Karcher K7.85M Manual - 7. Problem Checklist
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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
POSSIBLE CAUSE
CORRECTION
Machine refuses
to start
Plug not connected
Defective socket
Fuse blown
Defective extension cable
Wrong mains voltage
Connect plug
Try another socket
Change the fuse
Try without extension cable
Check mains voltage corresponds
to specifications of machine
Pump stops
Fuse blown
Overheating due to poor
water Supply
Change fuse and check size of
extension cable
Check inlet water flow rate - hose
should fill a 10 litre bucket in one
minute
Strong pressure
fluctuations
Nozzle partly blocked
Inadequate mains water
Clean dirt from nozzle hole with
needle and rinse from the front
Check inlet water flow rate
Machine does
not reach
operating
pressure
Nozzle blocked/worn out
Inadequate mains water
Inlet hose squeezed
Water filter clogged (3.1
item15)
Inlet hose blocked
Clean/replace nozzle
Check inlet water flow rate
Straighten out hose
Clean filter
Check hose for leaks or blockages
No detergent
suction
Wrong pressure
Blocked filter in
detergent tank
Set Spray Lance at the minimum
working pressure
Unblock filter
Clean ventilation hole in cover of
Detergent Tank
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.
Note: Inrush currents cause short-time voltage drops. Under unfavourable
power supply conditions other equipment may be affected. If the system impe-
dance of the power supply is < 0,15 Ohms, disturbances are unlikely to occur.