Warranty and product liability
Use only Atlas Copco authorised genuine parts. Any damage or malfunction caused by the use of unauthorised
parts is not covered by Warranty or Product Liability.
General
The following remarks should be kept in mind:
• Keep the dryer clean.
• On air-cooled dryers, brush or blow off the finned surface of the condenser regularly.
On water-cooled dryers, regularly check for water leaks.
• Regularly test the EWD.
8.3 Problem solving
Faults and remedies
Condition Fault Remedy
- Pressure dew-point too high Ambient temperature too high Check and correct; if necessary, draw
cooling air via a duct from a cooler
place or relocate dryer
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
Cooling water system clogged Have cooling water system cleaned
Cooling water temperature too
high
Check and correct as necessary
- 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
High-pressure switch tripped See above
- Condensate drain remains
inoperative
Automatic drain system
clogged
Have system inspected
- Condensate trap continuously
discharges air and water
Automatic drain system out of
order
Have system checked
- 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
Instruction book
2920 1728 05 137
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