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 7109 23
117
