Check; Fan Motor Connector Output Check; Electronic Expansion Valve Check - Daikin J Series Service Manual

Check

5. Check

5.1

Fan Motor Connector Output Check

Check No.01 1. Check the connection of connector.
2. Check the motor power supply voltage output (pins 4 - 7).
3. Check the motor control voltage (pins 4 - 3).
4. Check the rotation command voltage (pins 4 - 2).
5. Check the rotation pulse (pins 4 - 1).
5.2

Electronic Expansion Valve Check

Check No.04 Conduct the followings to check the electronic expansion valve (EV).
1. Check to see if the EV connector is correctly connected to the PCB.
2. Turn the power off and on again, and check to see if the EV generate latching sound.
3. If the EV does not generate latching sound in the above step 2, disconnect the connector
4. Check the continuity between the pins 1 - 6, 2 - 6, 3 - 6, and 4 - 6. If there is no continuity
5. If the continuity is confirmed in the above step 3, the outdoor unit PCB is faulty.
Note: Please note that the latching sound varies depending on the valve type.
123
S1
7
6
5
4
3
2
1
and check the continuity using a tester.
between the pins, the EV coil is faulty.
Motor power supply voltage (310 ~ 340 VDC)
Unused
Unused
GND
Motor control voltage (15 VDC)
Rotation command voltage (1 ~ 6 VDC)
Rotation pulse
Harness 5P
(5)
S20
Check
6P Connector
1 2 3 4 5 6
SiBE041101
(R12099)
6-1
6-2
6-3
6-4
(R14212)
Service Diagnosis