Service Manual
3-69
TROUBLESHOOTING
O
7KH581LQGLFDWRUUHGÀDVKHV
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The indoor unit number (refrigerant cycle number - address number), the alarm code, the model code*
1)
,
the model name*
1)
and the number of connected indoor units are displayed on the LCD. The indoor unit
number and the alarm code are displayed on the 7-segment display of the outdoor unit PCB.
*1) Except for some models.
Alarm
Code
Abnormal Communication between Outdoor Units
Unit A
(Main)
Unit B
(Sub)
Unit C
(Sub)
Unit D
(Sub)
Outdoor Unit
No
Yes
No
Yes
No
Yes
Is operating line between outdoor
unit A and outdoor unit B connected
to H-LINK transmission terminal?
Is operating line between outdoor
unit A and outdoor unit C connected
to H-LINK transmission terminal?
Is operating line between outdoor
unit and another outdoor unit
connected INCORRECTLY?
Correctly connect wiring between
outdoor unit and another outdoor
unit and reset the power supply.
Abnormality of O.U. PCB in
outdoor unit A
Connect operating line between
outdoor unit A and outdoor unit B
to transmission terminal between
outdoor units.
Also, reset the power supply.
Connect operating line between
outdoor unit A and outdoor unit C
to transmission terminal between
outdoor units.
Also, reset the power supply.
No
Yes
Is operating line between outdoor
unit A and outdoor unit D connected
to H-LINK transmission terminal?
Connect operating line between
outdoor unit A and outdoor unit D
to transmission terminal between
outdoor units.
Also, reset the power supply.
communication terminal?
communication terminal?
communication terminal between
communication terminal between
communication terminal between
communication terminal?
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 ...