Hilti VC 20-U-Y Original Bedienungsanleitung Seite 45

9.1 Battery and mains-powered operation
Fault
The warning tone is activ-
ated (reduced suction per-
formance; VC 20‑UM‑Y/
VC 40‑UM‑Y).
Dust is blown out of the
appliance.
The appliance doesn't
start or switches itself off
after a short time.
No battery is detected, i.e.
no LED lights or blinks.
9.2 Mains-powered operation
Fault
The motor doesn't restart.
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 and hose
diameter setting don't corres-
pond.
Dust on the sealing surfaces
between the container and top
section of the appliance.
The filter element is not fitted
correctly.
The filter element is damaged.
The filter seal is damaged.
The container level monitoring
system has been triggered.
The battery was inserted and
removed too quickly.
Possible cause
The mains circuit breaker has
been tripped.
Remedy
Change the dust bag.
See section: 7.5.3 Changing
the plastic dust bag 4
See section: 7.5.2 Changing
the paper dust bag 2
Switch the automatic filter
cleaning system on then per-
form the "power cleaning" pro-
cedure: Disconnect the suction
hose, cover the suction open-
ing with your hand and keep
it covered until three cleaning
cycles have been completed.
Change the filter element if ne-
cessary.
See section: 8.1 Changing the
filter element
Clean the hose and dust hood.
Set the switch to the correct
hose diameter setting.
See section: 7.3 Hose
diameter setting
(VC 20‑UM‑Y/ VC 40‑UM‑Y)
Clean the sealing surfaces.
Remove the filter element and
refit it correctly.
Fit a new filter element.
Fit a new filter element.
Clean the container level mon-
itoring sensors and surround-
ing area with a brush.
Pull the battery out, wait ap-
prox. 2 seconds, and then re-
insert it.
Remedy
Reset the circuit breaker. Find
the reason for the overload
current if it trips again.
en
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