Hitachi RAS-(4-12)HNP(1)(E) - Page 450

10 Servicing
436
SMGB0087 rev.0 - 12/2013
10.8.14 Removing Electronic expansion Valve and Solenoid Valve
1 Remove the service cover, the bottom service cover and
the rear cover following “10.8.1Removingservicecover”
and “10.8.4Removingthebottomservicecoverandrear
cover”.
2 Recover the refrigerant from check joints according to
“10.8.7Removingthecompressor”.
3 Remove the coils according to ““10.8.11Removingelec-
tronicexpansionvalvecoil”and “10.8.12Removingso-
lenoidvalvecoil(SVA)”
4 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 sole-
noid 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.
5 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
Solenoid valve
(SVA)
Brazing parts
Brazing parts
10.8.15 Removing electrical components
10.8.15.1 Removing control PCB (PCB1) and relay PCB (PCB3)
1 Remove the service cover following “10.8.1Removing
servicecover”.
2 Remove all the wiring connected to the control PCB
and the relay PCB.
3 Remove the 6 holders for each PCB. Clamp the middle
part of the holders with long-nose pliers and remove it
toward front side.
Holder
Long-Nose Pliers
Noise Filter
Holder
Noise lter
Long nose pliers
Holder
Printed Circuit Board (PCB1)
Printed Circuit Board (PCB3)
Holder