IST M40 - Page 26

26
Troubleshooting
TrOubleshOOTinG
PROBLEM POSSIBLE CAUSE CORRECTIVE ACTION
Decrease in suction
strength (cont.)
Obstruction in the
piping system
Remove the screw from
the air intake connector,
to free the central
vacuum unit from the
piping system (see gure
3 on page 8). Start the
unit by plugging the
hose into a vacuum
inlet. By placing your
extended hand over
the air intake opening
on the unit, check the
suction strength on the
unit itself. If suction
strength is normal, the
obstruction is in the
piping system. If suction
strength is diminished
or completely absent,
have the unit checked
by an authorized service
center.
If none of these suggestions restore suction strength,
contact your authorized service center.