Kärcher HD 6/16-4 ST-H Bedienungsanleitung Seite 26

Fault
Water stream is uneven.
Inadequate or no flow of de-
tergent
Pressure does not build up
in the pump
High pressure pump is
knocking; manometer is
swaying wildly
The installation does not
start when switched on or
when pressing the remote
control (optional).
Pump starts during the
stand-by period and not
when the hand spray gun is
opened.
Installation does not switch
off.
26
English
Possible cause
Nozzle is blocked.
Amount of water supply is too low.
Dosage adjusted too low.
Suction filter in the detergent tank is
dirty.
Detergent suck hose leaking.
Manual detergent dispensing valve de-
fective.
Suction site pipe leaking.
Not enough water
High pressure hose leaking.
Piping leaking.
Flow regulator defective.
The valve in the pump is defective.
Vibration dampener is defective.
Water pump does not suck in ade-
quate air.
Detergent container is empty
Water flow temperature too hot.
Water flow blocked.
Valve plate or valve spring is defective. Replace parts
Advance pump calcified or defective.
Pressure switch is defective
Motor protection switch was trigged by
overflow or loss of a phase of the elec-
tricity supply.
Motor protection switch is set incor-
rectly.
On-board electricity supply interrupt-
ed.
Emergency-stop switch is turned off.
Motor protection switch for controls
and advance pressure pump triggered.
Control safety transformer defective.
Circuit board defective.
Pressure switch or pressure switch ca-
ble defective.
Pump is drawing in air over the empty
detergent tank.
Low pressure switch defective.
Remedy
Clean the nozzle.
Check water supply.
Increase dose.
Clean the suction filter.
Replace suck hose.
Check; replace, if required.
Check screw fittings and hoses.
Ensure adequate water supply.
Replace high pressure hose.
Repair piping system.
Test flow regulator, repair.
Replace valve.
Replace vibration dampener.
Check suction system and remove leaks.
Refill detergent tank.
Lower water temperature.
Clean sieve in the water inlet, check the wa-
ter flow.
Check advance pump.
Replace pressure switch.
Check the voltage of the three phases.
Adjust according to circuit diagram.
Turn it on.
Turn it on.
Check motor protection switch.
Examine the cause, replace the control safe-
ty device.
Check circuit board, replace if required.
Replace the pressure switch or cable.
Refill the detergent tank, ventilate suction
line.
Replace pressure switch.
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