Daikin FTXP20-71L Service Manual page 64

3 | Components
To perform an electrical check of the expansion valve
Service manual
64
▪ For oil drops around the expansion valve. Locate and fix as necessary.
▪ Pipes for signs of damage. Replace pipes as needed.
▪ Coil wires for signs of damage. Replace expansion valve coil as needed. See
"3.3.2 Repair procedures" [
2 Remove the expansion valve coil from the expansion valve body, see
"3.3.2 Repair procedures" [
3 Slide the expansion valve magnet over the expansion valve body and gently
rotate the magnet clockwise/counterclockwise to manually close/open the
expansion valve. Listen to check if the valve is closing/opening and manually
close the valve when check is done.
INFORMATION
After the check, remove the magnet from the expansion valve body and install the
expansion valve coil on the expansion valve body. Make sure that the expansion
valve coil is correctly installed on the expansion valve body.
INFORMATION
It is highly recommended to perform a power reset after checking the valve using a
magnet.
Does the expansion valve open?
Yes
No
1 First perform a mechanical check of the expansion valve, see
4
procedures" [ 63].
2 Disconnect the electrical connector of the expansion valve coil from the
appropriate PCB and measure the resistance of all windings (between the pins
of each phase (wire) and the common wire) using a multi meter. All
measurements MUST be approximately the same.
Name Symbol
Main Y1E
expansion
valve
INFORMATION
Below are shown examples of the resistance measurements in which the common
wire is connected to pin 5 or to pin 6 of the expansion valve coil connector.
Connections may differ according to the type of expansion valve.
▪ Connector pin 1‑5,
▪ Connector pin 2‑5,
▪ Connector pin 3‑5,
▪ Connector pin 4‑5.
4
67].
4
67].
Action
Perform an electrical check of the
expansion valve, see
procedures" [
Replace the expansion valve body, see
"3.3.2 Repair
Location (PCB) Connector
Main S20
ATXP20~35 + FTXP20~71 + ARXP20~35 + RXP20~71
"3.3.1 Checking
4
63].
4
procedures" [ 67].
"3.3.1 Checking
Winding
resistance
46±4 Ω
Split Comfora R32
ESIE18-01E – 2023.01