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8. POSSIBLE PROBLEMS AND REMEDIES
Before any inspection unplug from the electricity supply and drain the
compressed air completely from the tank.
PROBLEM CAUSE REMEDY
Air leaks through the
pressure switch when the
compressor is stopped.
Non return valve worn or
dirty not working properly.
Dismantle the non return
valve head, clean rubber
disc and-or replace it.
Reassemble with care.
Reduction in performan-
ce, starting too often, low
pressure.
If the demand on the air
supply remains the same,
check for air leaks on
pipe and hoses, the
conditions of the intake
filter or belt-driven
regulation.
Replace the seals of the
fittings, clean or change
air intake cartridge.
Recheck the regulation of
belts.
The compressor stops
after trying to start or
stops and will not start
again.
Overload cut-out switch
has occured (low ambient
temperature - improper
voltage or lubrication) -
bad connection.
Check all parameters as
before. After a few
minutes press the re-set
button. If the problem is
not resolved contact
specialist service
organisation.
The motor or the pump
overheats. On the
threephase motor
overheats makes
excessive noise and
vibrations.
Not enough cooling air on
the motor or the pump.
The motor rotates in
wrong direction.
Improper voltage.
Check ambient
temperature, rotating
direction, oil level and
quality intake filter, proper
voltage in all phases
(electric wiring diagram).
Anomal presence of oil in
the compressed air.
Excessive oil level.
Wear of piston rings.
Check oil level.
Contact service centre.
Any other service must be carried out by an authorised Service Centre or
appointed Service Engineer using original spares. Unauthorised work on the
machine may invalide the warranty and be a safety risk.
19


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