Maytag MHWC7500YW0 Manual page 14

FOR SERVICE TECHNICIAN ONLY - DO NOT REMOVE OR DESTROY
WASHER
DISPLAY EXPLANATION AND RECOMMENDED PROCEDURE
F 03
LONG DRAIN
If the drain time exceeds 4 minutes, the water valves
turn off. Only in factory test.
NOTE:
Rotate the cycle control knob to clear the display.
Possible Causes/Procedure
1. Turn washer ON to verify that pump operates.
2. Check the drain hose and make sure it is not
plugged or kinked.
3. Unplug washer or disconnect power.
4. Check the electrical connections at the pump and
make sure the pump is running.
5. Check the drain pump filter for foreign objects.
6. Plug in washer or reconnect power.
7. If the above does not correct the problem,
go to step 8.
8. Unplug washer or disconnect power.
9. Replace the pump.
WATER TEMPERATURE SENSOR ERROR
F 05
Water temperature sensor (NTC) value is out of range
(below 23°F [–5°C] or above 217°F [103°C]) during
wash cycle.
Possible Causes/Procedure
1. Unplug washer or disconnect power.
2. Check the water temperature sensor and connection
to it.
3. Refer to the Water Temperature Sensor section,
page 11.
4. Check wire harness and connections between
the Central Control Unit (CCU) and the water
temperature sensor.
DRIVE MOTOR TACHOMETER ERROR
F 06
If the control is unable to properly detect motor speed,
the washer shuts down.
Possible Causes/Procedure
1. Verify the shipping system, including shipping bolts,
spacers, and cables, is removed.
2. Run Quick Diagnostics Test to check motor drive
system.
3. Unplug washer or disconnect power.
4. Check wire harness connections between the drive
motor and the motor control board, and to the
Central Control Unit (CCU).
5. Plug in washer or reconnect power.
WASHER
DISPLAY
F 0 7
F 1 3
F 1 4
F 2 1
PAGE 14
EXPLANATION AND RECOMMENDED PROCEDURE
MOTOR OVERSPEED
If the motor speed is not controlled, the motor will turn
OFF and wait for the speed to decrease to 0rpm. At the
second occurrence in the same wash phase, the
washer will go to ERROR mode.
Possible Causes/Procedure
1. Run Quick Diagnostics Test to check motor drive
system.
2. Unplug washer or disconnect power.
3. Check wire harness connections to the motor,
and to the Central Control Unit (CCU).
4. Check the drive system for any worn or failed
components.
5. Plug in washer or reconnect power.
6. Check the CCU by looking for operations of the
drive motor.
7. Check the drive motor for powered rotations.
DOOR LOCK ERROR
Failed attempts to lock the door within 10 seconds.
This error code is only shown in Whirlpool factory test.
Possible Causes/Procedure
– Door lock mechanism is broken or removed
from door.
– Door switch/lock unit failure.
1. Run Quick Diagnostics Test to check motor drive
system.
2. Unplug washer or disconnect power.
3. Check door switch/lock unit.
4. Check the wire harness connections to the door
switch/lock unit and Central Control Unit (CCU).
EEPROM ERROR
A communication error between the Central Control
Unit (CCU) and the EEPROM onboard the CCU occurred.
Possible Causes/Procedure
A power surge may cause this error.
– Unplug washer or disconnect power for two
minutes.
– Verify CCU operation by running a Quick Diagnostic
Test or any cycle.
SERIAL COMMUNICATION ERROR
The communication between the Central Control Unit
(CCU) and the user interface board (UI) cannot be sent
correctly.
Possible Causes/Procedure
1. Run Quick Diagnostics Test to check the User
Interface boards and motor.
2. Unplug washer or disconnect power.
3. Check wire harness connections to the user interface
and Central Control Unit (CCU).
– Check connections of the CCU board within the
housing.
– Make sure all grounding switches are engaged.
4. Check the serial harness at the UI.
5. Plug in washer or reconnect power.