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Components
Service manual
76
RXM20~71R + ARXM25~71R + FTXM20~71R + ATXM25~50R +
FVXM25~50A
Split New Perfera R32
ESIE20-11 – 2021.01
To perform a mechanical check of the expansion valve
Prerequisite:
Power OFF the unit for 3 minutes. Then turn ON the unit and listen to
the expansion valve assembly. If the expansion valve does NOT make a latching
sound, continue with the electrical check of the expansion valve, see
75].
Prerequisite:
Stop the unit operation via the user interface.
Prerequisite:
Turn OFF the respective circuit breaker.
Prerequisite:
Remove the required plate work, see
151].
1
Remove the expansion valve insulation and visually check:
▪
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
79].
2
Remove the expansion valve coil from the expansion valve body, see
79].
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
75].
No
Replace the expansion valve body, see
To perform an electrical check of the expansion valve
1
First perform a mechanical check of the expansion valve, see
75].
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±4 Ω
Содержание Perfera ARXM R Series
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