Troubleshooting - Kärcher HD 9/50-4 Cage Service Manual

6

Troubleshooting

Fault Remedy
Appliance is not Operational readiness period (30 min-
running; indicator utes) has expired. Switch on/off the appli-
lamp links green 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- Switch off appliance and let it cool down.
tection or winding Remove the cause of the problem. Turn
protection switch on the appliance again.
have been triggered
Device is not build- Check/raise the water input amount.
ing up pressure
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- Check hand spray gun for leaks and re-
ously turns on and place if necessary.
off while hand spray
Check the O-rings on the high pressure
gun is closed
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 Check/adjust/replace overflow valve.
not switch off after
Check the pressure holding valve for
the switch off delay
leaks/replace the O-rings.
when the gun is
closed
Check/replace the pressure switch and
control piston.
Check/replace electronics.
Water escapes be- 3 drops/minute are allowed.
tween the cylinder
Check/replace high pressure and low
head and the pump
pressure seals.
housing
Fault Remedy
Oil escapes be- Replace the oil seals.
tween the cylinder
head and the pump
housing
Pump is vibrating Appliance ventilation:
Check pump for leaks.
Fix the leaks.
English 5.906-441.0 Rev. 01 (06/10)
35