SMA STP 8000TL-10 - Manual (Page 72)

10 Maintenance and Cleaning SMA Solar Technology AG
72 STP8-17TL-IA-en-31 Installation Manual
10.3 Checking the Electronic Solar Switch (ESS) for Wear
Check the Electronic Solar Switch for wear before plugging it in.
To do this, check whether the metal tongues (A) inside the plug display any brown discolouration.
If the metal tongues are discoloured or burnt right through (B), the Electronic Solar Switch can no
longer perform reliable disconnection of the DC side.
You must replace the handle of the Electronic Solar Switch before restarting the inverter. You can
obtain replacement handles for the Electronic Solar Switch from your specialist dealer (see Section 15
"Accessories", page 125).