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Troubleshooting
Problem: No ice production – evaporator gearmotors not running or only one gearmotor running
Step 1: Check circuit board LEDs on evaporator units.
Indicator
Power LEDs (PWR)
No power to evaporator unit.
not on.
Bin signal LEDs (BE)
1. Defective bin thermostat
not on.
2. Dispenser bin signal switches turned off.
Water OK LED (WTR)
1. No water in float reservoir
on primary board not
2. Sensor incorrectly installed.
on.
3. Sensor defective.
Bin timer (BT) LEDs
Normal shutdown on bin thermostat.
on.
Bin timer (BT) LED
Plugged water filter or water strainer.
on and water OK LED
(WTR) on primary
board flashing.
Drive LEDs (DRV) lit
1. No output on drive terminal (DRV)
on both boards.
2. Inoperative gearmotor.
20M, 60M or 2ND LED
Icemaker tripping on overload protection.
lit.
Problem: No ice production – both gearmotors are running
Step 1: Check circuit board LEDs on evaporator units
Evaporators are iced
1. Float reservoir empty.
up, no ice production
2. Air bubble in water supply line, water in
No compressor LED
Compressor switch in off position.
(C ) on primary board.
Both compressor
1. No power on fan terminals (FAN) on either
LEDs (C ) are lit,
suction line not cold.
2. Contacts 4 & 7 on either relay not closing
3. Defective liquid line solenoid valve/coil.
Possible cause
reservoir but not in evaporators.
control board.
when fan terminals (FAN) are energized.
Check that unit is plugged in, circuit
breakers are on.
1. Check ice level control.
2. Return to on position
1. Check water supply to reservoir.
2. Check that both sensor probes are in
the reservoir water.
3. Test sensor by jumping out sensor
connection on board
Allow 20 minutes to make sure icemaker
restarts.
Verify integrity of water supply.
1. Replace control board.
2. Test/replace gearmotor.
Refer to torque-out troubleshooting.
1. Check for defective water sensor
(WTR LED remains on when float
reservoir is empty).
2. Purge air from line.
Turn switch to on.
1. Replace defective board
2. Replace defective relay.
3. Replace valve and/or coil.
25
Corrective action
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