Panasonic CS-S18TKV Service Manual

112
15.4.16 H97 (Outdoor Fan Motor – DC Motor Mechanism Locked) (For CU-S24TKV)
Malfunction Decision Conditions
 The rotation speed detected by the Hall IC during fan motor operation is used to determine abnormal fan motor.
Malfunction Caused
 Operation stops due to short circuit inside the fan motor winding.
 Operation stops due to breaking of wire inside the fan motor.
 Operation stops due to breaking of fan motor lead wires.
 Operation stops due to Hall IC malfunction.
 Operation error due to faulty outdoor unit PCB.
Troubleshooting
YES
NO
When abnormality indication starts again
Turn power supply on and operate fan.
Replace fan motor.Does fan rotate smoothly?
Turn off power supply and rotate fan by
hand.
Does it rotate?
YES
NO
YES
Turn off power supply and
disconnect fan motor CN-MRT2
connector.
Check resistance of the motor.
Measure at fan motor connector
CN-MRT1 (1-2, 1-3, 2-3).
Replace outdoor PCB.
NO
Replace fan motor.
YES
NO
U
W
V
Replace fan motor.
Replace fan motor.
NO
Replace outdoor PCB.
Stop the fan motor
YES
Is the resistance normal?
Check the rotation feedback output from
fan motor’s CN-MTR1 output.
Rotate the fan motor manually (by hand)
while measure the voltage at PCB’s
CN-MRT1
- Between 1 (+) and 5 (-)
- Between 2 (+) and 5 (-)
- Between 3 (+) and 5 (-)
Use an inverter check to check on
the power transistor on board.
Connect it to PCB’s CN-MRT2 port.
Turn power ON and run the unit.
Do all 6 LED light turn ON and turn
OFF periodically?
Does the voltage at each terminal
becomes 5 and 0Vdc repeatedly?
For safety reason and to prevent
component breakdown, always switch
off the power before remove and
connect the component.
Caution
1
5
3
1
3
CN-MTR2
(WHT)
FAN
MOTOR
W
IC19
V
U
10
14
16
MS
3
~
CN-MTR1
(RED)
G5
5V
C414
C401
R403
G6

Panasonic CS-S18TKV Specifications

General

Brand	Panasonic
Model	CS-S18TKV
Category	Air Conditioner
Language	English