Hitachi RAS-(3-6)HVNC1(E) - Page 407

10 Servicing
393
SMGB0087 rev.0 - 12/2013
10
10.5.12 Removing solenoid valve coil (SVA and SVC)
1 Remove the service cover following “10.5.1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) and PCN14 (SVC) on O.U.
PCB1. Remove the xing screw, and remove the solenoid valve
coil (SVA and SVC) upward.
4 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.
Solenoid valve
coil (SVC)
Solenoid valve coil screw
Solenoid valve
coil (SVA)
10.5.13 Removing reversing valve
1 Remove the service cover, the bottom service cover and the rear cover following “10.5.1Removingservicecover” and
“10.5.4Removingthebottomservicecoverandrearcover”.
2 Remove the reversing valve coil according to “10.5.10Removingrever-
singvalvecoil”.
3 Recover the refrigerant from check joints according to “10.5.7Removing
thecompressor”.
4 Remove the reversing valve assemblies from the xed positions (5 bra-
zing 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 wi-
rings 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 “10.5.7Removingthecom-
pressor”.
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
Brazing part
(to heat exchanger)
Detail
4 Brazing
parts
Brazing part
Pipe insulation