Whirlpool MID-LINE DESIGN, User Manual

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SERVICING THE ADAPTIVE DEFROST CONTROL
STATIC ELECTRICITY DISCHARGE MAY CAUSE DAMAGE
TO THIS ELECTRONIC BOARD.
• Use an anti-static wrist strap. Connect wrist strap to green ground connection
point or unpainted metal in the appliance.
• Touch your finger repeatedly to a green ground connection point or unpainted
metal in the appliance.
• Before removing the part from its package, touch the anti-static bag to a
green ground connection point or unpainted metal in the appliance.
! CAUTION
ADC Test Mode
The refrigerator/freezer defrost system can be checked by manually initiating a defrost cycle. There
are two methods of initiating the ADC Test Mode.
First Test Method:
1. Turn the thermostat off for 15 seconds.
2. Turn the thermostat on for 5 seconds.
3. Turn the thermostat off for 15 seconds.
4. Turn the thermostat on for 5 seconds.
5. Turn the thermostat off for 15 seconds.
6. Turn the thermostat on for 5 seconds.
7. Turn the thermostat off.
In 3 to 8 seconds the ADC should turn on the defrost heater (with the bimetal closed). NOTE: The
test mode will terminate when the bimetal opens.
If the refrigerator/freezer is already in defrost, Test Mode can be terminated by unplugging the
refrigerator/freezer from the wall outlet and waiting 30 seconds before plugging it back in. The
refrigerator/freezer should immediately go into cooling mode if the thermostat is closed.
If this first test procedure fails to make the ADC initiate a defrost cycle, try the following procedure
to make the ADC begin the Test Mode.
Second Test Method:
1. Disconnect the refrigerator/freezer from the wall outlet for at least 30 seconds.
2. Turn the thermostat off.
3. Reconnect power to the refrigerator/freezer.
Within 3 to 8 seconds the ADC should turn on the defrost heater (with the bimetal closed).
If the unit fails to go into the defrost mode during this test, the problem may not be with the ADC. A
defective bimetal may be the cause of the failure. The ADC will only go into a test mode if the
bimetal is closed. If the ADC senses an open bimetal it will return to the cooling mode within 3 to 8
seconds.
HELPFUL HINT: Upon entering the Test Mode, the relay mounted on the ADC board should turn
off the compressor and turn on the defrost heater. Listen for the relay to click.
•If the relay clicks one time when entering the Test Mode, check for continuity in the defrost heater.
•If the relay clicks two times, check for an open bimetal.