IMPORTANT!!!
Always remove the plug before working on the machine!
Troubleshooting
24
Malfunction Cause of malfunction / Trouble shooting
Water supply
Water tank runs over.
Water tank does not fill completely.
Pump does not suck.
Test: check water and chemical
system for tightness.
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 inlet directly to the pump (2-4
bar pre-pressure).
Disconnect suction lines below the pump.
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
Pump sucks air. Check suction connections.
Check high-pressure nozzle.
Check valves.
Check O-rings under valves.
Check sleeves.
Manometer is defect.
Unloader: check stainless steel seat and ball.
Check seals on the control piston.
Replace sleeves in the pump.
Replace O-rings.
Check oil seals (replace).
Check plunger and plunger guides.
Check water supply, since water deficiency or
air suction can cause damage to seals and O-
rings (chemistry valve leaks?).
Worn high pressure nozzle
Stainless steel seat, ball, O-ring in unloader is
dirty or defect.
Manometer is defect
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