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Si21-205
Outdoor Unit (25/35 class)
Removal Procedure
281
4
Remove the motor
valve coil.
Confirm that the
refrigerant is completely
empty in the refrigerant
circuit before starting
work.
Caution
Be careful about four-way
valve, pipes and so on, which
were heated up by a gas
brazing machine, so as not to
get burnt on your hands.
Cautions at the restoration.
1. Restore the piping by non-
oxidation brazing. Braze it
quickly unless nitrogen gas
can be used.
2. It is required to prevent the
carbonization of the oil inside
the four way valve and the
deterioration of the gaskets
affected by heat. For the
sake of this, wrap the four
way valve with wet cloth and
make up water so that the
cloth will not be dried and
avoid excessive heating. (It
keeps below 120˚C).
Be careful so as not to break
pipes by pressing the pipes
excessively by pliers when
withdrawing the piping.
5
Provide a protective
sheet or a steel plate
so that the brazing
flame can’t influence
the circumstance
around the four way
valve.
6
Heat up the four
portions of brazing
parts on the four way
valve. Remove the four
way valve (a), (b), (c),
(d).
Step
Procedure
Points
Summary of Contents for Sky Air B-Series R-410A
Page 7: ...Si21 205 vi Table of Contents ...
Page 15: ...Models Si21 205 4 Model Name and Power Supply ...
Page 16: ...Si21 205 Functions 5 Part 2 Functions 1 List of Functions 6 ...
Page 35: ...Wireless Remote Controller Si21 205 24 Remote Controller ...
Page 79: ...Settings Concerning Maintenance Si21 205 68 Field Setting Detail of PCB 2 ...
Page 83: ...Maintenance Mode Setting Si21 205 72 Field Setting ...
Page 239: ...Troubleshooting for Outdoor Unit 50 60 class Si21 205 228 Troubleshooting ...
Page 321: ...Outdoor Unit 50 60 class Si21 205 310 Removal Procedure ...