Maytag MLE20PDAYW0, Service Manual

Page: 168 / 204

6-2
Dryer DiaGnOSTiC
CODeS
Failure DiSPlayS
Washer Quick Overview Test Cycle – With
the entire display flashing, this cycle is
started by pressing the lower middle
(DELICATES AND KNITS) button. This
cycle provides a quick verification that the
cold and hot water valves, dispenser, and
pump motor are working. It also includes
door lock, drain, and spin operations.
Dryer Field Diagnostic Cycle – With the
entire display flashing, this cycle is started
by pressing the upper middle (PERM.
PRESS) button. Additional time can be
added by pressing the upper-left (WHITES
& COLORS) button. This cycle can be used
to credit lost customer dryer time. Pressing
the lower right (QUICK CYCLE) button
will exit diagnostic mode and cancel a
diagnostic cycle in process.
5.
6.
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.
ACCU
TRAC
®
DRYER
INDICATION 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 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 CCU
CCU is not receiving communications from UIC (cycles
and price display disabled while error persists or is
manually cleared).
d
5
d
5
d
9
d
9
d
1 3
d
1 3
d
1 6
d
1 6
d
4 f 0 1
d 2 f 22
d
3 f 23
d
22 f 70
d 23 f 7 1
ACCU
TRAC
®
DRYER
INDICATION 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).
d
8 f 73
d
8 f 74
If the set-up mode is entered and one of the
following dryer errors has previously occurred,
the appropriate diagnostic code will be in the
display on the upper portion of the screen.