Troubleshooting - Kärcher HD 6/15-4 Service Manual

8

Troubleshooting

8.1 Appliance is not running

Check connection cable for damages.

Check the supply voltage.

Check/replace the appliance switch.

Check/replace the pressure switch
8.2 Pressure does not build up in the appli-
ance

Set the pressure and quantity regulation to "MAX".
(Turn in a clockwise direction to the stop).

Check the nozzle size, install correct nozzle.

Clean the nozzle.

Replace the nozzle.

Vent appliance.

Check water supply level (refer to technical data).

Clean water filter.

Check all inlet pipes to the pump.

Check the settings of the transfer port.
8.3 Water is leaking at the pump
3 drops per minute are permitted and can come out
from the lower side of the appliance.

Replace high and low pressure gaskets.
8.4 Oil is leaking at the pump

Replace the oil seals.

Replace the shaft seal rings.
8.5 Pump is vibrating

Clean water filter.

Check the water suction pipes for leaks.

Deaerate the appliance (see "Start-up")
8.6 Appliance often turns on and off when
hand spray gun is closed

Check the pump for leaks.

Check the high-pressure hose and the hand spray
gun for leaks.

Check the pressure retaining valve.
English 5.906-565.0 Rev. 00 (12/12)
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