Hitachi RAS-(3-6)HVNC1(E) - Page 449

10 Servicing
435
SMGB0087 rev.0 - 12/2013
10
10.8.12 Removing solenoid valve coil (SVA)
1 Remove the service cover following “10.8.1Removingserviceco-
ver”.
2 Open the P-mounting plate. Check to ensure the LED201 (Red) of
the inverter PCB (PCB2) is OFF.
3 Unplug the connector PCN7 (SVA) on O.U. PCB1.
4 Remove the xing screw, and remove the solenoid valve coil (SVA)
upward.
5 When reassembling after replacing the solenoid valve coil, perform
the procedure in the reverse way of removing.
N O T E
Fixthewiresbyplasticbandstotheoriginalposition.
A
Solenoid valve coil (SVA)
Ebox
10.8.13 Removing reversing valve
1 Remove the service cover, the bottom service cover and the rear cover following “10.8.1Removingservicecover” and
“10.8.4Removingthebottomservicecoverandrearcover”.
2 Remove the reversing valve coil according to “10.8.10Removingreversingvalvecoil”.
3 Recover the refrigerant from check joints according to “10.8.7Removingthecompressor”.
4 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.
5 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.
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 “10.8.7Removingthecompressor”.
7 Reassemble the parts in the reverse order of removing procedures.
Brazing part
(discharge pipe)
Brazing part
(to heat exchanger)
Brazing part
(to accumulator)
Brazing part
(Gas stop valve)
Reversing valve
Detail
4 Brazing
parts
Brazing part
Pipe insulation