Condition Fault Remedy
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
Condensate drain remains
inoperative
Drain system clogged Have system inspected
Clean the filter of the drain by opening the
manual drain valve.
On units with an electronic drain, check
functioning of the drain by pushing the test
button.
Condensate trap continuously
discharges air and water
Drain out of order Have system checked. If necessary,
replace the 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 7180 30 165
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