FOR SERVICE TECHNICIAN ONLY - DO NOT REMOVE OR DESTROY
PAGE 6
FAILURE DISPLAYS
Active dryer diagnostic codes are shown on the upper portion of
the display and active washer diagnostic codes are shown on the
bottom portion of the display.
DRYER DIAGNOSTIC CODES
If the set-up mode is entered and one of the following errors
has previously occurred, the appropriate diagnostic code will
be in the display on the upper portion of the screen.
DRYER
DISPLAY
EXPLANATION
COIN 1 ERROR
Blocked coin 1 or coin drop UI control circuit failure
(coin recognition and customer display disabled while
blockage persists).
LOW VOLTAGE DETECTION ERROR
Voltage detected below 90 VAC for 8 seconds.
COIN 2 ERROR
Blocked coin 2 or coin drop UI control circuit failure
(coin recognition and customer display disabled
while blockage persists).
GENERATION 2 DEBIT CARD
READER ERROR
Not receiving communications from installed debit
card reader in Enhanced (Generation 2) Debit mode.
DRYER MOTOR CONTROL
CIRCUIT ERROR
Dryer motor control circuit error (cycles and price
display disabled until diagnostic code is manually
cleared). The control doesn’t know if the motor relay
is bad (stuck on), the motor relay drive circuit is bad
(shorted), causing the motor relay to stay on, or the
motor relay feedback circuit is bad.
EXHAUST THERMISTOR OPEN ERROR
Exhaust thermistor open, temperature drops
below 18°F (>50 k
Ω
) for 1 minute in Run mode,
or immediately in Factory Diagnostic Mode.
EXHAUST THERMISTOR
SHORTED ERROR
Exhaust thermistor shorted, temperature above 250°F
(<500
Ω
) for 1 minute in Run mode, or immediately
in Factory Diagnostic Mode.
COMMUNICATION FAILURE
FROM DRYER CCU TO UIC
UIC is not receiving communications from CCU
(cycles and price display disabled while error persists
or is manually cleared).
COMMUNICATION FAILURE
FROM UIC TO DRYER CCU
CCU is not receiving communications from UIC
(cycles and price display disabled while error persists
or is manually cleared).
d 5
d 9
d 13
d 16
F 01
F 22
F 23
F 70
F 71
DRYER
DISPLAY
EXPLANATION
UIC MICROPROCESSOR ERROR
UIC Microprocessor is not able to read or verify
EEPROM (cycles and price display disabled until
diagnostic code is manually cleared).
UIC EEPROM ERROR
UIC EEPROM memory is a CRC failure (cycles and price
display disabled until diagnostic code is manually cleared).
F 73
F 74
WASHER DIAGNOSTIC CODES
If the set-up mode is entered and one of the following errors
has previously occurred, the appropriate diagnostic code will
be in the display on the lower portion of the screen.
WASHER
DISPLAY
EXPLANATION AND RECOMMENDED PROCEDURE
WASHER 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 outlet for correct polarity. To check within
washer for polarity at the RFI, white to cabinet
ground must be 0 volts.
3. Check the white wire on the RFI filter to ensure correct
polarity. White wire needs to be toward front of washer.
If the RFI filter is not easily accessible, the polarity test
can be made on the washer CCU. Disconnect power.
Check for resistance or continuity at IF2 from terminal
#1 to ground or any bare metal on the washer cabinet.
Reading should be infinite or show as an open circuit.
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.
ACCELEROMETER FAILURE
The accelerometer component failed. The X, Y, and Z
limits are outside of the normal range.
Possible Causes
– CCU dislodged from mounting.
– Accelerometer failure on CCU.
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.
– A broken drive belt.
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 15).
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 04
F 11
