Hitachi RAS-(2-6)HVNP1(E), Service Manual

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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 figures.
- 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 fix
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 fix 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 fin).
Fixing Screw
(4 pcs.)
Inverter PCB
Fixed with Cord Clamp
Inverter PCB
Fixed with cord clamps
4 fixing
screws