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TROUBLESHOOTING
FAULT
Motor stops due to circuit breaker relay
intervention.
High oil consumption.
Oil leak from suction filter.
Safety valve opens continually.
Compressor overheating.
The compressor is running but does not
compress air.
The compressor continues to compress air
above the maximum pressure.
Oil located in the cabinet / housing
Tank pressure drops continually.
Tank pressure won't build up or performance
is reduced.
The compressor won't switch off.
Tank pressure won't build up.
There is a leak from the base of the pressure
switch when the compressor is running.
There is a leak from the base of the pressure
switch when the compressor is stopped.
The compressor is noisy with metallic clangs
/ knocks.
The compressor sounds like it is trying to start
(motor makes a humming noise).
Overload switch activated.
Air leaks from the safety valve at pressures less
than 10 bar.
Compressor stops and will not restart.
CAUSE
Supply voltage is incorrect.
Motor over-heating.
Faulty drainage.
Oil level too high.
Faulty seal on the oil separator nipple.
Suction adjuster does not close properly.
Pressure too high.
The suction adjuster does not close at cycle end.
Environmental temperature is too high.
Radiator is blocked.
Oil level is too low.
The electrovalve does not start-up.
The adjuster is closed, it does not open because it is
dirty or has no command.
The adjuster is open, it does not close because it is dirty
or has no command.
Faulty pressure transducer.
Leaking pipes / loose connections.
Air leak, check all connections.
The drain valve is open.
Pressure switch fails to stop motor. Faulty pressure switch.
The compressor head gasket or valve plate is faulty.
Failure of the pressure relief valve. (Located in the base of
pressure switch).
The non-return valve (from the tank) is leaking.
Bearing problem.
Low oil level.
Faulty capictor or fault within the electric motor.
Startup load may have activated overload switch.
Extension lead is too long (if in use)
Head unloader not functioning.
The safety valve is faulty.
Power failure.
Motor failure.
REMEDY
Check / correct the voltage, press Reset button to restart.
Check motor absorption and check relay calibration.
If absorption is normal press Reset and re-start.
Check the oil drainage pipe and the non-return valve.
Check the oil level and discharge if necessary.
Replace the oil-separator nipple seal.
Check the adjuster and the electrovalve
Check pressure transducer & calibration
Check adjuster and electrovalve
Check the difference between the line pressure and the oil
Increase ventilation.
Clean the radiator using solvent.
Add oil.
Check the command relay and fan motor.
manually. If necessary, disassemble and clean.
Check the presence of the signal between the pressure
gauge and electrovalve. Replace any damaged parts.
Disassemble and replace the adjuster
Check the presence of the signal between the pressure
gauge and electrovalve. Replace any damaged parts.
Replace the transducer.
Check pipes and tighten connections as required.
Replace the sealing rings.
Locate and rectify leak. Run the compressor at maximum pressure
then switch off and disconnect. Brush a soapy water solution over
the connections and look for bubbles. Tighten any connections
showing leaks. If problem persists contact your authorised service
agent.
Close the tank drain valve.
Contact your authorised service agent.
Contact your authorised service agent.
Contact your authorised service agent.
Disassemble and clean, if necessary replace valve insert.
Contact your authorised service agent.
Stop the compressor and contact a specialized service technician.
Top up with oil.
Stop the compressor and contact a specialized service technician.
Leave for a few minutes then press the reset button and restart.
Remove the extension lead and test compressor by connecting the
compressor as close to the main fuse box as possible.
Stop the compressor and contact a specialized service technician.
Replace the safety valve.
Check electrical supply and fuse.
Contact your authorised service agent.
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