Kärcher K 090 Operating Instructions Manual page 18

7. PROBLEM CHECKLIST
The machine you have chosen is of the highest quality. Correctly stored
away from frost it should operate without problems. If a problem does
arise, please check the following chart as a solution may be at hand.
PROBLEM
Machine refuses
to start
Pump stops
Strong pressure
fluctuations
Machine does not
reach operating
pressure
No detergent
suction
In the unlikely event that you need to return your machine to your supplier,
please ensure that this is returned, complete with hose, gun and all
accessories.
18
POSSIBLE CAUSE
Plug not connected
Defective socket
Fuse blown
Defective extension cable
Wrong mains voltage
Fuse blown
Overheating due to poor
water Supply
Nozzle partly blocked
Nozzle blocked/worn out
Inadequate mains water
Inlet hose squeezed
Water filter clogged
(3.1 item 5)
Inlet hose blocked
Wrong pressure
Blocked Detergent Filter
CORRECTION
Connect plug
Try another socket
Change the fuse
Try without extension cable
Check mains voltage corresponds to
specifications of machin
Change fuse and check size of extension
cable
Check inlet water flow rate - hose should
fill a 10 litre bucket in one minute
Clean dirt from nozzle hole with needle
and rinse from the front
Clean/replace nozzle
Check inlet water flow rate
Straighten out hose
Clean filter
Check hose for leaks or blockages
Use SprayGun without Spray Lance
Unblock Filter