Poor connection
Poor switch
Carbon brush defaced
Motor armature cut
Foreign matters attached to
the impeller
Low voltage
Hose and extension wands are
clogged with foreign matters
Filter bag or cloth bag is filled
with inhaled foreign matters
Repair
Exchange the switch
Exchange the carbon brush
or the motor
Exchange the motor
Remove the foreign matters
Inquire to the power utility
company
Remove the foreign matters
in the hose or extension wands
Low rotation speed
Motor turns normally,
but suction power is weak
Rotating switch is on low
mode
Rotate it with clock-wise so
power is increasd
Remove the foreign matters
or exchange the filter bag or
clean the cloth bag
3. SWITCH OFF BUT MOTOR RUNS.
4. WEAK SUCTION POWER
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