KDK 2509UA Installation And Operating Instructions Manual page 12

Trouble shooting
Check according to the following table and take measures.If the product
still does not work normally, disconnect the power and contact After-Sale
Service Center or the dealer.
Condition
Can't operate.
With large noise
or significant
vibration.
Poor separation
performance.
Can't operate.
Poor separation
performance.
With large noise
or significant
vibration.
12
1st Possible reason
Check the voltage.
Installed not properly.
P6～P7 ）
（
Not suitable model.
Wiring is not fixed.
Air inlet grille is
blocked.
Dust piles up in
impeller.
2nd Possible reason
Wiring is not correct.
P7）
（
Guide vane is not in
proper position.
P9）
（
Double pole switch
became off.
Any other substances
fell into the product.
3rd Possible reason
Product is installed
vertically.
Motor runs abnormally.