Chapter  3  Analog  Output  Module  AH04DA/AH08DA 
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3.5  Troubleshooting 
3.5.1  Error Codes 
Error 
Code 
Type  Description 
RUN LED 
indicator 
ERROR 
LED 
indicator 
16#A600  Error  Hardware failure  OFF  ON 
16#A601  Error  The external voltage is abnormal.  OFF  ON 
 
3.5.2  Troubleshooting Procedure 
Description  Procedure 
Hardware failure  Return the module to the factory for repair. 
The external voltage is abnormal. 
Check whether the external 24 V power supply to the module 
is normal.