SMA SMC 5000 Installation - Manual (Page 49)

SMA Technologie AG Exchanging Varistors
Installation Guide SMC50_60-11:SE2006 Page 49
If you have found neither a ground fault nor a defective varistor there probably is a
fault in the Sunny Mini Central 5000/6000. Please contact the SMA hotline in this
case to discuss further proceedings.
In case there are no spare varistors available the Sunny Mini Cen-
tral 5000/6000 still can feed electricity into the grid. The input is
not protected against overvoltages in this case. Replacement varis-
tors should be obtained as soon as possible. In systems with a high
risk of overvoltages, the Sunny Mini Central 5000/6000 should not
be operated with defective varistors.
9. Attach the lid to the enclosure of the Sunny Mini Central 5000/6000 by tighten-
ing the six screws. Don’t forget the lock washers. The notches of the lock washers
should face to the lid.
10. Connect the faultless strings of the PV panel. En-
sure correct allocation to strings.
11. Close off the unneeded DC input sockets using
the protective caps supplied in the accessories
kit.
12. Switch on the circuit breaker.
13. Check whether the LEDs of the Sunny Mini Cen-
tral 5000/6000 show trouble-free operation.
String A
String B
+ + - -
On!
Off