Maytag MLE22PD Service Manual page 130

FOR SERVICE TECHNICIAN ONLY - DO NOT REMOVE OR DESTROY
ACCU
TRAC WASHER
®
INDICATION DISPLAY EXPLANATION AND RECOMMENDED PROCEDURE
d 12 F 25
TACHOMETER ERROR
If the MCU is unable to properly detect motor speed,
the washer shuts down. If a failure occurs during high-
speed spin, the door remains locked for 2 minutes.
Possible Causes
– Damaged or poor contact in electrical connection
from MCU to drive motor.
Procedure for damaged MCU connection
1. Clear error code.
2. Unplug the washer or disconnect power.
3. Check for broken belt.
4. Verify that the shipping system, including shipping
bolts and spacers, is removed, and that the power
cord is not tangled in any components inside rear
of washer.
5. Verify electrical connection between MCU and drive
motor connector.
6. Reassemble any disassembled parts.
7. Reconnect to power.
8. Check operation of drive motor in diagnostic mode;
if drum tumbles, the MCU and motor are OK.
d 4 F 26
DOOR SWITCH ERROR
The door switch circuit is open for 5 seconds while the
door is locked.
Possible Causes
– Electrical connections from washer CCU (DCS3)
to door switch in latch are damaged.
Procedure
1. Clear error code.
2. Unplug the washer or disconnect power.
3. Verify the electrical connection between CCU and
door switch by using the Help Mode (see appropriate
symbols, page 15) or continuity test at CCU (DCS3)
connection.
If the door switch circuit fails to open or close, replace
the door latch.
ACCU
TRAC WASHER
®
INDICATION DISPLAY EXPLANATION AND RECOMMENDED PROCEDURE
d 21 F 27
OVERFLOW CONDITIONS
The overflow level is reached for more than
60 seconds. If the washer displays F27, the washer
is probably full of water, and the water supply
has been shut off. If not, water will be pouring out
of the washer from the dispenser and door.
Possible Causes
Procedure
1. Clear error code.
2. Unplug the washer or disconnect power.
3. Remove electrical connections for cold and hot inlet
4. Check if pressure sensor hose is kinked.
5. Verify functionality of inlet valves by running
d 20 F 28 COMMUNICATION FAILURE
BETWEEN WASHER CCU AND MCU
The communication between the Central Control Unit
(CCU) and the Motor Control Unit (MCU) has failed.
Possible Causes
Procedure for communication cable
1. Clear error code.
2. Unplug the washer or disconnect power.
3. Perform continuity test on wire harness connections
4. Verify the drive motor operation in diagnostic mode.
6-4
PAGE 8
– Inlet valve(s) unable to close.
– Pressure sensor hose is kinked.
valves. If water continues to flow into washer, inlet
valve needs to be replaced.
a diagnostic cycle.
– Communication cable from CCU (MI3) to MCU
is damaged.
from CCU (MI3) to MCU (be careful not to spread the
Rast connector ends).
If drum fails to tumble, replace the MCU.