SMA SC 500U Installation - Manual (Page 63)

SMA Solar Technology AG
Installation Guide SC500U-IUS093411 63
11 Maintenance
The Sunny Central inverter must be maintained at regular intervals. Maintenance includes cleaning of
cabinet interior, if necessary.
The maintenance interval depends on the location and the ambient conditions.
11.1 Sunny Central Maintenance Work
* The maintenance interval may need to be shortened, depending on the location or ambient
conditions.
11.2 Replace DC fuse
1. Open the Interface Cabinet as described in section
10.2 "Opening the Interface Cabinet" (page 61).
The DC fuses are fastened with 2 screws each.
2. Remove the 2 screws of each DC fuse.
3. Remove the DC fuses.
4. Mount fuses vertically (spacer).
5. Attach the 2 screws of each DC fuse.
6. Tighten afterwards. Use the torque of 44 ft-lbs
(60 Nm).
7. Close the Interface Cabinet.
Maintenance work Maintenance interval
(recommended)
Check the screens at the air inlets and outlets and clean them if necessary. 6 months *
Check the fans.
6 months *
Check the air filters of the ventilation plate. 6 months *
L+
L+