Unit Does Not Reach Required Pressure - Kärcher HD 1090 Service Handbook

High pressure washer karcher hd 1090
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Troubleshooting and basic settings

Unit does not reach required pressure

Check water supply quantity
Pull out water inlet strainer
Disassemble changeover nozzle
18
12
Insufficient water supply
– The water inlet hose must be at least 3/4 inch
in diameter.
– Check the water inlet quantity (see technical
data).
Water inlet strainer blocked
– Pull out the water inlet strainer with pliers and
clean. Replace if necessary.
High-pressure nozzle insert washed out
– Disassemble the changeover nozzle. If ne-
cessary replace the nozzle inserts.
Note:
If the nozzle insert is washed out, the unit
cannot build up the full operating pressure.

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