Hitachi RASC-10HNPE, Service Manual, Page: 175 / 306

9 Servicing
Removing components
SMGB0091 rev.2 - 11/2015 165
9
4 When reassembling after replacing the solenoid valve
coil, perform the procedure in the reverse order of
removing.
?
N O T E
Fix the wires by plastic bands to the original position.
Solenoid valve coil (SVA)
Solenoid valve coil (SVC)
Solenoid valve coil screw
9.3.15 Replacement of the reversing valve
1 In order to access to the unit’s internal parts, remove the following covers and panels depending on access
restrictions:
a. If upper cover can be removed, remove it as described in section
“9.3.6 Removing upper cover”
and access to the
unit’s internal parts from the upper side.
b. If upper cover cannot be removed, remove the cycle service cover as described in section “9.3.1 Removing cycle
service cover” .
2 Collect the refrigerant as explained in section
“3.4.4
Pump down refrigerant”
.
3 Remove the reversing valve coil according to the section
“9.3.12 Replacement of the reversing valve coil”
4 Remove the reversing valve assemblies from the 4
brazed parts (*) where it is fixed. Remove the brazing
of the reversing valve using a blowtorch. Cool down the
piping side covering it with wet cloth, in order to avoid
brazing material entering the reversing valve. Protect the
connecting wires and pipe insulation from the brazing
flame.
5 Remove the reversing valves from its assemblies (4
brazed parts).
Perform the brazing with a blowtorch remove and
reassemble the reversing valve by cooling the pipes first
with wet cloth in order to avoid brazing material entering
the reversing valve.
6 When reassembling after replacing the reversing valve,
perform the procedure in the reverse way of removing.
?
N O T E
Fix the wires by plastic bands to the original position.
Reversing valve
*
*
*
*
Cover with wet cloth
Reversing valve