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Always remove the plug before working on the machine!
Malfunction
W ater supply
Water tank runs over.
Water tank does not fill completely.
Pump does not suck.
Test: check water and chemical
system for tightness.
High-pressure pump
Pump makes lots of noise.
Operating pressure is not reached.
Water drops from the pump.
Oil drops from the transmission.
Pressure is too low
24
Troubleshooting
IMPORTANT!!!
Cause of malfunction / Trouble shooting
Float valve is dirty.
Float valve is defect.
Float valve is defect
Water filter soiled.
Check water inlet quantity.
Valves stick or are dirty.
Suction hose leaks.
Chemistry valve is open or leaks.
Check hose clips (connections).
High-pressure nozzle is clogged.
Connect water in let directly to the pump (2-4
bar pre-pressure).
Disconn ect suction lines below the pump.
Pump sucks air. C heck suction connections.
Check high-pressure nozzle.
Check valves.
Check O-rings under valves.
Check sleeve s.
Manometer is defect.
Unloader: check stainless steel seat and ball.
Replace sleeves in the pump.
Replace O-rings.
Check oil sea ls (replace).
Check plunger and plunger guides.
Check water supply, since wa ter deficiency or
air suction can cause damage to seals and O-
rings (chemistry va lve leaks?).
Worn high pressure nozzle
Stainless steel seat, ball, O-ring in unloader is
dirty o r defect.
Manometer is defect
Ch eck seals on the control piston.
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