Sinclair SDV 6 Service Manual page 115

8.1.45 U11 - Unit model code not set
Error display
1) The faulty IDU stops running.
2) Other IDUs of the same system:
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
Error impact
ODU of the same system:
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
Error trigger
When detecting that the unit model code for IDU main control board is not set
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.
112
Digital display
If the address for the faulty IDU has been set, other IDUs will operate normally.
If the address of the faulty IDU was not set, other IDUs will display error code "A51"-ODU fault. (The
indoor unit of SDV5 plat. displays "Ed" code)
If the address for the faulty IDU has been set, the ODU will operate normally.
If the address of the faulty IDU was not set, the ODU will display the error code "C26" -number of IDUs
reduced. ( T he outdoor unit of SDV5 platform displays "H7" code.)
The unit model code has not been set after replacing the IDU main control board.
The IDU main control board is damaged.
Use the dedicated tooling
(1) to set the model code
for the main control
board of IDU, and power
on the unit again
Is the fault cleared?
Fault cleared
U11
No
Yes
Display position
Panel, display box, and wired controller
Replace the main control
board of the IDU