SiMX042215E
Check
Part 6 Service Diagnosis
95
5.7 Outdoor Fan Motor Check
Check No.16
12/18 class
Check if the sinusoidal voltage is generated between pins 1 - 3 and 3 - 5 when the fan motor is
manually rotated once.
R6000709
24 class
Make sure that the voltage of 320 ± 30 V is applied.
When the fuse is melted, check the outdoor fan motor for proper function.
If NG in step 2
Defective PCB
Replace the outdoor unit PCB (main PCB).
If NG in step 4
Defective Hall IC
Replace the outdoor fan motor.
If OK in both steps 2 and 4
Replace the outdoor unit PCB (main PCB).
1. Set operation OFF and power OFF. Disconnect the connector S70.
2. Check that the voltage between the pins 4 - 7 is 320 VDC.
3. Check that the control voltage between the pins 4 - 3 is 15 VDC.
4. Check that the rotation command voltage between the pins 4 - 2 is 0 ~ 6.5 VDC.
5. Keep operation OFF and power OFF. Connect the connector S70.
6. Check whether 4 rotation pulses (0 ~ 15 VDC) are input at the pins 4 - 1 when the fan
motor is rotated 1 turn by hand.
5
3
1
Phase
W
Phase V
Phase U
S71
PCB
1
2
3
4
5
6
7
320 VDC
(R252
88
)
S70
PCB
Act
u
al rotation p
u
lse inp
u
t (0
~
15 VDC)
Rotation command
v
oltage (0
~
6.5 VDC)
Control
v
oltage 15 VDC
