Hitachi RAS-(4-12)HNP(1)(E) - Removing Solenoid Valves

10 Servicing
408
SMGB0087 rev.0 - 12/2013
10.6.13 Removing Electronic expansion Valve and Solenoid Valve
1 Remove the service cover, the bottom service cover and the rear cover following “10.6.1Removingservicecover” and
“10.6.4Removingthebottomservicecoverandrearcover”.
2 Recover the refrigerant from check joints according to “10.6.7Removingthecompressor”.
3 Remove the coils according to “10.6.11Removingelectronicexpansionvalvecoil”and “10.6.10Removingreversing
andsolenoidvalvescoils”.
Removing electronic expansion valve
1 Remove the brazed parts as shown in the gure.
- Electronic Expansion Valve (EVO) Brazed Parts: 2
a. Remove the electronic expansion valve with cooling
the valve bodies by wet cloth.
b. Perform the brazing work with attention not to burn
the electrical wirings and the piping insulations.
2 When reassembling after replacing the valves, perform
in the reverse procedure of removing.
N O T E
Run the lead wires to be located to the original position,
andxthembytheplasticband.
Electronic expansion valve
Brazing parts
Removing solenoid valves
1 Remove the brazed parts and the are connections as
shown in the gures.
- Solenoid Valve (SVA) Brazed Parts: 2
- Solenoid Valve (SVC) Brazed Parts: 2
- Solenoid Valve (SVF) Flare connections: 2
a. Remove the solenoid valves with cooling the valve
bodies by wet cloth.
b. Perform the brazing work with attention not to burn
the electrical wirings and the piping insulations.
c. Perform the are connection work using two span-
ners to avoid twisting pipes.
2 When reassembling after replacing the valves, perform
in the reverse procedure of removing.
N O T E
Run the lead wires to be located to the original position,
andxthembytheplasticband
Brazing part
P view
Solenoid valve
(SVF)
Solenoid valve
(SVA)
Solenoid valve
(SVC)
Brazing
part
Flare nut
Flare nut
Brazing part