SMA S Technical Description page 161

SMA Solar Technology AG
Why does the "VAC-Low" error (output voltage too low) also occur when the Sunny
Backup 2200 is started?
• A permanent short circuit exists in the consumer grid. Check the AC output connections
(X3 / Backup-Loads).
• The loads connected during the grid failure are too heavy. The power of the Sunny Backup
2200 is not sufficient to supply the loads. Switch off some of the loads and restart the Sunny
Backup 2200.
What happens when "MMC operation failed" appears on the display?
You wanted to perform an action using the MMC/SD card, but it failed (see section
12.1.5 „Selecting Warnings and Errors" (104)). Check the card (on your PC/laptop) and use a new
MMC/SD card, if necessary.
Why is the SOC not at 100 %, even after completion of a full charge?
Set a longer absorption period.
What do I have to do if the Sunny Backup 2200 continuously goes out after Low Battery
Mode (LBM) when restarting the device?
Upon reactivation, ensure that either the public grid is available again, or that battery charging is
possible via the PV system. Otherwise, after 5 minutes without a charging current, the Sunny Backup
2200 returns to battery preservation mode, and switches back to standby.
What happens if the card inserted is not FAT16-formatted?
The Sunny Remote Control 1 displays the message "Incomp". Format the card.
Technical Description
Troubleshooting/Problem Solving
SBU2200-TEN083320 161