16 Troubleshooting
Fault
The suction power is too
low.
The air flow rate is less
than 20 m/s. The air
velocity monitoring LED in
the suction hose lights up
and a succession of short
beeps is heard.
0458-660-9621-A
Cause
The suction power is set too low.
The filter bag or the container is full.
The filter is dirty.
The suction hose, the hand tube or the
accessory is blocked up.
The seal between the top part and the container
is dirty or damaged.
The diameter of the suction hose is not set
correctly.
The filter bag or the container is full.
The filter is dirty.
The suction hose, the hand tube or the
accessory is blocked up.
The seal between the top part and the container
is dirty or damaged.
Remedy
► Set the suction power.
► Replace filter bag or empty the container.
► Switch on automatic filter cleaning.
► Clean or replace the filter.
► Clean the suction hose, hand tube or
accessory.
► Clean seal between top part and container or
ask a STIHL authorized dealer to replace it.
► Set the diameter of the suction hose.
► Replace filter bag or empty the container.
► Clean or replace the filter.
► Clean the suction hose, hand tube or
accessory.
► Clean seal between top part and container or
ask a STIHL authorized dealer to replace it.
English
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