Defrost Operation; Service Test Mode - Maytag AFI2538AE Series Technical Information

Service Specifications
To avoid risk of electrical shock that can cause death or severe personal injury, disconnect unit from power before
servicing unless tests require power. Discharge capacitors through a 10,000-ohm resistor before handling. Wires
removed during disassembly must be replaced on correct terminals to ensure proper grounding and polarization.

Defrost Operation:

The Control Board adapts the compressor run time between defrosts to achieve optimum defrost intervals by
monitoring the length of time the defrost heater is on. After initial power up, defrost interval is 4 hours
compressor run time. Defrost occurs immediately after the 4 hours.
Forced Defrost Mode:
The forced defrost function is performed using the Freezer display and Refrigerator keypad. Enter the
Forced Defrost Mode by performing the following sequence of events:
1. Press and hold the Door Alarm Keypad
2. Press and hold Refrigerator Temperature Down Keypad
3. Release the Door Alarm Keypad
4. Press the Refrigerator Down Keypad
5. Press again to force defrost. Fd and Sh will flash in display indicating unit is in defrost.

Service Test Mode:

The service test functions are performed using the refrigerator display and keypad. Enter the Service Test Mode
by performing the following sequence of events:
1. Press and hold the Door Alarm Keypad
2. Press and hold Refrigerator Temperature UP Keypad
3. Release the Door Alarm Keypad
4. The Freezer display will display SE confirming entry in the Service Mode.
5. Press the Refrigerator UP Keypad
6. Display will show 101 in left display and numeric or dashes in right display.
K
7. Press Freezer Up
Service Test – 101 Defrost Heater & Defrost Circuit
•
Press the Refrigerator Up
Defrost circuit. The display will read OFF when de-energized, OP when energized with open defrost thermostat
and CL when energized with closed defrost thermostat.
Service Test – 102 Compressor / Condenser Fan
•
Press the Refrigerator Up
Compressor/Condenser fan On and Off.
.
16026830
!
Door
Alarm
Door
Alarm
and wait 3 seconds. Fd appears in Freezer display.
again. Sh appears in right display.
Door
Alarm
Door
Alarm
and wait 3 seconds.
again to confirm entry in the Service Mode.
eypad and Freezer Down
k
eypad and Refrigerator Down
k
eypad and Refrigerator Down
WARNING
.
.
Fd
.
.
K
eypad to toggle through Service Test numbers.
k
eypad
k
eypad
4
to energize or de-energize the
to toggle
December 2005
© 2005 Maytag Services