Pkm S25-90 ABTH Bedienungsanleitung Seite 38

 motor defective
 one-way valve is leaky
 connection base chimney-telescopic
chimney is leaky
 motor not properly fixed
 hood not properly fixed
 too much distance hood-hob
 too much draught because of open
doors and/or windows
 mounting rail is not firmly fixed
 screws are not firmly tightened
If the hood does not work properly and/or you can hear increased operating noise,
 Incorrect dimension of the air duct.
 Obstruction in the air duct.
 The diameter of the air duct from hood to wall-box inclusive should be 120
mm; otherwise the capacity of the motor may be decreased.
 If you have installed a fly screen on the wall-box, the air vent may be
obstructed. Check by removing the fly screen.
 If the cover panel of the wall box is equipped with firm and slanted slats, the air
vent may be obstructed. Check by removing the cover panel.
 Install a cover panel with moveable slats, which do not obstruct the air vent.
 Check condition and cleanliness of the filters.
 Check if the air which is extracted by the hood is replaced to avoid negative
pressure.
 When you run your appliance in recirculating mode, check if the carbon filter
has been replaced on time (min. every 3-6 months).
If the appliance has a malfunction not noted on the schedule or if you have
checked all items on the schedule but the problem still exists, please contact the
aftersales servivce.
Abnormal motor-smells.
Smear of oil.
Appliance vibrates.
Insufficient extracting capacity.
Appliance is unstable.
check the schedule below:
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 replace motor
 seal the valve
 seal the connection with a suitable
material
 fix motor properly
 fix hood properly
 lower position of hood
 close the doors/windows
 fix mounting rail properly
 tighten the screws