Atlas Copco GA 5 Instruction Book page 160

Condition
1 Pressure dewpoint too high
2 Condenser pressure too high
or too low
3 Compressor stops or does not
start
4 Electronic condensate drain
remains inoperative
Condensate trap continuously
discharges air and water
5 Evaporator pressure is too high
or too low at unload
158
Fault
Air inlet temperature too high
Ambient temperature too high Check and correct; if necessary, draw
Shortage of refrigerant
Refrigerant compressor (M1)
does not run
Evaporator pressure too high
Condenser pressure too high
Fan control switch out of order Replace
Fan blades or fan motor out of
order
Ambient temperature too high Check and correct; if necessary, draw
Condenser externally clogged Clean condenser
Electric power supply to
compressor is interrupted
Thermal protection of
refrigerant compressor motor
has tripped
Electronic drain system
clogged
Automatic drain out of order
Hot gas bypass valve
incorrectly set or out of order
Condenser pressure too high
or too low
Shortage of refrigerant
Instruction book
Remedy
Check and correct; if necessary, clean
the aftercooler of the compressor
cooling air via a duct from a cooler
place or relocate the compressor
Have circuit checked for leaks and
recharged
See 3
See 5
See 2
Check fan/fan motor
cooling air via a duct from a cooler
place or relocate the compressor
Check and correct as necessary
Motor will restart when motor windings
have cooled down
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.
Have system checked. If necessary,
replace the automatic drain.
Have hot gas bypass valve adjusted
See 2
Have circuit checked for leaks and
recharged
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