SMA inverter trouble

[smag]

New to forum so first post. Hello!
Just installed a 21 x 190Wp system using a SMA SB4000TL inverter. Have 2 strings of 8 on input A and one of 5 on input B.
Keep getting error message 1 stating Too much generation for the inverter and trips out. Will operate on the 5 string but obviously at reduced capacity. All settings seem fine.
Any suggestions?

Thanks
Smag

 

[Eco Deal]

No sure just a quick one , should be 14 in port A and 7 in port B !!!!!!!

That set up gives a yeild loss on sma sunny design ?????

but may not be reason for triping