Trouble Possible cause What to do about it
Pump fails to reach
prescribed pressure
Leakage in the water pressure
suction hose and connecting
pieces
Check and retighten screw
connections, replace sealings if
necessary. Tighten hose clips
Pump seals leaking Have an expert check pump
seals and plungers for wear con-
ditions and replace, if necessary
Lack of water, unsufcient water
supply
Provide sufcient water supply
Dirty water lter Clean lter, provide clean water
supply
Using wrong spray nozzle Screw in correct spray nozzle
Excessive pump
pressure
Spray nozzle blocked Remove and clean nozzle ush
spray lance without spray gun
Using wrong spray nozzle Mount correct spray nozzle
No ow of cleaning
agents
Filter on cleaning agent suction
hose blocked
Clean lter
Cleaning agent tank empty or
lter basket on suction hose is
not below liquid level
Rell cleaning agents, lower lter
basket
Injector contaminated Have an expert clean injector
M-variant
Abrupt pressure
impulses
MP-variant
With the spray gun
closed, the ma-
chine permanently
switches on and off
Leakage in pressure system Check pipes, ttings, pump
connections and spray gun for
leakage, seal leaky, parts or have
them replaced by an expert
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