Sunny Boy User Manual

6 Troubleshooting
SMA Solar Technology AG
User ManualSBxx-US-1XP-41-BA-en-1158
Event number Message, cause and corrective measures
8503
Self-diagnosis > Input C defective
Corrective measures:
• Check whether a string is connected to input C. If a string that once was
connected is not used anymore, the string-failure detection must be reset.
• Contact the Service.
8708
Timeout in communication for active power limitation
Communication to the system control absent. Depending on the fall-back set-
ting, either the last received values will be retained or the active power will be
limited to the set percentage value of the inverter nominal power.
Corrective measures:
• Ensure that the connection to the system manager (e.g.
SunnyHomeManager) is intact and that no cables are damaged or that
no plugs have been pulled.
8801
8803
No display
No information can be shown on the display.
9002
SMA Grid Guard code invalid
The SMAGridGuard code entered is incorrect. The operating parameters are
still protected and cannot be changed.
Corrective measures:
• Enter the correct SMAGridGuard code.
9003
Grid parameter locked
Changes to the grid parameters are now blocked. In order to be able to make
changes to the grid parameters, from now on you must log in using the SMA
Grid Guard code.
9005
Changing of grid parameters not possible > Ensure DC supply
This error can have the following causes:
• The parameters to be changed are protected.
• The DC voltage at the DC input is not sufficient to run the main CPU.
Corrective measures:
• Enter the SMA Grid Guard code.
• Ensure that at least the DC start voltage is available (green LED is
flashing, pulsing or glowing).