SMA America, LLC
Maintenance
Installation Guide
SB50US-80US-eng-IUS112633
85
10.5 Exchanging the Fuses
10.5.1 Exchanging the GFDI Fuse within the Sunny Boy
1. Disconnect the Sunny Boy on the AC and DC sides.
2. Wait 5 minutes until the residual voltage has been drained and the fans are no longer turning.
1. Open the Sunny Boy as described in section 6.2 ”Opening the Sunny Boy” (page 38).
2. Replace the fuse (A).
For the correct position of the fuse, observe section "DC Input Grounding" on page 49.
3. Completely insert the fuse into the terminal.
4. Close the Sunny Boy as described in section 6.7 ”Closing the Sunny Boy” (page 58).
5. Switch the AC and DC disconnect switches back on.
CAUTION
Danger of fire due to incorrectly designed fuse.
Risk of injury due to fire.
• Only replace faulty fuses with fuses of the same type and size.
