Expansion Valve; Checking Procedures - Daikin RXTA30B2V1B Service Manual

4 | Components

4.4 Expansion valve

4.4.1 Checking procedures

To perform a mechanical check of the expansion valve
Service manual
72
a Compressor wire terminals cover
5 Install the compressor insulation.
Is the problem solved?
Yes
No
INFORMATION
It is recommended to perform the checks in the listed order.
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
"4.4.1 Checking procedures" [
Prerequisite: Stop the unit operation via the user interface.
Prerequisite: Turn OFF the respective circuit breaker.
Prerequisite: Remove the required plate work, see
1 Remove the expansion valve insulation (if applicable) 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
"4.4.2 Repair procedures" [
a
Action
No further actions required.
Return to the troubleshooting of the
specific error and continue with the
next procedure.
4
72].
"4.17 Plate
4
76].
RXTM-R+RXTP-R+ARXTP-R+RXTA-B+FTXTA30B2V1B(W)
(B)+FTXTM30+40R2V1B+FTXTP25+35M5V1B+ATXTP25+35M5V1B
4
work" [ 144].
R32 Optimized Heating 4 Split
ESIE21-12A – 2022.02