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V8 VRF Indoor Units
6.1.3 A51 - ODU fault
Error display
The faulty IDU and other IDUs of the same system: The fan continues running, the EXV is closed,
and code "A51" is displayed (V6 platform IDU displays the code "Ed")
ODU of the same system:
Error impact
Error trigger
Duration of ODU error ≥ 10 minutes
Error recovery
Automatic recovery
Possible cause
Troubleshooting
44
Digital display
stops.
The displayed code depends on the error type of the ODU. For the meaning of the code,
please refer to the error table specific to the model of the ODU.
The ODU error is transmitted to the IDU.
The IDU main control board is damaged.
A51
Troubleshoot ODU
according to ODU
Maintenance Guide
Check
whether the fault is
cleared
Yes
Fault cleared
Display position
Panel, display box, and wired controller
No
Replace the main control
board of the IDU
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