Sinclair SDV 6 Service Manual page 117

8.1.47 U26 - Mismatch between indoor unit model and outdoor unit model
Error display
1) The faulty IDU stops running.
2) Other IDUs of the same system will operate normally
Error impact
ODU of the same system:
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Error trigger
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Error recovery
Automatic recovery
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Possible cause
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Troubleshooting
Note:
1.For specialized tooling and instructions, please contact your local dealer or technical support personnel.
2.Please contact your local dealer or technical support staff to confirm the detail.
114
Digital display
If there is one IDU in the system is operating normally, the ODU will operate normally.
If all the IDUs in the system are display error code "U26", the ODU will operate normally.
There is a conflict between the model series code of indoor unit and the model series code of outdoor unit
The communication flag bit (Myhome identification flag bit) between indoor unit and outdoor unit has a
matching conflict
Model series code setting error when replacing the main control board of indoor unit.
Mismatch between indoor unit model and outdoor unit model in the same system.
Myhome configuration code setting error when replacing the main control board of indoor unit
Myhome configuration indoor unit and non-Myhome configuration outdoor unit are connected in one
system
Non-Myhome configured indoor unit and Myhome configured outdoor unit are connected in one system
U26
Panel, display box, and wired controller
Cause 1:Model series
code setting error when
replacing the main control
board of indoor unit.
Cause 2:Myhome
configuration code setting
error when replacing the
main control board of
indoor unit
Cause 3:Mismatch
between indoor unit
model and outdoor unit
model in the same
system.
Cause 4:Myhome
configuration indoor unit
and non-Myhome
configuration outdoor
unit are connected in
one system
Cause 5:Non-Myhome
configured indoor unit
and Myhome configured
outdoor unit are
connected in one system
Display position
Use the dedicated tooling
(1) to set the model code
for the main control board
of IDU, and power on the
unit again
Use the dedicated tooling
(1) to set the Myhome
code for the main control
board of IDU, and power
on the unit again
Replace the
outdoor unit or
indoor unit(2)
Replace the outdoor
unit or indoor unit(2)
Replace the outdoor
unit or indoor unit(2)