Service Manual
TROUBLESHOOTING
Alarm
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Is LED1 on PCB of
outdoor unit B, C and D
turned ON?
Is operating line between
outdoor units loose
or disconnected?
No
No
Turn ON power supply.
Replace PCB of
outdoor unit B, C or D.
Correctly connect
operating line between
outdoor units. Also, reset
power supply.
Replace PCB of
outdoor unit B, C or D.
Check cause and
replace fuse.
Yes
Yes
Yes
No
Check power supply
of outdoor unit.
Is fuse of 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 ...