Instruction Book
9828 0934 73
107
7.1.1 Faults and remedies (general)
Condition
Fault
Remedy
Pressure dew-point too high
Air inlet temperature too high
Check and correct; if necessary,
install a pre-cooler
Ambient temperature too high
Check and correct; if necessary, draw
cooling air via a duct from a cooler
place or relocate dryer
Air inlet pressure too low
Increase inlet pressure
Dryer capacity exceeded
Reduce air flow
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
Automatic drain system
clogged
Have the system cleaned
Condenser pressure too high or too
low on air-cooled dryers
Fan control switch out of order
Replace
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
place or relocate dryer
Condenser externally clogged
Clean condenser
Compressor stops or does not start
Electric power supply to
compressor is interrupted
Check and correct as necessary
Motor overload protection of
refrigerant compressor motor has
tripped
Have motor checked
For resetting: see the section
Electrical system
High-pressure switch tripped
See above
Condensate drain remains
inoperative
Automatic drain system
clogged
Flush the assembly by opening
manual drain valve.
Have system inspected
Condensate trap continuously
discharges air and water
Automatic drain system out of
order
Have system checked. If necessary
replace automatic drain
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 above
Shortage of refrigerant
Have circuit checked for leaks and
recharged
