Condition Fault Remedy
Dew point too high.
Air inlet temperature too high.
Check and correct; see section
Reference conditions and limitations.
Fuses blown. Check fuses and remedy the cause.
Shortage of refrigerant. Have circuit repaired or recharged.
Refrigerant compressor does not
run.
See below.
Evaporator pressure is too high. See below.
Condenser pressure is too high. See below.
Condenser pressure
too high or too low.
Fan control switch out of order.
Have switch replaced.
Condenser fan motor out of order. Have fan motor inspected.
Ambient temperature too high.
Improve ventilation of compressor
room, see section Installation
proposal.
Condenser externally clogged. Clean condenser.
Motor of refrigerant
compressor stops or
does not start.
The internal thermal protection of the
motor has tripped.
Compressor will restart when the
motor windings have cooled down.
Electric power supply to refrigerant
compressor interrupted.
Check and correct as necessary.
Evaporator pressure
is too high or too low.
Condenser pressure too high or too
low.
See above.
Shortage of refrigerant. Have circuit repaired or recharged.
Hot gas bypass valve incorrectly set
or out of order.
Have the valve adjusted or replaced.
Condensate trap
continuously
discharging air and
water.
Automatic drain out of order.
Have the drain checked. Replace as
necessary.
Timer drain
inoperative.
Drain system clogged.
Clean the filter of the automatic drain
by opening the manual drain valve.
Desiccant dryer
For compressors with a desiccant dryer:
Instruction book
74 2920 7219 10
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