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Troubleshooting
Malfunction
Water 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 loud noises.
Operating pressure is not reached.
Water drops from the pump.
Oil drops from the transmission.
Pressure is too low.
Machine does not switch off
Test: Bridge pressure switch (red)
Appliance does not start or
stopps during operation
Cause of malfunction / remedy
Float valve is dirty or defect.
Float valve is defect. Water filter is dirty. Insufficient
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 (2-8 bar
pre-pressure). Disconnect suction lines below the
pump
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 plun-
ger guides. Check water supply, since water defici-
ency 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.
Check return body and O-ring in unloader of the
valve housing.
Check pressure switch (red). Check micro switch.
Check cable connections. Board is defect.
Check electricity supply. Check main switch.
Check cable connections. Check board.
Check pressure switch. Switch off by overcurrent
release.
24


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