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Why is my Conext CL showing an alarm code: 9000 (DC Internal Error Service Alarm)

Issue: 
Customer is calling in to confirm an alarm code: 9000 (DC Internal Error Service Alarm)

Product Line: 
Conext CL 18000NA Conext CL 25000NA Conext CL 20000E Conext CL 25000E

Environment:  
On site troubleshooting

Resolution: 
Reset unit by turn off both AC and DC 
If problem persists, reset the unit
Update firmware to latest version from SE Solar Website ensuring that Control Boot firmware is at lest v2.02.03

Cause:
PV current measured exceeds unit rating
Internal DC bus voltage too high
Difference between top or bottom DC bus voltage too high
Dc bus voltage too low
DC voltage sensor measurement failure
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