Unitor HPCE DYNAMIS 500+ - Troubleshooting

24
OPERATIONS MANUAL Rev. 1.4
Troubleshooting
PROBLEM
POSSIBLE CAUSE
CORRECTIVE ACTION
Pump motor does
not run
Incorrect power supply
Check power supply (breaker 50 A)
Missing one phase
Motor protection activated, check
reason for motor overload
Empty water tank (‘No Water’ lamp is activated in
the control panel)
Ensure sufficient feed water supply to
the tank
High pressure shock
in case of release
trigger from hand
Unloader valve did not operate
correct
Replace Unloader valve – please note
that Unloader valve settings are fixed,
and unloader valve must not be repaired
Replace seal kit
Unloader valve
switched all
the time during
handle is
closed
Leak in HP-hose, handle or in
the check valve of the unloader valve
Seal the leak by changing O-rings of
HP-handle or unloader valve
HP-pump is very
noisy Supply water temperature too high Supply water with lower temperature
Water Clogging at
the Filter
Poor feed water quality
Check and replace filter cartage and
always ensure a differential pressure of
less than 1Bar
Lower/No water jet
pressure
Suction pressure valves are dirty
Clean the valves
Gaskets are dry and brittle
Replace gaskets
Suction pipe coupling is leaking
Replace and ventilate
Clogged or worn-out high-pressure nozzle
Clean/replace high pressure nozzle