TROUBLESHOOTING
Warning:
All Maintenance work must only be done after the compressor has been cut off the power
supply and after the air within the tank has been released.
Problem
Possible Causes
Solution
Engine does not rotate
and makes no sound
1.Power disconnected
2.Pressure switch disconnected
3.Fuse burnt
4.Overload protector is in state of pro-
tection
5.Pressure switch damaged
6.Engine stator burnt
1.Check the connection switch
2.Check the pressure switch
3.Replace the fuse
4.Restart the machine after engine cooled down
5.Contact an authorized service partner
6.Replace the stator
Current sound exists but
fails to run or runs
slowly
1.Voltage is too low
2.Engine winding short circuit
3.Check valve or pressure switch failure
1.Check voltage, must not be 10 % lower than rated
voltage
2.Contact an authorized service partner
3.Contact an authorized service partner
Overload protector cuts
the power frequently
1.Voltage is too low
2.Bad ventilation and high temperature
1.Check voltage, must not be 10 % lower than rated
voltage
2.Move the compressor to a ventilated area
Air pressure reduced
when machine turned off
1.Air pipe loose or leaking
2.Water drain valve open
3.Check valve leakage
1.Check and fix it
2.Tighten the drain valve
3.Remove and clean it, replace when necessary
Plenty of water in
delivered air
1.Plenty of water in the tank
2.Humidity is too high
1.Drain the water in the tank out
2.Move the compressor to a cooler place or use oil
water separator
Compressor fails to
Stop running
1.Pressure switch damaged
2.Foot pad damaged or missing
1.Replace the pressure switch
2.Check and eliminate
Compressor vibration
1.Fasten the loose part
2.Foot pad damaged or missing
1.Check and eliminate
2.Replace the foot pad
Pressure fail to reach
the rated one or not
able to increase
1.Water drain valve open
2.Air filter blocked
3.Air leakage
4.Valve clack malfunction or air leakage
5.Piston rubber bowl wear and tear
1.Tighten the water drain valve
2.Clean and replace the air filter element
3.Check and eliminate
4.Clean or replace
5.Replace piston rubber bowl
© by WilTec Wildanger Technik GmbH
Seite 19
http://www.WilTec.de
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