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TROUBLESHOOTING:
Problem
Probable cause
Solutions
The machine
fails to start
ON/OFF switch in the “O“ position
Put the switch into the “I” position
The plug or extension lead does not work
Check the extension lead or change the plug. Check that
any fuses are intact
The motor thermal protection has intervened Leave the motor to cool down for a few minutes
The circuit breaker has tripped
Check the power supply system’s main switch and the circuit breaker
The motor-dri-
ven pump turns
but there’s no
pressure
Suction line blocked
Clean the filter
Air sucked in through the connections
Check the inlet connections and tube clamps
Lance with excessively wide or worn nozzle hole Check and replace the part
Damaged inlet and/or outlet valves
Have the machine checked by an authorised customer service centre
Poor water supply
Open the cock completely
Worn seals
Have the machine checked by an authorised customer service centre
Irregular pres-
sure variations
The motor-driven pump is also sucking in air Check the inlet connections and tube clamps
Blocked or worn inlet and/or outlet valve
Have the machine checked by an authorised customer service centre
Worn seals
Have the machine checked by an authorised customer service centre
Lance with excessively wide or worn nozzle hole Check or replace the nozzle
Pressure drop
Lance with worn nozzle
Change the nozzle
Damaged inlet and/or outlet valve
Have the machine checked by an authorised customer service centre
Worn seals
Have the machine checked by an authorised customer service centre
Inlet filter blocked
Clean the filter
Noise
Air intake
Check the inlet connections and tube clamps
Filter dirty
Clean the filter
Damaged or blocked inlet and/or outlet valves Have the machine checked by an authorised customer service centre
Water temperature too high
Lower the temperature
Worn bearings
Have the machine checked by an authorised customer service centre
The motor buz-
zes but does not
start
Network voltage below minimum prescribed voltage Make sure that the system is suitable
Extension lead too long or not thick enough Change the extension lead
The motor-driven pump is blocked or frozen Have the machine checked by an authorised customer service centre
High pressure water jet out of use for a long
period of time
Have the machine checked by an authorised customer
service centre
The motor stops
suddenly
The ventilation grilles are blocked
The motor has overheated and the protection device has
intervened. Free the grilles from any obstructions that inhibit
ventilation. Leave the motor to cool down for a few minutes
Lance blocked
The motor has overheated and the protection device has
intervened. Use the specific tool to clean the nozzle. Leave
the motor to cool down for a few minutes
Nozzle with incorrect diameter
The motor has overheated and the protection device has
intervened. Replace the nozzle. Leave the motor to cool
down for a few minutes
Leaks or infil-
trations
Seal defects in the high pressure system or
in the pump hydraulic circuit
Have the machine checked by an authorised customer
service centre
