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Why is my GT inverter faulting with faults 0018, 0033, 0071 or 0073, etc?

Issue:
Inverter faults on 0018, 0033, 0071 and 0073 and can be reset manually.

Product Line:
GTxxx Series inverter 

Environment:

Cause:
Grid event and software

Resolution:
Note: The work instruction provided is meant for those who are qualified to work on the inverter. This means that they should know how to properly Lock out and Tag Out (LOTO) the inverter...,etc.

In most cases, these faults can be reset and the inverter will continue to run. We refer to these faults as nuisance faults. When you look at the fault history on the inverter, you will see the following:
Example:  1/12/2016   11:16:08       33 - Ground over current
                1/12/2016   11:16:08       92 -  Fast AC voltage low

From the example above, you can see that there was a grid related event (AC voltage or frequency Hi\Low). In this case, it is an AC voltage low fault occurring at the exact same time and date a ground over current fault occurred. This is because when there is a grid event, the CCU loses power. When the grid returns, the CCU latches on to any one of the 5 binary inputs (0016, 0018, 0033, 0071 and 0073). Solution: You need to upgrade the CCU software to the latest revision on Solar Exchange. For the GT250 or GT500, you MUST make sure that the unit has the dual power supply upgrade before you upgrade to the latest software.        

The GT100 does not have this auto clear feature in its software. 
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