Replacement Of The Expansion Valve And Solenoid Valves (Sva, Svc) - Hitachi RASC-4HNPE Service Manual

9 Servicing
Removing components

9.3.16 Replacement of the expansion valve and solenoid valves (SVA, SVC)

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
unit's internal parts from the upper side.
b. If upper cover cannot be removed, remove the cycle service cover as described in section
service cover".
2 Collect the refrigerant as explained in section
Pump down refrigerant".
3 Remove the coils according to the sections
Replacement of the expansion valve coil"
Replacement of the solenoid valve coil (SVA and SVC)"
in this chapter.
4 Remove the brazing parts using a blowtorch and
previously cooling the pipe side with wet cloth in order
to avoid brazing material entering the reversing valve.
5 Protect the connecting wires and pipe insulation from
the brazing flame.
6 When reassembling after replacing the expansion
valve or the solenoid valves, perform the procedure in
the reverse order of removing.
?
N O T E
Fix the wires by plastic bands to the original position.
166 SMGB0091 rev.2 - 11/2015
"9.3.6 Removing upper cover"
"3.4.4 Expansion valve
"9.3.13
and "9.3.14
Brazed parts
and access to the
"9.3.1 Removing cycle
Solenoid valve coil
Solenoid valve