30
Horizon HCD700R/N, HMD700R/N Ice Machines
Troubleshooting
Please see “Service” section for a description of each function.
Ice machine disposition
Possible causes
Corrective action
FLASHING
ON or OFF
Legend:
OFF
ON
1. Ice machine is in running
condition but not making ice.
.
1. Defective compressor.
2. Defective start relay.
3. Defective start capacitor.
4. Defective run capacitor.
5. Defective main contactor.
6. No output from PC board.
7. Machine in Purge cycle.
1. Replace compressor.
2. Replace start relay.
3. Replace start capacitor.
4. Replace run capacitor.
5. Replace main contactor.
6. Replace PC board.
7. Check for Purge operation.
2. Machine in TIME DELAY without
full bin.
1. Ice jamming due to improperly
installed transport tube causing
a false shuttle.
2. Shuttle stuck in up position.
3. Damaged or improperly installed
thermostat (open).
4. Transport tube backed-out of
coupling.
1. Correct transport tube routing.
2. Repair or replace shuttle
mechanism.
3. Replace or reposition thermostat.
4. Correct coupling installation.
3. Ice machine is not making ice.
HI AMPS.
.
1. Mineral build-up on evaporator/
auger causing ice to jam auger.
2. Damaged shuttle mechanism.
3. Intermittent drive output from
PC board. Evaporator will freeze
causing a HI AMPS error.
4. Gearmotor is unplugged.
1. Clean ice machine. Increase
flushing frequency.
2. Replace or repair shuttle
mechanism.
3. Replace PC board.
4. Plug in gearmotor.
4. Ice machine is not making ice.
Drain clog.
.
1. Drain hose kinked or plugged
causing water to back up.
2. Improper floor drain routing/pitch
causing water to back up.
3. High TDS levels and leaking
drain solenoid may cause an
errant drain clog.
4. No vent on external drain line.
1. Remove kink or blockage from
drain hose.
2. Re-route floor drain.
3. Clean area around drain sensor
and/or replace Drain solenoid valve.
4. Add vent to drain line.
