Rotation Pulse Check On The Outdoor Unit Pcb - Daikin H Series Service Manual

SiUS04-924_A
5.8

Rotation Pulse Check on the Outdoor Unit PCB

Check No.16 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 ~ 15 VDC.
5. Keep operation off and power off. Connect the connector S70.
6. Check whether 2 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.
116
1 turn by hand.
If NG in step 2  Defective 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.
PCB
S70
1
2
3
4
5
6
7
 Replace the outdoor unit PCB.
Actual rotation pulse output (0 ~ 15VDC)
Rotation command pulse input (0 ~ 15VDC)
15 VDC
320 VDC
Check
(R10811)
Service Diagnosis