LG V-C7070CT Service Manual ▷ View online
6
TROUBLE SHOOTING
1. SWITCH ON BUT MOTOR DOES NOT TURN
2. SWITCH ON, MOTOR DOES NOT TURN BUT BUZZES
CHECKING
CHECK THE POWER
SOURCE
SOURCE
The fuse is melt down in the
coverknife switch.
coverknife switch.
Exchange the fuse.
Poor plug insertion
Insert again.
Power cord cut
Repair or exchange.
Interior lead wire cut
Exchange the lead wire.
Motor(stator, armature) coil
cut or damaged.
cut or damaged.
Exchange the motor.
Poor contact carbon brush
defaced.
defaced.
Exchange or repair the motor.
Poor switch contact point
Exchange the switch.
Motor armature cut.
Exchange the motor.
Ball bearing defacement
Exchange the motor.
Impeller hindrance
(Caused by foreign matters)
(Caused by foreign matters)
Remove the foreign matters.
CAUSE
SOLUTION
7
3. SWITCH OFF BUT MOTOR TURNS
4. WEAK SUCTION POWER
Carbon brush defaced
Exchange the carbon brush
or the motor.
or the motor.
Motor armature cut
Exchange the motor.
Foreign matters attached to
the impeller
the impeller
Remove the foreign matters.
Low voltage
Inquire to the power utility
company.
company.
Hose and extension wands
are clogged with foreign
matters.
are clogged with foreign
matters.
Remove the foreign matters
in the hose or extension
wands.
in the hose or extension
wands.
The slide knob on the handle is
opened or the control knob is
located on weak position.
opened or the control knob is
located on weak position.
Close the slide knob by sliding it.
Regulate the knob.
Regulate the knob.
The motor filter is clogged.
Clean the motor filter.
The exhaust filter is clogged.
Exchange the exhaust filter.
Poor connection
Repair.
Poor switch
Low rotation speed
Motor turns normally,
but suction power is weak.
but suction power is weak.
Exchange the switch.
8
5. VIBRATION NOISES
6. RADIO, TV RECEPTION DISTURBANCE
7. IMPROPER TUBE OR NOZZLE CONNECTION
Loose parts
Secure firmly.
Unbalanced motor assembly
Exchange or repair the motor.
Foreign matters are attached
to the impeller.
to the impeller.
Remove the foreign matters.
Poor carbon brush rectification
Exchange the motor.
Poor cord, lead wire
Exchange cord, lead wire.
Poor rectification of
carbon brush
carbon brush
Exchange the motor.
Poor electric connector or
receiver
receiver
Repair the electric connector
or receiver.
or receiver.
Poor capacitor
Exchange the capacitor.
Bent connection parts
Exchange the parts.
Poor connection
(Caused by foreign matters)
(Caused by foreign matters)
Remove the foreign matters
and reconnect.
and reconnect.
Armature is cut or foreign
matters attached.
matters attached.
Exchange the motor
Remove foreign matters.
Remove foreign matters.
8
5. VIBRATION NOISES
6. RADIO, TV RECEPTION DISTURBANCE
7. IMPROPER TUBE OR NOZZLE CONNECTION
Loose parts
Secure firmly.
Unbalanced motor assembly
Exchange or repair the motor.
Foreign matters are attached
to the impeller.
to the impeller.
Remove the foreign matters.
Poor carbon brush rectification
Exchange the motor.
Poor cord, lead wire
Exchange cord, lead wire.
Poor rectification of
carbon brush
carbon brush
Exchange the motor.
Poor electric connector or
receiver
receiver
Repair the electric connector
or receiver.
or receiver.
Poor capacitor
Exchange the capacitor.
Bent connection parts
Exchange the parts.
Poor connection
(Caused by foreign matters)
(Caused by foreign matters)
Remove the foreign matters
and reconnect.
and reconnect.
Armature is cut or foreign
matters attached.
matters attached.
Exchange the motor
Remove foreign matters.
Remove foreign matters.
