Atlas Copco GA 11+ Instruction Book page 124

Condition
Compressor does not unload,
safety valve blows
Condition
Compressor air output or pressure
below normal
Condition
Safety valve blows
Condition
Compressor element outlet
temperature or delivery air
temperature above normal
122
Fault
Solenoid valve out of order
Inlet valve does not close
Fault
Air consumption exceeds air
delivery of compressor
Choked air filter element
Solenoid valve malfunctioning
Oil separator clogged
Air leakage
Safety valve leaking
Compressor element out of order
Fault
Minimum pressure valve
malfunctioning
Oil separator clogged
Safety valve out of order
On Full-Feature compressors, dryer
piping clogged due to formation of
ice
Fault
Oil level too low
On air-cooled compressors,
insufficient cooling air or cooling air
temperature or relative humidity is
too high
Oil cooler clogged
By-pass valve malfunctioning
Air cooler clogged
Compressor element out of order
Degraded oil
Instruction book
Remedy
Replace valve.
Have valve checked.
Remedy
Check equipment connected.
Replace filter element.
Replace valve.
Have element replaced.
Have leaks repaired.
Have valve replaced.
Consult Atlas Copco.
Remedy
Check and have defective parts
replaced.
Have element replaced.
Have valve checked. Replace if
necessary.
Have system checked by Atlas
Copco.
Remedy
Check and correct, see
Operation instructions / During
operation
Check for cooling air restriction
or improve ventilation of the
compressor room. Avoid
recirculating of cooling air. If
installed, check capacity of
compressor room fan.
Clean cooler.
Have valve tested.
Clean cooler.
Consult Atlas Copco.
Check service intervals, see
Preventive maintenance
schedule.
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