SMA 20000TL Service Manual - Manual (Page 32)

10 Replacing the Surge Arrester
If at least one surge arrester is defective, SMA Solar Technology AG recommends replacing all
surge arresters.
Procedure:
1.
Danger to life due to electric shock
• Disconnect the inverter from all voltage sources and open the lower enclosure lid (see
Section 2.2, page 7).
• Wait 20 minutes before removing the DC protective cover.
2. Release the screws on the DC protective cover
using an Allen key (AF 3), lift the DC protective
cover upwards from below and remove it.
3. Pull all surge arresters out of the slots. To do so,
squeeze the grooved areas on the left and right
sides of the surge arrester.
4. Remove the red protective ring from the middle
contact on the bottom of each surge arrester.
10 Replacing the Surge Arrester SMA Solar Technology AG
Service Manual for Installers STP20-25TL-SG-en-11 32