Manual Karcher HDS 7-9-4 M (page 24 of 372) (All languages)

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Note: If the indicator lamps for pump, rotation direction,

burner malfunction or engine are on during operation,

turn off the appliance immediately and repair malfunc-

tion, refer to "Help with malfunctions".

 Release the trigger gun. To do so, push the safety

catch towards the back.

When activating the hand spray gun the device switch-

es back on.

Note: If no water comes out of the high pressure nozzle,

vent pump. Refer to "Help with malfunctions - appliance

is not building up pressure".

 Set temperature regulator to desired temperature.

30 °C to 98 °C

– Clean with hot water.

100 °C to 150 °C

– Clean using steam.



 In steam operation (> 100°C), use the steam noz-

zle available as an accessory (see “Steam opera-

tion”).

 Turn the regulation spindle in a clockwise direction:

Increase working pressure (MAX).

 Turn the regulation spindle in an anti-clockwise di-

rection: Reduce working pressure (MIN).

 Set thermostat to max. 98 °C.

 Set the working pressure/quantity regulation at the

pump unit to maximum quantity.

 Set the working pressure and feed quantity by turn-

ing (steplessly) the pressure/quantity regulation

mechanism at the hand spray gun (+/-).

 DANGER

Risk of injury! When adjusting the pressure/quantity

regulation, make sure that the screw connection of the

spray lance does not become loose.

Note: For long term work with low pressure, set pressure

at the pressure/quantity regulation of the pump unit.

– For considerate treatment of the environment use

detergent economically.

– The detergent must be suitable for the surface to

be cleaned.

 With support of the detergent dose valve set deter-

gent concentration as determined by the manufac-

turer.

Note: Recommended values at the control panel at

maximum working pressure.

 Set pressure/temperature and detergent concen-

tration according to the surface to be cleaned.

Note: To prevent damage due to too much pressure, al-

ways position high pressure ray first from a greater dis-

tance towards object to be cleaned.

– Loosen the dirt:

 Spray detergent economically and let it work for

1...5 minutes but do not let it dry up.

– Remove the dirt:

 Spray off loosened dirt with the high pressure jet.

Removal of light contaminations and clear rinse, i.e.:

Gardening tools, terrace, tools, etc.

 Set operating pressure according to need.

The appliance works in the most economical tempera-

ture range.

Note: The temperature can be regulated up to 60 °C.

We recommend the following cleaning temperatures:

– Light contaminations

30-50 °C

– Contaminations containing protein, i.e. in the food

processing industry

max. 60 °C

– Vehicle cleaning, machine cleaning

60-90 °C

– De-preserve, contaminations containing strong fat

contents

100-110 °C

– De-frosting of surcharge substances, partially fa-

cade cleaning

up to 140 °C

 DANGER

Scalding danger!

 Set temperature regulator to desired temperature.

 DANGER

Scalding danger! The work pressure must not exceed

3.2 MPa (32 bar) when operating with temperatures

above 98 °C.

Therefore the following measures must definitely be

performed:



 In steam operation (> 100°C), use the steam

nozzle available as an accessory (for part no.,

see technical data).

 Open up the pressure/ quantity regulator on the

hand spray gun completely, direction + until stop.

 Set the working pressure/quantity regulation at the

pump unit to the minimum quantity.

 Set temperature regulator to min. 100 °C.

 Secure the trigger gun. To do so, push the safety

catch towards the front.

 Set dosing value for detergent to "0".

 Set the appliance switch to "1" (operation with cold

water).

 Open the hand spray gun and rinse the appliance

for at least 1 minute.

 DANGER

Danger of scalding from hot water! After the operation

with hot water or steam, the device must be operated

with opened gun with cold water for at least two min-

utes.

 Shut off water supply.

 Open the hand spray gun.

Adjust cleaning temperature

Set working pressure and flow rate

Pressure/quantity regulation of the pump unit

Pressure/ quantity regulation at the hand spray gun

Operation with detergent

Cleaning

Recommended cleaning method

Operating with cold water

Eco operation

Operating with hot water/steam

Operating with hot water

Operating with steam

Interrupting operation

After operation with detergent

Turn off the appliance

24 EN

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Karcher HDS 7-9-4 M Manual

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