Panasonic MC-CG381-AU21, Service Manual

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5
3 Troubleshooting Guide
CONDITION CHECK POINT METHOD OF INSPECTION TRANSACTION
Motor fails to rotate
(no noise is heard at all)
Motor fails to rotate
(no noise is heard at all) Power supply cord Check power supply cord continu-
ity. If there is no continuity, replace the
cord reel patition unit.
Fuse of P.C.B. Ass’y
(125V, 15A) Check fuse continuity. If there is no continuity, replace
P.C.B. Ass’y.
Motor continuity Check the conduction between the
terminals of the motor. If there is no continuity, replace the
or motor.
ON/OFF Switch Check continuity across switch
connections If there is no continuity, replace
P.C.B. Ass’y.
Power supply cord Check power supply cord continu-
ity. If there is no continuity, replace the
cord reel patition unit.
P.C.B. Ass’y Check the internal parts for any-
thing unusual. (burn-out, melt-
down, etc.) If anything is found unusual,
replace the P.C.B. assembly with
new one.
Motor runs but there is no suction Hose or Suction inlet, Extension
wand and nozzle
Check whether or not the specified
components are clogged with for-
eign substances. If there is any blockage, remove it.
Dust bog / Secondary filter Check if dust bag is full or Second-
ary filter is choked up. If dust bag is foll, replace with a
new one. If Secondary filter is
choked up, remove and clean it out
or replace.
Noise or vibration Motor fan Check dust accumulated in motor
fan (it could happen if the vacuum
cleaner has been used without cen-
tral filter). If there is dust accumulated in the
motor fan, replace the motor and
check filter condition. (never try to
dismantle the motor fan)
The motor output cannot be
changed.
(The motor always rotates at full
speed.) P.C.B. ass’y Check whether or not T1 and T2 of
the Triac on the P.C.B. ass'y are
short-circuited. If they are short-circuited, then
replace the P.C.B. ass'y.
The motor output cannot be
switched.
• The MIN/MAX cannot be
switched.
• The switch cannot be turned on.
• The motor always rotates at the
MIN speed.
Switch and the limit switch on
the P.C.B. Ass'y Verify the conductivity of both
switches.
If any of the switches is not conduc -
tive, then replace the switch or the
P.C.B. Ass’ y (with a limit switch)
accordingly.