Hilti VC 20­U Manual De Instrucciones página 16

Trouble or fault
No suction power or
reduced suction power.
Dust is blown out of the
appliance.
The appliance switches
itself off or on inadver-
tently or static electricity
discharges through the
user.
The appliance doesn't
start or switches itself
off after a short time.
The motor doesn't
restart.
The motor doesn't run
when set to "AUTO".
Possible cause
The filter element is clogged
with dirt or dust.
The suction hose or dust
hood on the electric tool is
blocked.
The filter element is not fitted
correctly.
The filter element is dam-
aged.
Electrostatic charge is not
conducted away – the appli-
ance is connected to an un-
earthed/ungrounded power
outlet.
The water level cut-out is
activated.
The mains circuit breaker
has been tripped.
The waste material container
is full.
The motor overheating pro-
tection cut-out has been ac-
tivated.
The motor overheating pro-
tection cut-out switches
the motor off repeatedly
because the air vents are
clogged.
The appliance is faulty or is
not correctly plugged in.
Action to be taken
▶ If the automatic filter
cleaning system is de-
activated, activate it and
allow the vacuum cleaner
to run for 30 seconds.
▶ Change the filter element.
→ page 12
▶ Clean the suction hose
and the dust hood.
▶ Fit the filter element again
correctly.
▶ Fit a new filter element.
▶ Connect the appliance
to an earthed/grounded
power outlet and use an
antistatic suction hose.
▶ Clean the sensors and the
area around the sensors
with a brush.
▶ Reset the circuit breaker.
▶ Find the reason for the
overload current if the
circuit breaker trips again.
▶ Switch the appliance off
and empty the waste
material container.
▶ Empty the waste material
container. → page 11
▶ Switch the appliance off
and allow it to cool down
for about 5 minutes.
▶ If the motor doesn't start,
return the appliance to
Hilti Service.
▶ Clean the air vents care-
fully using a dry brush.
▶ Make sure that the
supply cord plug is fully
plugged in and check that
the appliance functions
correctly.
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