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9. Trouble-shooting
Malfunction
Possible cause
Remedy
Unit switches off
1. Ambient temperature too high
1. Ventilate compressor room
2. Ventilator defective
2. Check el. motor and protective motor switch
3. >>E<< appears on the pressure or
3. Check sensors, connections and lines
temperature displays
4. Cross-section of the electric supply lines 4. Measure power requirement, if necessary,
too small
replace lines
5. Power requirement too high
5. Oil fine separator or air filter cartridge
clogged; replace, if necessary
6. Oil level too low
6. Top up oil in the pressure reservoir
7. Oil injection pressure too low
7. Replace oil filter cartridge, clean oil system
8. Excessive oil temperature
8. Check oil cooler and ventilator
Excessive idling pressure 1. Intake regulator does not close correctly 1. Check intake regulator and solenoid valves
(19 + 20)
2. System not unloaded
2. Check solenoid valve (19) and lines
Oil in the compressed air 1. Oil fine separator defective
1. Replace
2. Oil foams
2. Change oil, blow-off time too short
3. Oil level too high
3. Drain off oil
4. Opening pressure of the pressure
4. Check pressure holding valve
control valve too low
5. Check valve 14 defective
4. Replace check valve
Oil in the air filter
1. Packing spool in the intake regulator
1. Check sliding fit and sealing surface and
defective
replace, if necessary
2. Intake regulator does not close correctly 2. Check intake regulator and solenoid valves
- 19 + 20 -
3. Blow-off time too short
3. Extend time (nozzle)
4. Check valve defective
4. Remove check valve
Safety valve opens
1. Safety valve defective
1. Replace
2. Oil fine separator clogged
2. Replace
3. Intake regulator closes too slowly
3. Check intake regulator and solenoid valves
- 19 + 20 -
4. Pressure monitoring device defective
4. Replace
5. Electronics defective
5. Replace
6. Solenoid valves - 19 + 20 - defective
6. Replace
