Hitachi RAS-(4-12)HNP(1)(E) - Removing Solenoid Valve Coil (SVC); Removing Reversing Valve

10 Servicing
369
SMGB0087 rev.0 - 12/2013
10
10.3.12 Removing solenoid valve coil (SVC)
1 Remove the service cover and the upper cover following
“10.3.1 Removing service cover” and “10.3.1 Removing ser-
vicecover”.
2 Unplug the connector PCN14 (SVC) on O.U. PCB1.
3 Remove the xing screw, and remove the solenoid valve coil
(SVC) upward.
4 When reassembling after replacing the solenoid valve coil, per-
form the procedure in the reverse way of removing.
N O T E
Fixthewiresbyplasticbandstotheoriginalposition.
Solenoid
valve
Solenoid valve coil
Solenoid valve coil
screw
10.3.13 Removing reversing valve
1 Remove the service cover, the bottom service cover, the rear cover and the upper cover following “10.3.1Removing
servicecover”,“10.3.4Removingbottomservicecoverandrearcover”and “10.3.3Removinguppercover”.
2 Remove the reversing valve coil according to “10.3.10RemovingReversingvalvecoil”.
3 Remove the electrical box according to“10.3.6Removingelectricalbox”.
4 Recover the refrigerant from check joints according to“10.3.7Removingthecompressor”.
5 Remove the valve stay.
6 Remove the reversing valve assemblies from the xed positions (4 brazing parts).
a. Remove the reversing valve and the stop 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 Remove reversing valve from the assemblies. (4 brazing parts) At this time, perform the brazing work with cooling the
reversing valve body by wet cloth.
8 When reassembling after replacing the reversing valves, perform in the reverse procedure of removing.
a. Run the lead wires to be located to the original position, and x them by the plastic band.
b. Attach the crankcase heater according to “10.3.7Removingthecompressor”.
Brazing part
(discharge pipe)
Brazing part
(to heat exchanger)
Brazing part
(to accumulator)
Brazing part
(Gas stop valve)
Check joint
Rear Side
Rear side
4 brazing
parts