Service Manual

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 Supply voltage to the ice machine will be interrupted if the drain pump
becomes full.
19.7.6 The Drain Pump is Inoperative:
1. Verify that the power cord is connected at the pump (2 locations) and the
main power board.
2. Look for possible restrictions in drain lines.
3. Ensure that the vent line is clear and able to breathe.
4. Not enough water to turn pump on.
a. At least 1 quart (.95 liters) of water is needed to activate the
pump.
19.7.7 The Drain Pump runs but not pumping:
1. Look for possible restrictions in drain lines.
2. Ensure that the vent line is clear and able to breathe.
3. Check to see if the drain line is to specifications.
a. Maximum lift is 8 feet (2.44 meters).
b. Maximum run is not greater than 20 feet (6.1 meters).
19.7.8 The Drain Pump runs momentarily and shuts off:
1. Ensure that the drain and vent lines are free and unrestricted.
2. Verify that the drain pump is level.
3. Look for loose voltage connections; inspect the power cord where it is
connected at the pump (2 locations) and the main power board.
19.7.9 Thermistor (Sensor) Error Detection:
Temperature thermistors are monitored continuously by the main power board. Any “OPEN,
SHORTED, or OUT of RANGE” thermistor circuit will initiate an alarm.
If an error is detected, the ice machine will immediately shut down and the display interface
will flash the corresponding fault code continuously. No audible alarm will sound.
19.7.10 Communication Error:
Loss of communication between the main power board and the user interface will result in
either a continually flashing “ON” or “OFF” on the display.