U12 Horsepower Code Not Set - Midea V8 VRF Series Service Manual

6.1.43 U12 - Horsepower 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 horsepower code for IDU main control board has not been 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.
Digital display
If the address for the faulty IDU has been set, other IDUs will operate normally.
Otherwise, other IDUs will encounter the following situations: The fan continues running, the EXV is
closed, and ODU error code "A51" is displayed (V6 platform IDU displays the code "Ed").
If the address for the faulty IDU has been set, the ODU will operate normally.
Otherwise, the ODU will display the error code "C26" (number of IDUs reduced) (V6 platform ODU
displays the code "H7")
The horsepower code has not been set after replacing the IDU main control board.
The new IDU main control board is damaged.
Use the dedicated tooling
(1) to set the horsepower
code for the main control
board of IDU, and power
on the unit again
Is the fault cleared?
Yes
Fault cleared
Panel, display box, and wired controller
U12
No
V8 VRF Indoor Units
Display position
Replace the main control
board of the IDU
91