SMA STP 12000TL-US - Manual (Page 54)

Event number Message, cause and corrective measures
29001 Grid Guard code valid
The entered SMA Grid Guard code is valid. Protected parameters have now
been unlocked and you can adjust the parameters. The parameters will be au-
tomatically locked again after ten feed-in hours.
29004 Grid param. unchanged
Changing the grid parameters is not possible.
10.3 Cleaning the Fans
10.3.1 Cleaning the Fan at the Bottom
First clean the fan at the bottom of the inverter and then clean the fan on the left-hand side of the
enclosure.
Procedure:
1.
Danger to life due to electric shock
• Disconnect the inverter from all voltage sources (see Section 9 "Disconnecting the Inverter
from Voltage Sources", page 41).
2. Wait for the fan to stop rotating.
3. Remove the fan guard and clean it:
• Use a screwdriver to push the two locking
tabs at the right-hand edge of the fan guard
to the right-hand side and remove them
from the retainer.
• Carefully remove the fan guard.
• Clean the fan guard with a soft brush, a paint brush, a cloth or compressed air.
4. Press the locking tabs on the fan toward the
center of the fan.
5. Carefully remove the fan from the inverter.
10 Troubleshooting SMA Solar Technology AG
Installation Manual STP12-24TL-US-IA-en-16 54