Check; How To Check - Daikin SiEN04-306D Service Manual

SiEN04-306D

5. Check

5.1

How to Check

5.1.1 Fan Motor Connector Output Check
Check No.01 1. Check connector connection.
2. Check motor power supply voltage output (pins 4-7).
3. Check motor control voltage (pins 4-3).
4. Check rotation command voltage output (pins 4-2).
5. Check rotation pulse input (pins 4-1).
5.1.2 Electronic Expansion Valve Check
Check No.4 Conduct the followings to check the electronic expansion valve (EV).
1. Check to see if the EV connector is correctly inserted in the PCB. Compare the EV unit and
2. Turn the power off and back on again, and check to see if all the EVs generate latching
3. If any of the EVs does not generate latching noise in the above step 2, disconnect that
4. If no EV generates latching sound in the above step 2, the outdoor unit PCB is faulty.
5. If the conductivity is confirmed in the above step 2, mount a good coil (which generated
Note: Please note that the latching sound varies depending on the valve type.
Service Diagnosis
7
6
5
4
3
2
1
the connector number.
sound.
connector and check the conductivity using a tester.
Check the conductivity between pins 1, 3 and 6, and between pins 2, 4 and 5. If there is no
conductivity between the pins, the EV coil is faulty.
latching sound) in the EV unit that did not generate latching sound, and check to see if that
EV generates latching sound.
∗If latching sound is generated, the outdoor unit PCB is faulty.
∗If latching sound is not generated, the EV unit is faulty.
S1
Motor power supply voltage
Unused
Unused
P.0V (reference potential)
Motor control voltage (15 VDC)
Rotation command voltage (1~ 6 VDC)
Rotation pulse input
Harness 6P

Check

6P Connector
1 2 3 4 5 6
(R1082)
(R3199)
5-2
5-4
6-1
6-3
Check
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