Hitachi RAS-(3-6)HVRNM2E Service Manual page 405

10 Servicing
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Removing reversing valve
1 Remove the service cover and the rear service panel according to the section
and Removing the lower part of service panel and rear
2 Collect the refrigerant from the check joint according to the section
3 Remove the reversing valve coil according to the section
(SVA1 SVA2 and SVF), see on page 393.
4 Remove one (1) fixing screw for the valve-mounting plate.
5 Remove the stop valve at the gas side from the valve-mounting plate by removing the two (2) screws.
6 Remove the reversing valve assemblies from the 4 brazed parts where it is fixed. Remove the brazing of the reversing
valve and the stop valve at the gas 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
frame.
7 Remove the reversing valves from its assemblies 4 brazed parts.
8 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.
9 Reassemble the parts in the reverse order of removing procedures contained in this chapter. When SFV is removed fix
it according to the section
contained in this chapter.
1. Brazing.
2. Reversing valve.
3. Mounting plate.
4. Screw.
5. Compressor.
6. Cover by wet cloth.
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Removing expansion valve
1 Remove the service cover and rear service panel according to the section
Removing the lower part of service panel and rear
2 Collect the refrigerant from the check joint according to the section
3 Remove the coils according to the section
SVF), see on page 393.
4 Remove the brazing as shown in the figure.
395
SMGB0064 rev.0 - 08/2011
Removing expansion valve, see on page 395 and the
panel, see on page 387.
Removing the coils for the reversing and solenoid valves (SVA1 SVA2 and
Removing service
panel, see on page 387 in this chapter.
Removing the compressor, see on page 389.
Removing the coils for the reversing and solenoid valves
Removing solenoid
3
4
1
1
5
Removing service
Removing the compressor, see on page 389.
cover, see on page 385
valve, see on page 396
1
2
1
4
6
2
cover, see on page 385 and
10