Installation Instructions
SMA Solar Technology AG Commissioning the Sunny Boy
Installation Guide SB11_12_17-IEN100132 31
PV overvoltage
(Yellow LED flashes 4 times quickly in succession)
1. Check DC voltage!
2. If the message occurs again, disconnect the Sunny Boy again and contact the Serviceline of
SMA Solar Technology (see section 13 "Contact" (page47)).
NOTICE!
Excessive DC input voltage can destroy the Sunny Boy!
Immediately disconnect the Sunny Boy from the grid!
1. Turn off the line circuit breaker.
2. Remove the Electronic Solar Switch.
3. Disconnect the DC plug connectors.
Result Action
☑ The DC voltage is higher than the
maximum input voltage.
• Contact the planner / installer of the PV
generator.
☑ The DC voltage is lower than the
maximum input voltage.
• Reconnect the Sunny Boy to the PV
generator as described in section
5.5 "Connecting the PV Generator (DC)"
(page23).