Hitachi RAS-(4-12)HNP(1)(E) - Removing Electronic Expansion Valve and Solenoid Valve; Removing Control PCB (PCB1); Removing Inverter Module

10 Servicing
370
SMGB0087 rev.0 - 12/2013
10.3.14 Removing Electronic expansion Valve and Solenoid Valve
1 Remove the service cover, the bottom service cover and the
rear cover following “10.3.1 Removing service cover”, and
“10.3.4Removingbottomservicecoverandrearcover”.
2 Recover the refrigerant from check joints according to “10.3.7
Removingthecompressor”
3 Remove the coils according to “10.3.11 Removing electronic
expansion valve coil”and “10.3.12 Removing solenoid valve
coil(SVC)”.
4 Remove the brazed parts as shown in the gures.
- Electronic Expansion Valve (EVO) Brazed Parts: 2
- Solenoid Valve (SVC) Brazed Parts: 2
a. Remove the electronic expansion valve and the solenoid
valve with cooling the valve bodies by wet cloth.
b. Perform the brazing work with attention not to burn the elec-
trical 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 (EVO)
Solenoid Valve (SVC)
Brazing Part
Brazing Part
Electronic
expansion
valve
Solenoid
valve (SVA)
Brazing parts
Brazing
parts
10.3.15 Removing electrical components
10.3.15.1 Removing control PCB (PCB1)
6 Remove the service cover following “10.3.1Removingser-
vicecover”.
7 Remove all the wiring connected to the control PCB.
8 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)
10.3.15.2 Removing Inverter module
1 Remove the service cover following “10.3.1Removing
servicecover”in this chapter.
2 Open the P plate turning counter clockwise approxi-
mately 90° following “10.3.9 Opening electricalbox(P
plate)”.
• Check that the LED201 (red) on Inverter is OFF when
the P plate is opened.
3 Remove all the wiring connected on the Inverter.
4 Remove 4 screws which x the Inverter. Hold the wires
placed at the left side.
5 Pull the Inverter toward right side from the front of the
product. (Remove along with the plastic case and the
radiation n).
Fixing Screw
(4 pcs.)
Inverter PCB
Fixed with Cord Clamp
Inverter PCB
Fixed with cord clamps
4 xing
screws