Hitachi RAS-(4-12)HNP(1)(E) - Page 438

10 Servicing
424
SMGB0087 rev.0 - 12/2013
10.7.14 Removing Electronic expansion valve and Solenoid valve
1 Remove the service cover, the bottom service cover,
the rear cover and the upper cover following “10.7.1
Removing service cover”, “10.7.4 Removing bottom
service cover and rear cover” and “10.7.3 Removing
uppercover”.
2 Recover the refrigerant from check joints according to
“10.7.7Removingthecompressor”.
3 Remove the coils according to “10.7.11Removingelec-
tronicexpansionvalvecoil”and “10.7.12Removingso-
lenoidvalvecoil(SVA)”.
4 Remove the electronic expansion valve coil according
to the item 2.11 “Removing Electronic Expansion Valve
Coil.”
5 Remove the electrical box according to Removing Elec-
trical Box.
6 Remove the brazed parts as shown in the gures.
- Electronic Expansion Valve (EVO) Brazed Parts: 2
- Solenoid Valve (SVA) Brazed Parts: 2
a. Remove the electronic expansion valve and the so-
lenoid 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.
7 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 (EVO)
Solenoid Valve (SVA)
Brazing Part
Brazing Part
10.7.15 Removing electrical components
10.7.15.1 Removing control PCB (PCB1)
1 Remove the service cover following “10.7.1Removingser-
vicecover”.
2 Remove all the wiring connected to the control PCB.
3 Remove the 6 holders. Clamp the middle part of the holders
with long-nose pliers and remove it toward front side.
Holder
Printed Circuit Board (PCB1)
Holder
Printed Circuit Board (PCB1)