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Check SiBE05-722EE

108 Service Diagnosis

5.8 Rotation Pulse Check on the Outdoor Unit PCB

Check No.16 RK(X)S25/35E2V1B, RK(X)S25/35G2V1B, RXS25/35L3V1B

Make sure that the voltage of 320 ± 30 V is applied.

1. Set operation off and power off. Disconnect the connector S70 or S71.

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 or S71.

6. Check whether 4 rotation pulses (0 ~ 15 VDC) are input 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 (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).

RK(X)S25/35G2V1B9, RXS25/35J2V1B, RXS25K3V1B, RXS35K2V1B, RXS25/35L2V1B

1. Check that the voltage between the pins 10 - 11 is 15 VDC.

2. Check if the Hall IC generates the rotation pulse (0 ~ 15 VDC) 4 times between the pins 10 -

12, 10 - 13, when the fan motor is manually rotated once.

320 VDC

(R20507)

S70 or S71

PCB

Actual rotation pulse input (0 ~ 15 VDC)

Rotation command voltage (0 ~ 6.5 VDC)

Control voltage 15 VDC

S70

Phase U

Control voltage 15 VDC

Phase V

Phase W

HU (Hall IC)

HV (Hall IC)

Free pin

(R19663)

Daikin RXS25K3V1B User Manual

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