Quincy QGS 40, Instruction Book, Page: 88 / 132

Instruction book
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- Condition Fault Remedy
Oil cooler clogged Clean cooler
Thermostatic bypass valve
malfunctioning Have valve tested
Air cooler clogged Clean cooler
Compressor element out of order Consult your supplier
Oil filter clogged Replace
Dryer
(Compressors with an integrated dryer)
For all references hereafter, consult section Air dryer .
Condition Fault Remedy
1 Pressure dew point too high Air inlet temperature too high Check and correct; if necessary,
clean the aftercooler of the
compressor
Ambient temperature too high Check and correct; if necessary, draw
cooling air via a duct from a cooler
place or relocate the compressor
Shortage of refrigerant Have circuit checked for leaks and
recharged
Refrigerant compressor (M1)
does not run See 3
Evaporator pressure too high See 5
Condenser pressure too high See 2
2 Condenser pressure too high
or too low Fan control switch out of order Replace
Fan blades or fan motor out of
order Check fan/fan motor
Ambient temperature too high Check and correct; if necessary, draw
cooling air via a duct from a cooler
place or relocate the compressor
Condenser externally clogged Clean condenser
3 Compressor stops or does not
start Electric power supply to
compressor is interrupted Check and correct as necessary
Thermal protection of
refrigerant compressor motor
has tripped Motor will restart when motor
windings have cooled down
4 Electronic condensate drain
remains inoperative
Electronic drain system
clogged Have system inspected
Clean the filter of the automatic drain
by opening the manual drain valve.
Check functioning of the drain by
pushing the test button.
Condensate trap continuously
discharges air and water Automatic drain out of order Have system checked. If necessary,
replace the automatic drain.
5 Evaporator pressure is too
high or too low at unload Hot gas bypass valve
incorrectly set or out of order Have hot gas bypass valve adjusted