Hitachi RAS-(3-6)HVNC1(E) - Page 394

10 Servicing
380
SMGB0087 rev.0 - 12/2013
10.4.12 Removing solenoid valve coil (SVA and SVC)
1 Remove the service cover and the upper cover following
“10.4.1Removingservicecover” and “10.4.3Removingupper
cover”.
2 Unplug the connector PCN7 (SVA) and PCN14 (SVC) on O.U.
PCB1.
3 Remove the xing screw, and remove the solenoid valve coils
(SVA and 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 Coil (SVC)
Fixing Screws for Solenoid Valve Coil
Solenoid Valve Coil (SVA) (Only for 4 to 7HP)
Solenoid valve coil (SVC)
Solenoid valve coil screw
Solenoid valve coil (SVA)
10.4.13 Removing reversing valve
1 Remove the service cover, the bottom service cover, the rear cover
and the upper cover following “10.4.1 Removing service cover”,
“10.4.4Removing the bottom service cover and rear cover” and
“10.4.3Removinguppercover”.
2 Recover the refrigerant from check joints according to “10.4.7Re-
movingthecompressor”.
3 Remove the reversing valve coil according to “10.4.10Removing
Reversingvalvecoil”.
4 Remove the reversing valve assemblies from the xed positions
(5 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 electri-
cal wirings and the piping insulations.
5 Remove reversing valve from the assemblies. (5 brazing parts) At
this time, perform the brazing work with cooling the reversing valve
body by wet cloth.
6 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 “10.4.7 Removing
thecompressor”.
5 brazing
parts