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7. TROUBLE SHOOTING
FAULT
PROBABLE CAUSE
REPAIR
When
switched on
the machine
will not start
working.
1) Plug is not well connected or
electric socket is faulty.
2) The main voltage is
insufficient, lower than
minimum requirement.
3) The pump is stuck.
4) Thermal safety switch has
tripped.
1) Check plug, socket.
2) Check that the main voltage
is adequate.
3) Refer to after storage
instructions.
4) Switch off the unit and let the
motor cool for a few minutes.
Leave the lance open.
Fluctuating
Pressure.
1) Pump sucking air.
2) Valves dirty, worn out or
stuck. Pump seals worn out.
1) Check that hoses and
connections are airtight.
2) Clean and replace, or refer to
dealer.
Water
leaking from
the pump.
Seals worn out. Check and replace, or refer to
dealer.
The motor
stops
suddenly.
Thermal safety switch has
tripped due to overheating.
Check that the main voltage
corresponds to specifications.
Switch off the unit and let it cool
for a few minutes.
The pump
does not
reach the
necessary
pressure.
1) Water inlet filter is clogged.
2) Pump sucking air from
connections or hoses.
3) Suction/ delivery valves are
clogged or worn out.
4) Unloaded valve is stuck.
5) Lance nozzle incorrect or
worn out.
1) Clean the water inlet filter.
2) Check that all supply
connections are tight
3) Check that the water feeding
hose is not leaking.
4) Clear or replace valves.
5) Loosen and re-tighten
regulation screw. Check
and/or replace
23


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