Removing Electronic Expansion Valve And Solenoid Valve; Removing Electrical Components - Hitachi RAS-2-HVNP Service Manual

10. Servicing
10.4.1.14 Removing Electronic expansion valve and Solenoid valve
1 Remove the service cover, the bottom service cover, the rear cover and the upper cover following
cover, Removing bottom service cover and rear cover
2 Recover the refrigerant from check joints according to
3 Remove the coils according to
4 Remove the brazed parts as shown in the figures.
Electronic Expansion Valve (EVO) Brazed Parts: 2
-
- Solenoid Valve (SVA) 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 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 fix them by the plastic band
10.4.1.15 Removing electrical components
  
Removing control PCB (PCB1)
1 Remove the service cover following
2 Remove all the wiring connected to the control PCB.
D A N G E R
DO NOT touch electrical components while the LED1
(Red) is ON to avoid electrical shock. Wait until the LED
turns off.
3 Remove the 6 holders. Clamp the middle part of the holders
with long-nose pliers and remove it toward front side.
D A N G E R
DO NOT touch the electrical components on the PCB.
Pay attention not to bend or apply much force onto PCB
in order to avoid PCB failure.
405
SMGB0079 rev.0 - 01/2013
and Removing upper
Removing
Removing Electronic Expansion Valve Coil
Removing service cover.
cover.
Compressor.
and Removing Solenoid Valve
Printed Circuit Board (PCB1)
Printed Circuit Board (PCB1)
Removing service
Coil.
Holder Holder
10