Karcher KB 3.99 M Troubleshooting, Appliance is not running, Strong pressure fluctuations, Danger

Troubleshooting

You can rectify minor faults yourself with the help of the following overview.

If in doubt, please consult the authorized customer service.

￿Danger

Turn off the appliance and remove the mains plug prior to any care and mainte- nance work.

Repair works may only be performed by the authorized customer service.

Appliance is not running

ÎCheck whether the voltage indicated on the type plate corresponds to the volt- age of the mains supply.

ÎCheck the mains connection cable for damages.

Pressure does not build up in the appli- ance

ÎCheck setting at the spray lance.

ÎAppliance ventilation: Switch the appli- ance on with the high-pressure hose de- tached and operate until the water flows through the high-pressure connection without bubbles. Switch off appliance and reconnect high-pressure hose.

ÎCheck the water supply.

ÎPull out the sieve in the water connec- tion using flat-nose pliers and clean un- der running water.

Appliance does not start, motor hums Cause: Voltage reduction due to weak mains supply or when using an extension cable.

ÎWhen switching on, first pull the lever of the trigger gun and then switch the ap- pliance switch to "I/ON".

Strong pressure fluctuations

ÎClean high-pressure nozzle: Remove dirt and debris from the nozzle bore, us- ing a needle and rinse through with wa- ter from the front.

ÎCheck water flow quantity.

Appliance is leaking

ÎSlight leakage from the appliance pump is normal. If the leakage increases con- tact the authorized customer service.

No detergent infeed

ÎUse spray lance with pressure regula- tion (Vario Power).

Turn the spray lance to "Mix" position.

ÎClean the detergent suction hose filter.

ÎCheck the detergent suction hose for kinks.

English 9