English
5.906-441.0 Rev. 01 (06/10)
35
6
Troubleshooting
Fault
Remedy
Appliance is not
running; indicator
lamp links green
Operational readiness period (30 min-
utes) has expired. Switch on/off the appli-
ance again.
Self shut-off after 30 minutes; switch on/
off the appliance again.
Unit does not work
Check/replace supply voltage, connecting
cables and power fuse.
Check the fuse (F1).
Check appliance switch (continuity test),
replace if required.
Check pressure switch; replace it, if re-
quired.
Check the control transformer/replace the
fuse
Check/replace the temperature fuse
Check/replace control board and soft start
Check/replace contactor (K1)
Phase failure pro-
tection or winding
protection switch
have been triggered
Switch off appliance and let it cool down.
Remove the cause of the problem. Turn
on the appliance again.
Device is not build-
ing up pressure
Check/raise the water input amount.
Check/clean/replace the water fine filter.
Appliance ventilation:
Check/replace high-pressure nozzle.
Check/replace the pressure and suction
valves
Check/adjust/replace overflow valve.
Appliance continu-
ously turns on and
off while hand spray
gun is closed
Check hand spray gun for leaks and re-
place if necessary.
Check the O-rings on the high pressure
hose for leaks, replace if necessary.
Check the pressure holding valve for
leaks/replace the O-rings.
Check/adjust/replace overflow valve.
Check/replace the pressure switch and
control piston.
Check/replace electronics.
The appliance does
not switch off after
the switch off delay
when the gun is
closed
Check/adjust/replace overflow valve.
Check the pressure holding valve for
leaks/replace the O-rings.
Check/replace the pressure switch and
control piston.
Check/replace electronics.
Water escapes be-
tween the cylinder
head and the pump
housing
3 drops/minute are allowed.
Check/replace high pressure and low
pressure seals.
Oil escapes be-
tween the cylinder
head and the pump
housing
Replace the oil seals.
Pump is vibrating
Appliance ventilation:
Check pump for leaks.
Fix the leaks.
Fault
Remedy