Troubleshooting Guide - Panasonic MC-YL799-N147 Service Manual

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3 Troubleshooting Guide

CONDITION
Fan motor unit fails to rotate when
it is switched on
Suction is weak
Abnormal sound
CHECKPOINT
Meltdown of fuse unit
Continuity of Cord reel partition
unit
Continuity of the main switch
unit
Check of the motor connection
faston terminals
Continuity of the fan motor unit
Wearing of the carbon brush
Clogging in Curved pipe unit /
Joint pipe unit / Nozzle assy /
Hose unit
Clogging in the cloth bag unit /
Secondary filter
Indicator pipe unit
(Air protector)
Fan motor unit
METHOD OF INSPECTION
• Check fuse continuity.
(Visual and conduction check)
• Check that there is conduction
between the power plug and the
plug terminal using a tester.
• Check the state of connection of
the flag terminals to the plug ter-
minals.(Check that there is no
looseness.)
Also check for the presence/
absence of protrusion and line
breakage in the lead wires and
flag terminals.
• Check with tester between both
terminals on the switch, while
turning switch ON/OFF.
• Check if it is securely connected
by pulling on the lead wire.
• Check the continuity between
both terminals (1.Blue connec-
tion of lead wire 2.Brown con-
nection of lead wire) (lead wire
connection terminal) of the fan
motor unit.
• Visually check if one side of the
carbon brush is worn out abnor-
mally.
• Check for clogging in each part Remove dust or replace parts
• Check for clogging in each part Clean
• Is it full of dust?
Clogging
• Problem with the fan motor unit
or carbon brush
5
CAUSE / REMEDY
Replace the main switch unit (with
fuse).
*Check the fan motor unit at
same time.
There may be the possibility
of a motor problem
Replace the cord reel partition unit
If there is no continuity, replace the
main switch unit (with fuse).
Securely connect.
If there is not continuity, replace the
fan motor unit.
(Disconnection of the coil inside the
motor)
Replace the fan motor unit.
Clean
Remove dust from each parts
Replace the fan motor unit.

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Mc-yl799-n149Mc-yl799-n747

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