SMA SB 4200TL HC Multi-String - Manual (Page 50)

Replacing the Varistors SMA Technologie AG
Page 50 SBTLHCMS-IEN080411 Installation Guide
If no ground fault and no defective varistor were found, there is probably a fault in the
Sunny Boy. In this case, contact the SMA Service Line to discuss what to do next.
15. Switch the line circuit breaker to the "on" posi-
tion.
16. Now check whether the LED display indicates
that the Sunny Boy is functioning correctly.
On