10
POSSIBLE PROBLEM AND SOLUTION
FAULT
PROBABLE CAUSE
REPAIR
When switched on the machine
will not start working.
• Plug is not well connected or
electric socket is faulty.
• The main voltage is
insufficient, lower than
minimum requirement.
• The pump is stuck.
• Thermal safety switch has
tripped.
• Check plug, socket.
• Check that the main voltage
is adequate.
• Refer to after storage
instructions.
• Switch off the unit and let the
motor cool for a few minutes.
• Leave the lance open.
Fluctuating Pressure.
• Pump sucking air.
• Valves dirty, worn out or
stuck.
• Pump seals worn out.
• Check that hoses and
connections are airtight.
• 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
activated due to the motor
overheating.
• Check that the main voltage
corresponds to specifications.
• Switch off the unit and let it
cool for a few minutes.
The pump doesn’t reach the
necessary pressure.
• Water inlet filter is clogged.
• Pump sucking air from
connections or hoses.
• Suction/ delivery valves are
clogged or worn.
• Unloaded valve is stuck.
• Lance nozzle incorrect or
worn.
• Clean the water inlet filter.
• Check that all supply
connections are tight.
• Check that the water feeding
hose is not leaking.
• Clear or replace valves.
• Loosen and re-tighten
regulation screw.
• Check and/or replace.
