Ice-O-Matic CIM Error Light Diagnostics

Fault codes and lights are designed to help technicians diagnose equipment more efficiently. However, trying to memorize each code, what they mean and how to remedy them is a chore. You could dig through a manual for hours or just follow this simple guide and video to get to the source of the problem quicker. This Ice-O-Matic CIM error light diagnostics guide is sure to help you figure out the issue and how to fix it without making the customer wait. 

Ice-O-Matic CIM Error Code 1

This code is a maximum-length freeze cycle. This indicates an hour-long freeze cycle followed by a harvest of less than 5.5 or 7 minutes, depending on the unit control board. 

• Appearance – This code is signaled by a twice-per-second flash or once-per-half-second flash of the light on the control board and the front of the unit. 
• Possible causes:
  • Condenser fan motor 
  • Compressor issue
  • Water inlet valve allowing too much water into the water trough
  • Dirty condenser, evaporator or float switch

Ice-O-Matic CIM Error Code 2

This code indicates a maximum length harvest cycle. This means the machine didn’t drop ice within 7 minutes. 

• Appearance – This code is signaled by a heartbeat-style light flash on the control board at the front of the unit. 
• Possible causes:
  • Gas valve or curtain switch isn’t opening
  • Relay or gas valve is stuck open

Ice-O-Matic CIM Error Code 3

Error code 3 means the ice machine took an hour to make a batch of ice and 7 minutes to harvest it. 

• Appearance – This code is signaled by a triple red flashing light on the front of the machine and on the control board. 
• Possible causes:
  • Compressor, water pump or condenser fan motor failure
  • Control board or relay issue
  • Harvest assist is leaking

Ice-O-Matic recommends contacting their technical support since error code 3 can be caused by many major issues.

Ice-O-Matic CIM Error Code 4

This code is an indicator that the thermistor has failed.

• Appearance – This code is signaled by a once-per-second light flash on the front of the ice machine and at the control board. 
• Possible causes:
  • Failed thermistor that needs to be replaced

Ice-O-Matic CIM Error Code 5

The Ice-O-Matic error code 5 is for a maximum length fill cycle. This means the unit took 5 or more minutes to fill. 

• Appearance – This code is signaled by two flashing lights on the front of the unit and the control board. 
• Possible causes:
  • Clogged water filter
  • Water inlet valve isn’t filling with water
  • Water to the unit is turned off 
  • Float switch issue

Ice-O-Matic CIM Error Code 6

This code indicates a maximum length purge cycle. This code can typically be seen during a cleaning mode. It can also occur during a freeze or if the machine is turned off and experiences an issue. When this occurs, the machine will try to purge for 2 minutes and then shut off for 10 minutes. It will continue to retry until the machine purges. 

• Appearance – This code is signaled by a heartbeat flashing red and yellow light on the front of the unit and the control board.
• Possible causes:
  • Water pump or purge valve failure 
  • Float switch issue

Ice-O-Matic CIM Error Code 7

Error code 7 means the unit was looking for the float switch to open within 15 seconds of the water pump turning on. If that doesn’t happen, it will repeat itself 3 times. 

• Appearance – This code is signaled by a two blink-per-second red and yellow light.
• Possible causes:
  • Float switch issue
  • Leaking water inlet valve
  • High water pressure
  • Electrical connection issue