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How to troubleshoot noise fan on PVxxx inverter?

Inverter making loud noise and believed it might be the matrix fan
Product Line:
PVxxx or PVxxxS
Loose connection, Debris, bad motor
Perform a complete LOTO on the inverter. Check the mounting of the fan and make sure it was mounted properly and secured. Clean and clear all debris around the fan. Once all these were checked, turned the inverter back on and see if the issue remains. If it is still an issue, turn off the inverter and perform LOTO. Open the main cabinet and removed the fuse F7 & F8 then turn the inverter back on again. If the noise is gone then the issue is the fan. If it is not, then call us at 866-519-1470 option 3 & 3 for further support.
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