SMA 20000TL Service Manual - Manual (Page 21)

Event number Message, cause and corrective measures
9003 Grid parameter locked
The parameters are now locked. You cannot change the parameters.
Corrective measures:
• Unlock the parameters with the SMA Grid Guard code.
9005 Changing of grid parameters not possible > Ensure DC supply.
PV power is too low for setting the country data set. As soon as sufficient irra-
diation is available, the inverter assumes the setting automatically.
5 Troubleshooting SMA Solar Technology AG
Service Manual for Installers 21 STP20-25TL-SG-en-11