Cornelius IAC330, IAC 322, IAC227, CR800, CR1200 High Pressure Safety Switch, Compressor Run-On

Chemical analysis is the key requirement to the definition of “Reclaim”. Regardless of the purity levels reached by a re-processing method, the refrigerant is not “reclaimed” unless it has been chemically analyzed and meets ARI Standard.

HIGH PRESSURE SAFETY SWITCH

All water-cooled and remote products contain a high pressure safety cut-out switch. The function of this switch is to shut down the cuber should excessive pressure develop in the high side of the refrigeration system. This switch will open the power supply at 450 PSI (30.61 BAR) high side pressure. Should this control open, it must be reset manually and the cause for the increase in pressure determined.

COMPRESSOR RUN-ON

Contactor remains energized when curtains are in a full bin condition – compressor runs but water pump and condenser fan (AC) are off.

1.Check VAC at contactor coil with an analog voltmeter (dial type, not digital).

A.Voltage at the contactor coil 12 VAC or higher may hold the coil energized. Turn the power switch OFF, if contactor de-energizes, replace the circuit board, the snubber circuit is leaking.

B.Should you find 1/2 normal line voltage, replace the circuit board, the triac is shorted.

C.If no voltage or very low voltage (6 VAC or less) is present and plunger is still closed, replace the con- tactor.

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Rev 3/4/96