What’s the Problem?
The unit is not producing ice.
How do I troubleshoot the issue?
Prior to troubleshooting check for electrical issues affecting the unit. Identify if the power supply is off or not within specifications, or if the ice machine’s switch box fuse is blown or breaker tripped. Also check if the fuse in the condensing unit control box is blown.
Step 1: Check that the water system is functioning properly. Make sure the water supply is on and water pressure is ≥ 10 PSIG.
Step 2: Check for clogs in the external water filters and at the inlet water valve.
Step 3: Next, identify if the high-pressure switch in the condensing unit (SRK) is tripped. If so, check the following items and repair as needed:
- Dirty condenser
- Inoperative fan
- Open headmaster (CPR)
- Refrigerant overcharge
- Bad contacts
- Plugged refrigerant lines or components
Step 4: Resolve any of the following issues affecting the condensing unit thermostat:
- Excessive high ambient temperature
- Faulty compressor or compressor components
- Defective thermostat
- Open hot gas valves
- Dirty condenser
- Inoperable fan
Step 5: Check the wire harness connecting the ice-making unit with the condensing unit for any loose or disconnected wires. Then, make sure the control switch is not in the Wash or Off position. The switch must be set to Ice (or ON) to make ice. Ensure the contacts are good.
Step 6: Test the control transformer (120V, 12V) to identify if there is an open or shorted winding.
Step 7: Check the interlock switch on the cleaning valve to identify if it is in the open (vertical) position, and check for bad contacts.
Step 8: On the control board, check for alarms and the bin control open yellow LED, indicating a full bin. Check the board and replace it if it is bad.
Step 9: Check if the bin control is tripped with the bin filled with ice, the actuator is stuck in position, or bin control is defective.
Step 10: Check that the float switch moves freely, and is not defective.
Step 11: Next, inspect for the following problems affecting compressor performance:
- Bad magnetic contactor contacts or an open coil winding
- Defective start capacitor or run capacitor
- Open internal overload protector
- Bad start relay contact or open coil winding
- Tripped protector
- Defective compressor
Step 12: Check if the KMS and SRK hot gas valves are closed in the harvest cycle or open in the freeze cycle. Then, inspect the thermistor for defects, or for loose or disconnected wiring.
Step 13: Check for the following pump motor problems:
- Open motor winding
- Worn out bearing or locked rotor
- Defective capacitor
- Worn mechanical seal
Step 14: Finally, check the TXV for a loose bulb or erratic operation. If the problem is not yet resolved, refer to the Service Manual for a complete list of possible causes.