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20
TROUBLESHOOTING
Problem Possible Cause Solution
Air leak from the valve of the pressure
switch
Check valve does not perform its
function correctly due to wear or dirt on
the seal
Unscrew the hex-shaped head of the
check valve, clean the housing and the
special rubber disk (replace if worn).
Re-assembler and tighten carefully
Condensate drainage cock open Close the condensate drainage cock
Rilsan hose not inserted correctly in
pressure switch
Insert the Rilsan hose correctly inside
the pressure switch
Reduction of efficiency, frequent start-
up. Low pressure values
Excessively high consumption Decrease the demand of compressed
air
Leaks from joints and/or pipes Change gaskets
Clogging of the suction filter Clean/replace the suction filter
Slipping of the belt Check V-belt tension
The motor and/or the compressor
overheat irregularly
Insufficient ventilation Improve ambient conditions
Closing of air ducts Check and if necessary clean the air
filter
Insufficient lubrication Top up or change oil
After an attempt to start the
compressor, it stops due to tripping of
the thermal cutout caused by forcing of
the motor
Start-up with head of the compressor
charged
Release the compressor head by using
the pressure switch push button
Low temperature Improve ambient conditions
Voltage too low Check that the mains voltage matches
that of the dataplate. Eliminate any
extensions
Incorrect or insufficient lubrication Check level, top up and if necessary
change the oil
Inefficient electrovalve Take compressor to the service center
During operation, the compressor
stops for no apparent reason
Tripping of the thermal cutout of the
motor
Check level oil
Operate on the lever of the pressure
switch returning this to the OFF
position.
Reset the thermal cutout and restart.
If the fault persists, take the
compressor to the service center
Electric fault Take compressor to the service center
When operating, the compressor
vibrates and the motor emits an
irregular buzzing sound. If it stops, it
does not restart although the sound of
the motor is present
Faulty capacitor Have the capacitor replaced
Irregular presence of oil in the network Too much oil inside the unit Check oil level
Wear on segments Take compressor to the service center
Leaking of condensate from the vent
cock
Presence of dirt/grit inside the cock Clean the cock