Hall Ic Check - Daikin G-Series Service Manual

SiBE12-933_A
5.1.12 Rotating Pulse Input on the Outdoor Unit PCB Check
Check No.15 <Outdoor fan motor>
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
When the fuse is melted, check the outdoor fan motor for proper function.

5.1.13 Hall IC Check

Check No.16 1. Check the connector connection.
2. With the power ON, operation OFF, and the connector connected, check the following.
Failure of (1)
Failure of (2)
OK in both (1) and (2)
Service Diagnosis
rotated 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 PCB.
PCB
S70
1
2
3
4
5
6
7
∗
Output voltage of about 5 V between pins 1 and 3.
∗
Generation of 3 pulses between pins 2 and 3 when the fan motor is operating.
faulty PCB
faulty Hall IC
Replace the PCB.
1
2
3
→
Replace the PCB.
Actual rotating pulse output (0 ~ 15 VDC)
Rotation command pulse input (0 ~ 15 VDC)
15 VDC
320 VDC
Replace the PCB.
Replace the fan motor.
Gray (power supply)
Purple (signals)
Blue (grounding)
Check
(R10811)
221