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3 Troubleshooting Guide
CONDITION
When dust is vacuumed off, the
dust sensor indicator lamp doesn't
light up.
Or, it lights up when dust is not
vacuumed off.
With the swivel cap unit set to
"AUTO", the dust suction power is
not affected
Motor fails to rotate
Motor runs but there is no suction
Noise or vibration
Motor does not change power
(runs always at full speed)
Motor runs irregularly
CHECKPOINT
Air inlet
Power supply cord
Fuse of P.C.B. Ass'y
(250V, 10A)
Motor continuity
ON/OFF Switch
Triac (Inside of P.C.B.)
P.C.B AU
Hose or Suction inlet
Dust bag / Secondary filter
Motor fan
Power control
(Control)
P.C.B AU
P.C.B AU
METHOD OF INSPECTION
Check whether or not dust or for-
eign substances adhere to the dust
sensor of the air inlet.
Check power supply cord continu-
ity.
Check fuse continuity.
Check the conduction between the
terminals of the motor.
Check continuity across switch
connections
Check if there is any problem in the
triac.
(Please refer to how to check the
triac.)
Check the internal parts for any-
thing unusual. (burn-out, melt-
down, etc.)
Check if there is any blockage in
the hose or suction inlet.
Check if dust bag is full or Second-
ary filter is choked up.
Check dust accumulated in motor
fan (it could happen if the vacuum
cleaner has been used without cen-
tral filter).
Adjust the power control and check
whether or not the resistance var-
ies. (Black←→Red)
Examine the triac in the P.C.B AU
and check whether or not T1 and
T2 are short-circuited.
Check possible bad contact of
P.C.B AU.
5
CAUSE / REMEDY
Wipe the dust sensor with a dry
soft cloth.
If there is no improvement in symp-
toms, then replace the P.C.B AU.
If there is no continuity, replace the
cord reel patition unit.
If there is no continuity, replace
P.C.B AU.
If there is no continuity, replace the
motor.
If there is no continuity, replace
P.C.B AU.
If it has any problem, replace the
P.C.B AU.
If anything unusual is found,
replace the P.C.B AU with new one.
If there is any blockage, remove it.
If dust bag is full, replace with a
new one. If Secondary filter is
choked up, remove and clean it out
or replace.
If there is accumulated dust in the
motor fan, replace the motor and
check filter condition. (never try to
dismantle the motor fan)
If the resistance does not vary, then
replace the Control.
If they are short-circuited, then
replace the P.C.B AU.
Replace P.C.B AU.
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