Kärcher 750mx Manual page 16

7. PROBLEM CHECKLIST
The machine you have chosen is of the highest quality. If you
experience a problem, please check the following chart before
contacting the Karcher Customer Helpline on 0 12 95 75 22 00
PROBLEM
Machine refuses
to start
Pump stops
Strong pressure
fluctuations
Machine does
not reach
operating
pressure
No detergent
suction
Note: Inrush currents cause short-time voltage drops. Under unfavourable power
supply conditions other equipment may be affected. If the system impedance of
the power supply is < 0,15 Ohms, disturbances are unlikely to occur.
16
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
Inadequate mains water
Nozzle blocked/worn out
Inadequate mains water
Inlet hose squeezed
Water filter clogged (3.1
item15)
Inlet hose blocked
Wrong pressure
Blocked filter in
detergent tank
CORRECTION
Connect plug
Try another socket
Change the fuse
Try without extension cable
Check mains voltage corresponds
to specifications of machine
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
Check inlet water flow rate
Clean/replace nozzle
Check inlet water flow rate
Straighten out hose
Clean filter
Check hose for leaks or blockages
Set Spray Lance at the minimum
working pressure
Unblock filter
Clean ventilation hole in cover of
Detergent Tank