Daikin FTXB60C - Page 82

Refrigerant Diagram
74
6.2 Electronic Expansion Valve (EXV) checking procedures
a. Check if the EXV connector is correctly connected to PCB.
b. Turn power off and on again, and check if EXV generates a latching sound.
c. If the EXV does not generate a latching sound in above step b., disconnect connector and check
continuity using a multimeter.
d. Check the continuity between pins [1-6, 3-6, 2-5, 4-5 (between pins 1-6, 2-6, 3-6, 4-6 for harness 5P
models)]. If there is no continuity between the pins, EXV coil is faulty.
e. Ifthecontinuityisconrmedinstepd.,outdoorPCBisfaulty.
Harness 6P
6P Connector
1
kcehC02S
(R106366)
1 - 6
3 - 6
2 - 5
4 - 5
2 3 4 5 6
Harness 5P
6P Connector
(5)
1
kcehC02S
(R106366)
1 - 6
3 - 6
2 - 6
4 - 6
2 3 4 5 6
6.3 Four way valve performance checking procedures
6.3.1 Class 25/35
Turn power off and then
on again.
Disconnect four way valve coil
from connector and check the
continuity.
Start heating operation.
Replace four way valve.
S80 voltage at
180-280V with
compressor on?
Four way
valve coil resistance at
Yes
Yes
Replace outdoor PCB.
Replace four way valve coil.
No
*Refer Figure 1 below.
No
(Fig. 1)
Voltage at S80
DC180-280V
DC12-15V
Compressor
ON Time
*Four way valve coil
Not Energized
Heating: Energized