Hilti VC 40 Mode D'emploi page 32

9 Troubleshooting
Fault
The audible warning signal
is emitted (reduced suction
power) (VC 20‑UM/ VC 40‑UM).
en
Dust is blown out of the appli-
ance.
The appliance switches itself off
or on inadvertently or the user
receives electric shocks (static
discharge).
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".
The automatic filter element
cleaning system doesn't work.
10 Disposal
Most of the materials from which Hilti power tools or appliances are manufactured can be recycled. The materials
must be correctly separated before they can be recycled. In many countries, Hilti has already made arrangements for
taking back your old power tools or appliances for recycling. Ask Hilti customer service or your Hilti representative for
further information.
28
All manuals and user guides at all-guides.com
Possible cause
The dust bag is full.
The filter element is clogged with dirt
or dust.
Blockage in the hose, vacuum cleaner
or power tool dust hood.
The hose diameter setting is incor-
rect.
The filter element is not fitted cor-
rectly.
The filter element is damaged.
The filter seal is damaged.
Electrostatic charge is not dissipated
correctly; the appliance is connected
to an unearthed/ungrounded power
outlet.
The water level cut-out is activated.
The mains circuit breaker has been
tripped.
The container is full.
The motor overheating protection cut-
out has been activated.
The motor overheating protection cut-
out switches the motor off repeatedly
as the ventilation slots are clogged.
The electric tool is faulty or is not
plugged in fully.
No suction hose is connected.
Remedy
Change the dust bag.
See section: 7.4.2 Changing the
plastic dust bag 4
See section: 7.4.1 Changing the pa-
per dust bag / filter fleece
Change the filter element if neces-
sary.
See section: 8.2 Changing the filter
element
Clean the hose and dust hood.
See section: 7.1 Hose diameter set-
ting (VC 20‑UM/ VC 40‑UM)
Remove the filter element and refit it
correctly.
Fit a new filter element.
Fit a new filter element.
Connect the appliance to an
earthed/grounded power outlet; use
an antistatic hose.
Clean the probe and the area around
the probe with a brush.
Reset the circuit breaker. Find the
reason for the overload current if it
trips again.
Switch the appliance off. Empty the
container.
See section: 7.8.2 Emptying the
waste material container when no
dust bag is fitted (collecting liquids)
Switch off the appliance and allow
it to cool for 5 min. If the motor still
doesn't start, contact Hilti Service.
Clean the ventilation slots carefully
with a dry brush.
Check the electric tool for correct op-
eration and plug it in fully.
Connect the suction hose.