SMA STP 10000TL-10 Installation - Manual (Page 89)

SMA Solar Technology AG 12 Troubleshooting
Installation Manual STP10-17TL-IA-en-32 89
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 53).