SMA SUNNY CENTRAL Maintenance manual - Manual (Page 40)

Maintaining the inside of the switch cabinet SMA Solar Technology AG
40 SCWAR-WEN094020 Maintenance Manual
5.3 Cleaning the EVR resistor
The EVR resistor is an optional accessory located on the roof of the Sunny Central, or is installed inside
the Sunny Central.
Maintenance work on the EVR
The EVR requires almost no maintenance work, an optical check is sufficient.
DANGER!
Death resulting from electric shock and burning upon touching the medium-
voltage grid's live components.
• Only work on the device when it is switched off and voltage-free.
1. Check the EVR resistor for heavy dust deposits, dirt,
and moisture.
2. If necessary, clean the EVR resistor and conduct
appropriate corrective measures to prevent further
contamination.