10
Washer & Pump Troubleshooting
Refer to manufacturer’s manual for full pump troubleshooting information.
Problems
Causes
Remedies
The pump does
not prime.
Suction of air.
Check the integrity of the suction circuit.
Regulation valve
positioned under
pressure.
Reset the pressure by means of the knob
(item 6, figure 1)
The pump fails
to reach max
pressure.
Pressure adjustment
knob (item 6, figure 1)
not tightened enough.
Turn the knob clockwise until required
pressure is achieved.
Not enough water supply
or priming too deep.
Make sure the water supply flow rate or
priming depth is in compliance with the
indications in the Model Information (page 2)
Suction circuit
blockages.
Check the suction circuit (especially make
sure the suction filter is clean).
Irregular
pressure
and flow rate
(pulsating).
Air suction.
Check the integrity of the suction circuit.
Suction filter dirty.
Clean the filter.
Not enough water supply
or priming too deep.
Make sure the water supply flow rate or
priming depth is in compliance with the
indications in the Model Information (page 2)
The motor pump has not
completed priming.
Prime the pump according to the indications
of the “Pump Operation” paragraph.
Too much noise. Suction circuit
blockages.
Check the suction circuit (especially make
sure the suction filter is clean).
Water supply
temperature too high.
Keep to the temperatures indicated in the
Model Information (page 2)
Too much oil
used and/or
whitish coloured
oil (water in oil).
Breakage of one or more
diaphragms.
Seek advice from a skilled technician
Failure to
produce
pressure, failure
to produce flow
or Fluctuating
pressure
No nozzle fitted in lance
assembly outlet
Fit desired nozzle
Pressure regulator valve
backed off
Wind adjuster knob in to pre-set maximum
Blocked / worn nozzle
Clean / replace nozzle
Leaks in delivery line
Tighten connections / replace damaged
accessories
Blockage in delivery line Check / clear delivery outlet & hose
