Frank FC 711 M Operating Instructions Manual page 39

Trouble
Pump fails to reach
prescribed pressure
Excessive pump
pressure
No flow of cleaning
agents
M-variant
Abrupt pressure
impulses
MP-variant
With the spray gun
closed, the ma-
chine permanently
switches on and off
Possible cause
Leakage in the water pressure
suction hose and connecting
pieces
Pump seals leaking
Lack of water, unsufficient water
supply
Dirty water filter
Using wrong spray nozzle
Spray nozzle blocked
Using wrong spray nozzle
Filter on cleaning agent suction
hose blocked
Cleaning agent tank empty or
filter basket on suction hose is
not below liquid level
Injector contaminated
Leakage in pressure system
What to do about it
Check and retighten screw
connections, replace sealings if
necessary. Tighten hose clips
Have an expert check pump
seals and plungers for wear con-
ditions and replace, if necessary
Provide sufficient water supply
Clean filter, provide clean water
supply
Screw in correct spray nozzle
Remove and clean nozzle flush
spray lance without spray gun
Mount correct spray nozzle
Clean filter
Refill cleaning agents, lower filter
basket
Have an expert clean injector
Check pipes, fittings, pump
connections and spray gun for
leakage, seal leaky, parts or have
them replaced by an expert
39
UK