Error Code 13 & 14 is inverter hardware faults .
It may not actual fault to caused inverter problem ,
Please get customer to verify as below step ,
Go to Main Menu
Press 2 ( Status & Faults )
Press 1 ( View Faults )
Press 3 ( Active Faults ) -- Please take the photo
Press Menu ( back to earlier step )
Press 1 ( Clear Faults )
Press Menu twice ( back to main menu ) and restart the inverter .
If inverter having problem , please repeat above with taking the faults photo, it will showing the actual fault cause inverter to stop .
Please send the photos to me, George and KP Leung of Satcon. Thanks.