Condition Fault Remedy
Shortage of refrigerant Have circuit checked for leaks and
recharged.
Refrigerant compressor does
not run
See below.
Evaporator pressure too high See below.
Condenser pressure too high See below.
Condenser pressure too high
or too low
Fan control switch out of
order
Replace.
Fan blades or fan motor out of
order
Have checked fan/fan motor, if necessary
replace.
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.
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.
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.
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.
Condenser pressure too high
or too low
See above.
Shortage of refrigerant Have circuit checked for leaks and
recharged if necessary.
Instruction book
2920 7110 05 101
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