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Service Manual
4-31
MAINTENANCE
4.1.13.3 Removing Solenoid Valve (SVA, SVG)
(1) Remove the front service cover according to Section 4.1.1 “Removing Front Service Cover”.
(2) < (H,Y)VAHP072 - 120B(3,4)1S (Heat Pump System) >
Close high/low pressure gas stop valve and liquid stop valve.
< (H,Y)VAHR072 - 120B(3,4)1S (Heat Recovery System) >
Close high/low pressure gas stop valve, low pressure gas stop valve and liquid stop valve.
(3) Recover refrigerant in the outdoor unit from low pressure access port and high pressure access port.
Ensure that the pressure does not increase at this time.
NOTE:
If the pressure increases, collect all the refrigerant in the system.
(4) Remove the solenoid valve coils according to Section 4.1.13.2 “Removing Solenoid Valve Coil”.
(5) Unbraze at the following segments:
Solenoid Valve Coil (SVA): Two brazing segments
Solenoid Valve Coil (SVG): Two brazing segments for each valve
NOTE:
1. When performing brazing work, cover the solenoid valve with a wet cloth for cooling.
2. Pay attention not to burn the connecting wiring and piping insulation while brazing.
(6) For reassembly, perform the removal procedure in reverse order.
TURN OFF all power source switches.
Tool
Phillips Screwdriver, Charging Hose,
Torch, Wet Cloth, Pliers
SVA
SVG
Unbrazing
Segment
Unbrazing
Segment
SVG
Unbrazing
Segment
Unbrazing
Segment
SVA
< Solenoid Valve >
Ɣ
(H,Y)VAHP072B(3,4)1S,
(H,Y)VAHR072B(3,4)1S
Ɣ
(H,Y)VAHP096, 120B(3,4)1S,
(H,Y)VAHR096, 120B(3,4)1S
Summary of Contents for YVAHP072B31S
Page 2: ......
Page 10: ...viii Service Manual ...
Page 16: ......
Page 17: ...Service Manual 1 1 INSTALLATION 1 Installation ...
Page 577: ...Service Manual 1 561 INSTALLATION 9 Touch Back to return to the Service Menu screen 9 ...
Page 920: ......
Page 921: ...Service Manual 2 1 OPERATION 2 Operation ...
Page 1315: ...Service Manual 3 1 TROUBLESHOOTING 3 Troubleshooting ...
Page 1461: ...Service Manual 4 1 MAINTENANCE 4 Maintenance ...
Page 1728: ......
Page 1729: ...Service Manual 6 1 FIELD WORK INSTRUCTIONS 6 Field Work Instructions ...
Page 1738: ...6 10 Service Manual FIELD WORK INSTRUCTIONS 6 8 Mollier Chart for R410A ft 3 l b ...
Page 1739: ...SERVICE PARTS LIST Service Manual 7 1 7 Service Parts List ...
Page 1795: ......
Page 1796: ... 2015 Johnson Controls Inc SM 15001 ...