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DANGER
Risk of electric shock.
Risk of injury! Switch off the power switch
with all maintenance and repair work.
Pull the mains plug and secure it against
being plugged in again
DANGER
Risk of injury on account of the emanating
water jet that could be hot!
DANGER
Risk of accident while working on the unit!
During all tasks:
Close locking tap of fresh water.
Let the hot parts of the plant cool down.
Depressurise the plant by opening all
hand-spray guns.
Who may remedy faults?
Operator
Work designated with the sign “Opera-
tor” may only be carried out by persons
who have been instructed in the safe
operation and maintenance on the high
pressure plant.
Electricians
Only persons with a professional train-
ing in the electro-technical area.
Customer Service
Work designated with the sign “Cus-
tomer Service” may only be done by the
fitters of Kärcher Customer Service.
Troubleshooting
Fault Possible cause Remedy of whom
Water stream is uneven. Nozzle is blocked. Clean the nozzle. Operator
Amount of water supply is too low. Check water supply. Operator
Inadequate or no flow of de-
tergent
Dosage adjusted too low. Increase dose. Operator
Nozzle is set to "High pressure". Set nozzle to "CHEM". Operator
Suction filter in the detergent tank is
dirty.
Clean the suction filter. Operator
Detergent suck hose leaking. Replace suck hose. Customer Service
Manual detergent dispensing valve oc-
cluded, defective.
Check; clean, replace, if required. Customer Service
Pressure does not build up
in the pump
Nozzle is set to "CHEM" Set nozzle to "High pressure". Operator
Air in the high pressure pump Ventilate the appliance (see "System start-
up")
Operator
Suction site pipe leaking. Check screw fittings and hoses. Operator
Not enough water Ensure adequate water supply. Operator
Sieve in the water inlet is dirty Clean sieve. Operator
High pressure hose leaking. Replace high pressure hose. Customer Service
Piping leaking. Repair piping system. Customer Service
Flow regulator defective. Test flow regulator, repair. Customer Service
The valve in the pump is defective. Replace valve. Customer Service
High pressure pump is
knocking; manometer (op-
tion) is swaying wildly
Vibration dampener is defective. Replace vibration dampener. Operator
Water pump does not suck in adequate
air.
Check suction system and remove leaks. Operator
Detergent container is empty Refill detergent tank. Operator
Water flow temperature too hot. Lower water temperature. Operator
Water flow blocked. Clean sieve in the water inlet, check the water
flow.
Operator
Valve plate or valve spring is defective. Replace parts Customer Service
Advance pump calcified or defective. Check advance pump. Operator
The installation does not
start when switched on or
when pressing the remote
control (optional).
Appliance switch is switched off Turn it on. Operator
On-board electricity supply interrupted. Turn it on. Operator
Pressure switch is defective Replace pressure switch. Customer Service
Motor protection switch was trigged by
overflow or loss of a phase of the elec-
tricity supply.
Check the voltage of the three phases. Electrician/ Custom-
er Service
Motor protection switch is set incorrect-
ly.
Adjust according to circuit diagram. Electrician/ Custom-
er Service
Motor protection switch for controls and
advance pressure pump triggered.
Check motor protection switch. Electrician/ Custom-
er Service
Control safety transformer defective. Examine the cause, replace the control safety
device.
Electrician/ Custom-
er Service
Circuit board defective. Check circuit board, replace if required. Customer Service
Pump starts during the
stand-by period and not
when the hand spray gun is
opened.
Pressure switch or pressure switch ca-
ble defective.
Replace the pressure switch or cable. Customer Service
Installation does not switch
off.
Pump is drawing in air over the empty
detergent tank.
Refill the detergent tank, ventilate suction
line.
Operator
Pressure switch is defective. Replace pressure switch. Electrician/ Custom-
er Service
25EN
25


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