Hitachi RAS-(2-3)HVRN(S)(2), Service Manual

Page: 392 / 488

10 Servicing
382
SMGB0064 rev.0 - 08/2011
1. Brazing.
2. Reversing valve.
3. Mounting plate.
4. Screw.
5. Compressor.
6. Cover by wet cloth.
1
1
1
1
2
2
3
4
4
5
6
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Removing expansion valve
1 Remove the service cover and rear service panel according to the section Removing service cover , see on page 372 and
Removing the lower part of service panel and rear panel , see on page 373 .
2 Collect the refrigerant from the check joint according to the section Removing the compressor , see on page 375 .
3 Remove the coils according to the section Removing the coils for reversing and solenoid valve (SVA1 SVA2 and SVF) ,
see on page 380 .
4 Remove the brazing as shown in the figure.
• Electronic Expansion Valve (EV0): 2 brazing parts.
• Perform the brazing to remove and reassemble the elec-
tronic expansion valve by cooling with wet cloth.
• Protect the connecting wires and pipe insulation from bra-
zing flame.
1. Expansion valve (EV0).
2. Brazing part.
5 Reassemble the parts in the reverse order of removing proce-
dures.
1
2
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Removing solenoid valve
1 Remove the service cover and the rear service panel according to the sections Removing service cover , see on page 372
and Removing the lower part of service panel and rear panel , see on page 373 described in this chapter .
2 Collect the refrigerant from the check joint according to the section Removing the compressor , see on page 375 in this
chapter.
3 Remove the solenoid valve coil according to the section Removing expansion valve , see on page 382 in this chapter.
4 Remove the brazing and flare nuts. Using a blowtorch and previously cooling the pipe side with wet cloth in order to
avoid brazing material entering the reversing valve.
5 Perform the brazing to remove and reassemble the solenoid valve.
6 Protect the connecting wires and pipe insulation from the brazing flame.
7 Remove the flare nuts with two spanners to avoid twisting.
8
Reassemble the parts in the reverse order of removing order of removing procedures.