LAVOR Pro HHPV Bedienungsanleitung Seite 26

> TROUBLESHOOTING
Before doing any work on the machine, discon-
nect the electricity and water supplies and dis-
charge the pressure. Proceed systematically to
identify faults following the chart below; if you
are still unable to eliminate the problem, call in
the Authorized After-Sales Service.
Fault When the main switch is
turned on the machine
does not start
Cause • Plug not properly connect-
ed.
• Connection panel fuses
are burnt out.
Repair • Carefully check the plug
and the electric cable.
• Check them and replace
them.
Fault The motor hums but does
not start
Cause • A phase is missing (in
three phase models).
• Lows voltage.
• High pressure pump is
blocked.
Repair • Contact an authorised
service centre.
• Contact an authorised
service centre.
• Contact an authorised
service centre.
Fault The motor stops suddenly
or after a while
Cause • The
switch is on because of in-
suffi cient mains voltage.
26
motor-protecting
Repair • Check the value of the
mains voltage.
• Contact an authorised
service centre.
Fault When the lance is turned
on pressure values de-
crease and increase
Cause • The nozzle
clogged or deformed.
• Either boiler coil or lance
are clogged with lime-
stone.
• Either clean it or replace it.
Repair
• Descaling.
Fault To much vibrations at the
delivery
Cause • The valve are worn out or
dirty.
Repair • Check and/or replace.
Fault The pump does not reach
the fi xed pressures
Cause • The pump sucks air.
• The valves are worn out.
• The setting valve area is
worn out.
• The nozzle is unsuitable or
worn out.
• The seals are worn out.
Repair • Check the suction pipes.
• Check and/or replace.
• Contact an authorised
service centre.
• Contact an authorised
service centre.
Fault Irregular pressure fl uctua-
tions
EN
is either