SMA America, LLC
Troubleshooting
Installation Guide
SB8-10TL-IUS103811
55
Setting the jumper
The Sunny Boy recognizes the jumper only after the system has been restarted (i.e. all LEDs must have
gone out before a restart).
1. Open the Sunny Boy as described in section 8.1 ”Opening the Sunny Boy” (page 48)
2. Plug the provided jumpers in the slots on the system control board as shown below.
3. Close the Sunny Boy as described in section 8.2 ”Closing the Sunny Boy” (page 49).
4. Check the air-flow of the fans.
The Sunny Boy sucks air in from underneath and then blows it back out on the upper sides. Listen
for any unusual noise, which could indicate incorrect installation or that the fans are faulty.
5. After checking the fans, remove the jumpers. Open and close the Sunny Boy as described in
section 8 ”Opening and closing” (page 48).
10 Troubleshooting
Should the Sunny Boy display other blink codes or display messages than those described in section
7 ”Commissioning” (page 42), please refer to the operating manual of the Sunny Boy to find the
exact meaning of the display message or the blink code and, if necessary, the details on
troubleshooting.
Do not attempt to carry out repairs other than those described here. Instead, use the SMA
replacement and repair services. You can find more information on the replacement and repair
services in the warranty conditions included with the Sunny Boy.
10.1 The red LED is on continuously
A ground fault exists in the PV generator
Proceed as follows:
1. Disconnect the Sunny Boy from both the DC and AC connections, as described in section
