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Components
Service manual
55
ATXP20~35 + FTXP20~71 + ARXP20~35 + RXP20~71
Split Comfora R32
ESIE18-01C – 2020.07
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.
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.
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
57].
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.
INFORMATION
Below is an example of the resistance measurements in which the common wire is
connected to pin 6 of the expansion valve coil connector. Connections may differ
according to the type of expansion valve.
▪
Connector pin 1‑6,
▪
Connector pin 2‑6,
▪
Connector pin 3‑6,
▪
Connector pin 4‑6.
a
a
Connector
3
Check the insulation resistance of the coil by measuring the resistance
between the pins of each phase (1, 2, 3, 4) and GND on the unit.
Result:
None of the measurements should be short‑circuit.