Hall Ic Check - Daikin FTXS09HVJU Service Manual

Check
5.1.13 Rotating Pulse Input on the Outdoor Unit PCB Check
 Outdoor fan motor
Check No.15
Make sure that the voltage of 320 ± 30 V is applied.
1. Set operation OFF and power OFF. Remove 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 5 VDC.
5. Keep operation OFF and power OFF. Connect the connector S70.
6. Check whether 2 pulses (0 - 15 V) are output at the pins 1-4 when the fan motor is rotated 1 turn

5.1.14 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.
If NG in step 1  faulty PCB  Replace the PCB.
If NG in step 2  faulty Hall IC  Replace the fan motor.
If OK in both steps 1 and 2  Replace the PCB.
Service Diagnosis
by hand.
When the fuse is melted, check the outdoor fan motor for proper function.
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.
 Replace the PCB.
Actual rotating pulse output (0-15V)
Rotation command pulse input (0-15V)
15V
DC320V
SiUS04-904
(R10811)
151