SMC Networks Sunny Mini Central SMC 5000A - Manual (Page 72)

Maintenance and Cleaning SMA Technologie AG
Page 72 SMC50A_60A-IEN073320 Installation Guide
12.2 Inspection of the Electronic Solar Switch
Check the Electronic Solar Switch for wear before you attach it.
To do this, check the metal tongues on the inside of the plug for brown discoloration.
If one of the metal tongues is completely burned out (see figure below), then the
Electronic Solar Switch can no longer safely disconnect the DC side. Replacements for
damaged Electronic Solar Switch handles are available from SMA.
Metal tongues
Worn-out metal tongues