SMA STP 8000TL-10 - Manual (Page 91)

SMA Solar Technology AG 12 Troubleshooting
Installation Manual STP8-17TL-IA-en-31 91
4. Remove all surge arresters from the slots. To do this,
compress the grooved areas on either side.
☑ If a green strip is visible in the window (A), the
surge arrester is in perfect working order.
☑ If a red strip is visible in the window (A), the
surge arrester is defective.
5. Install new surge arresters (see Section 6.7
"Retrofitting a Surge Arrester Type II", page 55).