Indicator
Power LEDs (PWR)
not on.
Bin signal LEDs (BE)
not on.
Water OK LED (WTR)
on primary board not
on.
Bin timer (BT) LEDs
on.
Bin timer (BT) LED
on and water OK LED
(WTR) on primary
board flashing.
Drive LEDs (DRV) lit
on both boards.
20M, 60M or 2ND LED
lit.
Possible cause
No power to evaporator unit.
1. Defective bin thermostat
2. Dispenser bin signal switches turned off.
1. No water in float reservoir
2. Sensor incorrectly installed.
3. Sensor defective.
Normal shutdown on bin thermostat.
Plugged water filter or water strainer.
1. No output on drive terminal (DRV)
2. Inoperative gearmotor.
Icemaker tripping on overload protection.
Corrective action
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.
Troubleshooting
Problem: No ice production – evaporator gearmotors not running or only one gearmotor running
Step 1: Check circuit board LEDs on evaporator units.
25
Evaporators are iced
up, no ice production
No compressor LED
(C ) on primary board.
Both compressor
LEDs (C ) are lit,
suction line not cold.
1. Float reservoir empty.
2. Air bubble in water supply line, water in
reservoir but not in evaporators.
Compressor switch in off position.
1. No power on fan terminals (FAN) on either
control
board.
2. Contacts 4 & 7 on either relay not closing
when fan terminals (FAN) are energized.
3. Defective liquid line solenoid valve/coil.
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.
Problem: No ice production – both gearmotors are running
Step 1: Check circuit board LEDs on evaporator units
