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Components
Service manual
73
RXTM-R+RXTP-R+ARXTP-R+RXTA-B+FTXTA30B2V1B(W)
(B)+35M5V1B
R32 Optimized Heating 4 Split
ESIE21-12A – 2022.02
2
Remove the expansion valve coil from the expansion valve body, see
76].
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 firmly slid onto 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?
Action
Yes
Perform an electrical check of the
expansion valve, see
No
Replace the expansion valve body, see
76].
To perform an electrical check of the expansion valve
1
First perform a mechanical check of the expansion valve, see
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
Location (PCB) Connector
Winding
resistance
Main
expansion
valve
Y1E
Main
S20
46±3 Ω
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.
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