Hitachi RASC-10HNPE, Руководство по обслуживанию, Страница: 176 / 306

9 Servicing
Removing components
SMGB0091 rev.2 - 11/2015 166
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 “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 coils according to the sections “9.3.13
Replacement of the expansion valve coil” and “9.3.14
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.
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N O T E
Fix the wires by plastic bands to the original position.
Solenoid valve coil
Brazed parts
Expansion valve
Solenoid valve