English
5.905-945.0 Rev. 00 (06/15)
25
8
Troubleshooting
Findings
Possible cause
Correction
Appliance is not running
Power supply interrupted
Check connection cable for damages.
Check mains fuses and mains voltage
Disturbances in the electrical sys-
tem
Check / replace transformer.
Check/replace the fuse.
Check thermal motor protection switch.
Check / replace the contactor.
Check/replace the PCB.
Power switch
Check/replace the appliance switch.
Pressure switch
Check/replace the pressure switch.
Appliance is not building up pressure
Nozzle soiled
Set nozzle to "High pressure".
Clean the nozzle.
Replace the nozzle.
Air within the system
Vent appliance.
Insufficient water quantity
Check water supply level (refer to technical
data).
Suction area blocked
Clean the sieve in the water connection.
Check all inlet pipes to the pump.
Pressure interruption
Check the pressure and suction valves for
leaks / replace.
Check / adjust/ replace overflow valve.
Device turns on and off while hand
spray gun is closed
Tightness of system
Check the trigger gun and the O-rings on
the high-pressure hose for leaks / replace.
Pressure interruption
Check / adjust/ replace overflow valve.
Check / replace the pressure retaining
valve.
Check/replace the pressure switch.
Check / clean / replace the detergent
check valve.
Check the pressure and suction valves for
leaks / replace.
Appliance does not switch off when the
hand-spray gun is closed
Pressure interruption
Check / adjust/ replace overflow valve.
Check / replace the pressure retaining
valve.
Check/replace the pressure switch.
Detergent is not being sucked in
Low or no detergent flow
Check/ clean detergent suction hose with
filter.
Open or check/clean detergent dosing
valve.
Check / clean / replace the detergent
check valve.
Check / replace nozzle for detergent.
Replace detergent injector.
Pump leaky
Water leak between the cylinder
head and the piston casing
Check / replace high pressure and low
pressure seals.
Oil leaks between the cylinder head
and the piston casing
Replace oil seals.