Lavor 8.621.1004, Manual, Page: 25 / 88

25
EN
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 motor-protecting
switch is on because of in-
suffi
cient mains voltage.
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 is either
clogged or deformed.
• Either boiler coil or lance
are clogged with lime-
stone.
Repair • Either clean it or replace it.
• Descaling.
Fault To much vibrations at the
delivery
Cause • The pressure tank is run
down.
• The valve are worn out or
dirty.
Repair • Check the pressure in the
tank.
• 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
Cause • The suction and/or deliv-
ery valves are worn out.
• Presence of foreign mat-
ters in the valves, which
generate bad functioning.
• Air suction.
• The seals are worn out.
Repair • Check and/or replace.
• Check and clean the re-
place.
• Check the suction pipe.
• Check and/or replace the
seals.
Fault Pressure leakage
Cause • The nozzle is worn out.
• The suction and/or deliv-
ery valves are broken or
down.
• Presence of foreign mat-
ters in the valves, which
generate the valves bad
functioning.
• The setting valve area is
worn out.
• The seals are worn out.