SMA SUNNY CENTRAL Maintenance manual - Manual (Page 43)

SMA Solar Technology AG Maintaining the inside of the switch cabinet
Maintenance Manual SCWAR-WEN094020 43
5.7 Checking the heating and the hygrostat
Depending on the switch cabinet model and production version, one ore several heating models of
the Rittal, Stego or Heine company are installed.
You can locate the exact position, number of heaters, and the corresponding hygrostats using the
reference designation of the components in the provided circuit diagram.
View of the installed heaters and hygrostats
Rittal heating (300 W)
Stego heating (300 / 400 W)
Different types of construction
Heaters of the similar construction type of the company Heine are also installed in a few
switch cabinets.