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Why is my Conext CL showing an alarm code: 4660 (AC Mod OT Wrn Service Alarm)

Issue: 
Customer is calling to confirm an alarm code: 4660 (AC Mod OT Wrn Service Alarm)

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

Environment:  
On site troubleshooting

Resolution: 
Check cooling (fans, air inlet, air outlet, installation conditions)
AC module sensor has crossed nominal operating range and the inverter starts to derate output power
If nothing abnormal, call local Technical Support for assistance in troubleshooting and starting an RMA

Cause:
High external temp, cooling problem, internal circuit detection issue
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