SiBE05-722_B
Check
Service Diagnosis
112
5.11 Rotation Pulse Check on the Outdoor Unit PCB
Check No.15
RK(X)S25/35E2V1B, RK(X)S25/35G2V1B
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 1 turn by hand.
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.
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.
1
2
3
4
5
6
7
Actual rotation pulse output (0 ~ 15VDC)
Rotation command pulse input (0 ~ 15VDC)
15 VDC
320 VDC
(R10811)
S70
PCB
