Sinclair SDV 6 Service Manual page 118

8.1.48 U38 - Address code not detected
Error display
1) The faulty IDU stops running.
2) Other IDUs of the same system: The fan continues running, the EEV is closed, and ODU error code
Error impact "A51" is displayed (SDV5 plat. IDU displays the code "Ed").
ODU of the same system: Otherwise, the ODU will display the error code "C26" (number of IDUs reduced)
(SDV5 plat. ODU displays the code "H7")
Error trigger When detecting that the address code for IDU main control board has not been set
Error recovery
Automatic recovery

Possible cause

Troubleshooting
Note 1: For instructions on how to set up addresses for a remote controller or a wired controller, please refer
to relevant manuals.
Digital display
The address code has not been set after replacing the IDU main control board.
The new IDU main control board is damaged.
Use the remote controller
or wired controller (1) to
set the address code for
the main control board of
IDU, and power on the
Is the fault cleared?
Fault cleared
U38
unit again
No
Yes
Display position
Panel, display box, and wired controller
Replace the main control
board of the IDU
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