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MC0322 through MC2148
Air, Water, and Remote Cooled Service Manual
January 2022
Page 25
Electrical Component Details
Discharge temperature sensor.
• Thermistor attached to the discharge line near the compressor. Reported temperature used by the controller
to determine end-of-cycle-fan-off-delay time. If discharge temperature exceeds a preset maximum, controller
will shut the machine off.
Note: Controller will operate machine in a default mode with thermistors disconnected from the
controller. Diagnostic code #5 or 7 will be displayed during that time.
Component Indicator Lights
System Indicator Light ON
Condenser Fan or Liquid Line Valve
Fan Motor Powered or LLV open
Water
Pump
Pump
Motor
Powered
Purge
Valve
Purge
Valve
Opens
Inlet Water Solenoid Valve
Inlet Water Valve Opens
Hot
Gas
Hot
Gas
Valve
Opens
Compressor
Contactor
Contactor
Closes
Ready to Harvest
Water contacting ice thickness sensor probe
Sump Empty
Open between mid sensor and common
Sump Full
Closed between top probe and mid probe
Curtain
Switch
Curtain
open