Removing Solenoid Valves - Hitachi RAS-(3-6)HVNC1(E) Service Manual

10 Servicing
10.6.13 Removing Electronic expansion Valve and Solenoid Valve
1 Remove the service cover, the bottom service cover and the rear cover following
"10.6.4 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
and solenoid valves coils".
Removing electronic expansion valve
1 Remove the brazed parts as shown in the figure.
- 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 fix them by the plastic band.
Removing solenoid valves
1 Remove the brazed parts and the flare connections as
shown in the figures.
- 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 flare 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 fix them by the plastic band
408
SMGB0087 rev.0 - 12/2013
"10.6.1 Removing service cover"
"10.6.10 Removing reversing
Electronic expansion valve
Brazing parts
Brazing
Flare nut
part
Solenoid valve Flare nut
(SVF)
P view
and
Solenoid valve
(SVA)
Brazing part
Solenoid valve
(SVC)
Brazing part