19
EN
Troubleshooting
Technicians
Problem
Possible Cause
Remedial action
Compressor does not start, or stops
and does not start again.
Bad connections
Blown fuse
Overload cut-out switch has tripped
Check all electrical connections. Clean and
tighten as necessary.
No tension or tension too low
Check connections, verify standard line
tension.
Air receiver charged
Open drain valve to expel air. Compressor
should start again when pressure reduces to 5
bar (72 psi).
Solenoid valve does not empty the delivery
pipe
Control the solenoid valve, clean or replace it.
Electric motor capacitor damaged or not
properly fitted
Check the tension at the capacitor, in case of
damage replace it.
Compressor does not reach set
pressure and overheats easily.
Inlet air filter is blocked
NOTE: It is also possible that more air is
being required than compressor is capable of
delivering
Replace air intake filter.
Compressor does not build pressure or
very low performance.
Compressor valve damaged
Replace the complete valve block including
gaskets.
Compressor piston ring consumed
Verify compressor performance and replace
the piston rings.
Air leaking from pressure switch valve
when compressor is not running.
Faulty non-return valve
First drain all air completely from receiver.
Clean or replace the non-return valve.
Air leaking from rinsing nozzle when
compressor is running (compressors
with membrane dryers).
Faulty rinsing nozzle
Clean or replace the rinsing nozzle.
Air pressure from regulator does not
adjust.
Diaphragm inside regulator body is broken.
Replace regulator.
Compressor operating, but no air from
outlet.
Inlet air filter blocked
Pressure regulator closed
Drain valve open
Replace oil filler/air filter plug.
Turn regulator clockwise to set required
pressure.
Close drain valve.
Electric motor cuts off during normal
operation.
Electric motor temperature probe switches off
the compressor to protect the motor
Too high temperature: Verify general
conditions.
Thermal switch stops the compressor
in standard conditions.
Thermal switch is damaged
Problem with piston rings
Electric motor damaged
Replace the thermal switch.
Check rings conditions.
Check if compressor starting is regular,
replace the motor.
19. Troubleshooting
The following descriptions for use in diagnosing faults are only intended for the use of technicians. Repairs may only be carried out by technicians!
