Ice-O-Matic CIM Series, Technical & Service Manual

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ELEVATION SERIES CIM CUBER HIGH PRESS CUT‐OUT AND FAN CYCLE SWITCH
50
High Pressure Cut-out and Fan Cycle Switch
High Pressure Cut-out (left)
The High Pressure Cut‐out is set to open at 450 psig and de‐energizes the Contactor as a safety
on the unit.
Fan Cycle Control (right)
The Fan Cycle Control helps maintain head pressure in cooler ambient temps. The control closes
at 250 psig, energizing the Fan Motor and opens at 200 psig.
Troubleshooting
High Pressure Cut-out
The High Pressure Cut‐out opens at 450 psig to de‐energize the Contactor and shutdown the
Compressor. The control re‐closes at 350 psig. Should the control open during the Freeze Cycle,
the unit may go into Error 1 state, indicating the Freeze Cycle has run for more than 1 hour. To
quickly check the unit operating pressure, run a Diagnostic Cycle with stub gauges on the unit.
A dirty or blocked Condenser, failed Fan Cycle Control, failed Fan Motor, high side restriction or
refrigerant over charge can be the cause.
Fan Cycling Control
The Fan Cycle Control closes on pressure rise at 250 psig and opens on pressure drop at 200 psig
to maintain head pressure in cooler ambient conditions. The cut‐in and cut‐out should never be
erratic. Should the contacts of the control close and/or open outside these parameters, the con‐
trol should be replaced.