Condition Fault Remedy
Phase sequence relay (K25) open Find cause and remedy. Replace
if necessary.
Wiring interrupted Find cause and remedy. Replace
if necessary.
Compressor starts running, but
does not load after a delay time
Solenoid valve out of order Replace valve
Inlet valve stuck in closed position Have valve checked
Leak in control air tubes Replace leaking tubes
Minimum pressure valve leaking
(when air net is depressurised)
Have valve checked
Compressor does not unload,
safety valve blows
Solenoid valve out of order Replace valve
Inlet valve does not close Have valve checked
Condensate is not discharged
from condensate separator during
loading
Discharge tube clogged Check and correct as necessary
Compressor air output or pressure
below normal
Air consumption exceeds air
delivery of compressor
Check the connected equipment.
Choked air filter element Replace filter element
Solenoid valve malfunctioning Replace valve
Leak in control air tubes Replace leaking tubes
Oil separator element clogged Have element replaced
Air leakage Have leaks repaired.
Safety valve leaking Replace valve
Inlet valve does not fully open Have valve checked
Compressor element out of order Consult your supplier
Excessive oil consumption; oil
carry-over through discharge line
Incorrect oil causing foam Change to correct oil
Oil level too high Check for overfilling. Release
pressure and drain oil to correct
level.
Oil separator defective Replace oil separator element
Safety valve blows after loading Inlet valve malfunctioning Have valve checked
Minimum pressure valve
malfunctioning
Have valve checked
Safety valve out of order Have valve replaced
Oil separator element clogged Have oil separator element
replaced
Compressor element out of order Consult your supplier
Compressor element outlet
temperature or delivery air
temperature above normal
Oil level too low Check and correct
Instruction book
94 2920 7190 02
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