Maintenance Intervals; Troubleshooting; Indicator Lamp Pump; Maintenance Works - Kärcher HDS 7/9-4 M Manual

 Remove water connection.
 Activate hand spray gun until device is
pressure less.
 Secure the trigger gun. To do so, push
the safety catch towards the front.
 Allow device to cool down.
Your Kärcher vender will inform you
about the performance of a periodic
safety inspection resp. signing of a
maintenance contract.

Maintenance intervals

Weekly
 Clean the sieve in the water connection.
 Clean the fine filter.
 Check oil level.
ATTENTION
Risk of damage! In case of lacteous oil inform
Kärcher customer service immediately
Monthly
 Clean sieve in the water shortage safe
guard.
 Clean filter at the detergent suck hose.
Every 500 operating hours, at least
annually
 Oil change.
 Have the maintenance of the device
performed by the customer service.
At least every 5 years, recurring
 Perform the pressure test as per manu-
facturer's instructions.

Maintenance Works

Clean the sieve in the water connection
 Take out sieve.
 Clean sieve in water and reinstall.
Cleaning the fine filter
 Unpressurize the appliance.
 Unscrew the fine filter from the pump
head.
 Remove the fine filter and the filter insert.
 Clean the filter with clean water or com-
pressed air.
 Reinstall in reverse sequence.
34
Clean sieve in the water shortage safe
guard
 Loosen covering nut and take off hose.
 Take out sieve.
Note: If necessary turn in screw M8 appr.
5 mm inwards and therewith pull out sieve.
 Clean sieve in water.
 Push sieve inwards.
 Put on hose.
 Tighten covering nut firmly.
Clean filter at the detergent suck hose
 Take out detergent suck supports.
 Clean filter in water and reinstall.
Oil change
 Ready a catch bin for appr 1 Litre oil.
 Loosen release screw.
Dispose of old oil ecologically or turn in at
a gathering point.
 Tighten release screw.
 Fill oil slowly up to the MAX marking.
Note: Air pockets must be able to leak out.
For oil type refer to technical specifica-
tions.

Troubleshooting

DANGER
Risk of injury by inadvertent start-up of ap-
pliance and electric shock. Prior to all work
on the appliance, switch off the appliance
and pull the power plug.

Indicator lamp pump

1x blinking
– Lack of oil
 Replenish oil.
2x blinking
– Leak in the high pressure system
 Check high pressure system and con-
nections for tightness.
3x blinking
– Water shortage
 Check water supply, check connections.
4x blinking
– Obstructed reed switch in the water
shortage safe guard.
 Check water shortage safe guard.
EN – 10