0906-E
17
COMPRESSOR CONTROL
Function
Compressor steps are started and stopped in a pre-determined order which minimized the effect of the
« anti- short cycle protection and equalized running time.
Description
$ Compressor Starting and Stopping Sequences
This Sequence is determined by the calculated compressor running time. This control also includes the
automatic and instantaneous back up of a compressor by another one if it becomes unavailable.
The crankcase heater is supplied when the compressor is turned off. More the feed back of the carter
resistance circuit breaker is connected with the ON/OFF unit circuit.
$ Starting and Stopping Compressors
Compressor XXX starts if all the following conditions are met :
"
The water circulation pump has been running for at least 1 minute.
"
Remote ON/OFF switch for the complete unit is ON
"
The ON/OFF control for the considered circuit is ON
"
The unit, the compressor and the circuit do not have any “Majors Alarm” ON
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The control requires the start-up of a compressor.
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XXX is the compressor with the lowest run time amongst the stopped compressor. To see the run times
for each compressor refer to menu: 2419, 2429….2469
"
Compressor XXX was not started for at least 6 minutes. The state of each compressor can be checked in
the following menu: 2412, 2422, 2432…, 2462
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