Outdoor Fan Motor Check - Daikin 2MXS-W Series Service Manual

SiUS122226E
8.8

Outdoor Fan Motor Check

Check No.16
2/3/4MXS, 2/3MXL(H)
Make sure that the voltage of 320 ± 30 V is applied.
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 3 - 4 is 15 VDC.
4. Check that the rotation command voltage between the pins 2 - 4 is 0 ~ 6.5 VDC.
5. Keep operation OFF and power OFF. Connect the connector S70.
6. Check whether 4 pulses (0 ~ 15 VDC) are output at the pins 1 - 4 when the fan motor is rotated
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).
5MXS, 4MXL(H)
Manually rotate the outdoor fan motor and check if 4 pulses of sinusoidal voltage are detected
between pins 1-2 and then pins 2-3.
Part 6 Service Diagnosis
1 turn by hand.
PCB
S70
1
2
3
4
5
6
7
Actual rotation pulse input (0 ~ 15 VDC)
Rotation command voltage (0 ~ 6.5 VDC)
Control voltage 15 VDC
320 VDC
S70
U (red)
3
2 V (white)
1 W (black)
Check
(R19655)
R6000524
231