Daikin RZQ Series FCQ20EVA Service Manual page 171

SiME281501E
CHECK 11
Fan Speed Pulse
(1) Set operation OFF and power OFF. Disconnect the connector (1).
(2) Check that the voltage between the pins 3 - 4 is about 15 VDC.
(3) Check that the voltage between the pins 1 - 4 is about 5 VDC.
(4) Keep operation OFF and power OFF. Connect the connector (1).
(5) Check whether 2 pulses (0 and 5 VDC) are output 4 times at the pins 1 - 4 when the fan motor is rotated 1
turn by hand.
Check
If NG in steps 2 and 3
If NG in step 5
If OK in steps 2, 3 and 5
Note:
1. Connector and outdoor unit PCB
Model
RZQ20/24
RZQ36-48
Service Diagnosis
Measure
Defective PCB
Replace the outdoor unit PCB.
Defective Hall IC
Replace the outdoor unit fan motor.
Replace the outdoor unit PCB.
PCB
(∗1)
1
2
3
4
5
6
7
Connector for fan motor (1)
X106A
X106A (Upper fan)
X107A (Lower fan)
Troubleshooting by Remote Controller
Rotation command pulse input (0 and 5 VDC)
0 VDC
15 VDC
250~320 VDC
162