Check; How To Check - Daikin F-Series Service Manual

Check

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 Limit Switch Continuity check
Check No.03
Remove the front grille. The limit switch is located at the left side of the drain pan assembly.
Check the continuity of the switch connection.
∗ The shutter can be opened and closed with hand. Keep the shutter open and closed all the
5.1.3 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 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 continuity is confirmed in the above step 3, mount a good coil (which generated
Note: Please note that the latching sound varies depending on the valve type.
146
Upward
Limit switch
way for each continuity check steps.
the connector number.
sound.
connector and check the continuity using a tester.
Check the continuity 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
7 Motor power supply voltage
6 Unused
5 Unused
4
P.0V (reference potential)
3 Motor control voltage (15 VDC)
2 Rotation command voltage (1~ 6 VDC)
1 Rotation pulse input
Tester
Forward
SiEN12-710A
(R3199)
Shutter status Open Closed
Continuity Continuity No continuity
Service Diagnosis
(Q0363)