Condition Fault Remedy
Ambient temperature too high Check and correct; if necessary,
draw cooling air via a duct from a
cooler place or relocate the dryer
Air inlet pressure too low Increase inlet pressure
Adjust the pressure switch
Dryer capacity exceeded Reduce air flow
Shortage of refrigerant Have circuit checked for leaks and
recharged
Refrigerant compressor does
not run
See 3
Evaporator pressure too high See 5
Condenser pressure too high See 2
2 Condenser temperature too
high or too low
Fan 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 room or relocate the dryer
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
Reset the thermostatic protection
Restart of the dryer has been
too fast, not enough time for
pressure balancing
Wait a few minutes and restart
4 The condensate drain
remains inoperative
Drain system clogged Have system inspected
5 Evaporator pressure is too
high or too low at unload
Hot gas by-pass valve
incorrectly set or out of order
Have hot gas by-pass valve adjusted
Condenser pressure too high
or too low
See 2
Shortage of refrigerant Have circuit checked for leaks and
recharged
Instruction book
2920 7112 50 29
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