Idiomas disponibles
Idiomas disponibles
Problem
Air leak from the valve of the pressure
switch
Reduction of efficiency, frequent start-
up. Low pressure values
The motor and/or the compressor
overheat irregularly
Motor hums or stops, due to tripping of
the motor reset, after the first attempt
to start the air compressor
During operation, the compressor
stops for no apparent reason
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
Irregular presence of oil in the network Too much oil inside the pump
Leaking of condensate from the tank
drain valve
TROUBLESHOOTING
Possible Cause
Check valve does not perform its
function correctly due to wear or dirt on
the seal
Tank drain valve is open
Nylon hose not inserted correctly in
pressure switch
Excessively high consumption
Leaks from joints and/or pipes
Clogging of the intake filter
Slipping of the belt
Insufficient ventilation
Closing of air ducts
Insufficient lubrication
Start-up with head of the compressor
charged
Conditions are too cold
Voltage too low
Incorrect or insufficient lubrication
Pressure switch failure
Tripping of the thermal cutout of the
motor
Electric fault
Faulty capacitor
Excessive piston ring wear
Excessive dirt inside the drain valve
20
Solution
Drain tank pressure completely.
Unscrew the hex-shaped head of the
check valve, clean the housing and the
special rubber disk (replace if worn).
Re-assemble and tighten carefully
Close the tank drain valve
Insert the nylon hose correctly inside
the pressure switch
Decrease the demand of compressed
air
Change gaskets
Clean/replace the intake filter
Check or improve belt tension. See page 17.
Improve ambient conditions
Check and if necessary clean the air
filter
Add or change oil
Release/purge the head pressure by
moving the pressure switch lever to 'OFF'
Gradually warm the air compressor or
try starting after opening the tank drain
Make sure the voltage matches that of
the motor nameplate
Check oil level. Add if needed or
change the oil
Contact ROLAIR Customer Service
Check oil level
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
Contact ROLAIR Customer Service
Have the capacitor replaced
Check oil level
Contact ROLAIR Customer Service
Clean or replace the tank drain
