Operating instructions
Trouble shooting
18
104485 • 03/03
System fails to shift to no-load operation or to standstill
Safety valve blows off
System is operating but is producing no pressure
Abnormal noises
Potential reasons
Actions
Pressure control valve is defective.
•
Replace pressure control valve.
Potential reasons
Actions
Pressure detector is set at a too high rate.
•
Correct settings of pressure sensor.
Pressure sensor is defect.
•
Replace pressure sensor.
Safety valve is defective.
•
Replace safety valve.
Suction stop valve does not close completely.
•
Check springs of the suction stop valve.
Solenoid valve is defective.
•
Replace solenoid valve.
Oil high-precision separator cartridge is used
up.
•
Replace oil high-precision separator car-
tridge.
Proportional controller nozzle is clogged
(only with proportional control).
•
Clean proportional controller nozzle.
Potential reasons
Actions
Membrane in the adjust cylinder of the reduc-
ing damper is defective (depending on the
type of compressor)
•
Replace membrane and check control
pressure in the pressure control valve.
The relief valve is defective.
•
Replace relief valve.
Pressure control valve is leaky.
•
Replace pressure control valve.
Potential reasons
Actions
“Whistling” sound caused by compressed air
escaping the supply network, fittings etc.
•
Remedy leaking points.
•
Replace the seals.
•
Tighten the screw connections.
The safety valve is “crackling”.
•
Check pressure settings.
•
Check and replace safety valve if neces-
sary.
Fan is knocking.
•
Check whether the fan does not scrape.
Grinding noises
•
Damage in the mounting, compressor
needs repair.
•
Damage in the mounting, motor needs
repair (BLITZ service).
