Service Manual
TROUBLESHOOTING
Alarm
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Is LED1 turned ON on PCB
of outdoor units B, C, and D?
Is operating line
between outdoor units
loose or disconnected?
No
No
Turn ON the power source.
Replace the PCB of
outdoor unit B, C, or D.
Correctly connect the
operating line between
outdoor units. Also, reset
the power source.
Replace the PCB of
outdoor unit B, C, or D.
Check the cause and
replace it.
Yes
Yes
Yes
No
Check the power source
of outdoor unit.
Is fuse on O.U. PCB
blown?
Good
Faulty
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Unit A
(Main)
Unit B
(Sub)
Unit C
(Sub)
Unit D
(Sub)
Outdoor Unit
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 ...