PAGE 5
FAILURE/DIAGNOSTIC DISPLAY CODES
WASHER
DISPLAY EXPLANATION AND RECOMMENDED PROCEDURE
CCU ERROR
Communication error within the Central Control Unit
(CCU); the pump drive in CCU fails to activate; one of
the main relays in the CCU fails to activate.
Possible Causes
– A power surge/drop.
– Reversed polarity or mis-wire, along with open
ground switches.
Surge/drop procedure
1. Clear error code.
2. Unplug washer or disconnect power.
3. Wait 2 minutes before reconnecting power.
4. Verify CCU by running a short diagnostic test.
Mis-wire or reversed polarity procedure
1. Clear error code.
2. Check the white wire on the RFI filter to ensure
correct polarity. White wire needs to be toward front
of washer.
3. Check outlet for correct polarity. To check within
washer for polarity at the RFI, white to cabinet
ground must be 0 volts.
4. Check that the ground switches of the toe panel
and rear panel are correctly closed.
5. Verify CCU by running a short diagnostic test.
If these procedures do not correct the failure, replace
the CCU control.
MCU ERROR
Motor Control Unit (MCU) has a failure.
Possible Causes
– A repeating under or overvoltage condition. If the
failure occurs during a high-speed spin, the door
remains locked for 2 minutes.
Procedure
1. Clear error code.
2. Unplug the washer or disconnect power.
3. Using Ohm meter, check wire harness connections
for continuity between drive motor and the MCU.
4. Check the motor and do a continuity test (page 13).
5. The MCU is good if the motor operates in diagnostic
mode.
If the motor fails to turn on, replace the MCU.
F
01
F
1 1
WASHER
DISPLAY EXPLANATION AND RECOMMENDED PROCEDURE
NO WATER DETECTED ENTERING WASHER
The first level of pressure switch is not tripped after
6 minutes and/or the second level of pressure switch
is never reached. NOTE: The message “lo H20” will
appear before the F20 error is displayed, and the washer
may try 3 times before the failure code is activated.
Possible Causes
– No water to washer; faucet(s) turned off.
– Defective hot and/or cold valve(s).
– Plugged or kinked inlet hoses or valves.
– Pressure switch or pressure switch hose
damaged, kinked, or disconnected.
– Electrical connection from CCU (PR6) to pressure
switch damaged.
– Blocked inlet from dispenser to tub.
Procedure
1. Clear error code.
2. Unplug washer or disconnect power.
3. Check incoming water pressure at faucet.
4. Check inlet hoses for possible leaks.
5. Ensure pressure switch hose is in good condition
and properly connected to tub and pressure switch.
6. Check that there is not a drain siphon problem.
7. Perform continuity test on wire harness connections
from CCU to inlet valves (VCH7), pressure switch
(PR6), and drain pump (DP2).
8. Check inlet valves by running a diagnostic test.
9. Check that the pump is not running while the
washer is filling.
10. Verify pressure switch operation by accessing
Help Mode while running a paid cycle.
LONG DRAIN
The drain time exceeds 8 minutes without reaching
reset level in pressure switch.
NOTE:
■
Suds can cause delays in draining, indicated by an
alternating display of “SudS” and a countdown timer.
Washer drains for 4 minutes,pauses 5 minutes, then
tries again for 4 additional minutes of draining. F21
will display if washer does not drain. (Normal drain
takes less than 2 minutes).
Possible Causes
– Damaged or blocked pump.
– Drain hose blocked or exceeds recommended height.
– Poor connection between CCU (DP2) and drain pump.
Procedure
1. Clear error code.
2. Unplug washer or disconnect power.
3. Ensure the drain hose is not sealed
in the standpipe.
4. Ensure the drain height is not more than 8 ft
above the base of the washer.
5. Check the drain hose and ensure it is not plugged
or kinked.
6. Check the drain pump for foreign objects.
7. Check the electrical connection between the pump
and the CCU (DP2).
8. Check the pump using a diagnostic mode.
If all the above are OK and pump is powered but does
not pump water or water flow is poor, replace the pump.
F
20
F
2 1
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