9
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 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
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 out.
Unloaded valve is stuck.
Lance nozzle incorrect or worn out.
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
Summary of Contents for APW-VSA-150P
Page 9: ...8 ELECTRICAL DIAGRAM ...
