SMA S Technical Description page 160

Troubleshooting/Problem Solving
Why is my battery discharging, even though the grid is available?
The Sunny Backup system limits the power drawn from the grid to the defined maximum grid current
(parameter "232.03 GdCurNom"). If the total current of all loads exceeds this value, the loads are
supplied with additional power from the battery. If possible, increase the grid current value.
Why is it not possible to change the parameters?
• Has the installer password been entered correctly? Check whether you are actually in "Installer
Level" (see section 12.2.2 „Setting the Installer Password" (106)). If necessary, repeat the
calculation and entry of the password.
• You are in the "100-Meters" (measuring data) menu or the "300-Diagnosis" (Diagnosis) menu.
You can only read the data values shown here.
• Some parameters can only be changed in standby mode or in the QCG (see e.g. the "242.07
GnStrMod" parameter in section 20.2 „Adjustable System Parameters" (142)). Stop the Sunny
Backup 2200 as described in section 11.2 „Stopping" (93). Note that this causes the PV
system to fail, and grid feeding is not possible.
Why is the stand-alone grid frequency not at 50 Hz?
• The Sunny Boy inverter is controlled via the frequency (see section 18.2 „Frequency Shift
Power Control (FSPC)" (135)).
• Power fluctuations cause frequency deviations.
4. Fault
Why is the Sunny Backup System S not starting?
• Check whether there is a galvanic connection between the N conductors between the X2/PV
system connections terminals and the X4/backup loads of the Automatic Switch Box S. Remove
this bridge, if necessary, and restart the system.
Why is the device display of the Sunny Backup 2200 dark? Why are none of the LEDs
illuminated?
• Was the BatFuse A.01 tripped?
The Sunny Backup 2200 is therefore disconnected from the battery and switched off. Replace
DC fuses.
• Is the BatFuse A.01 inserted and functioning properly?
In this case, the device has switched off to protect the battery against deep discharge (see also
section 16.3 „State of Charge/SOC and SOH" (124)). For information on restarting the Sunny
Backup 2200, see section 11.5 „Reactivating the Device Following Automatic Shutdown"
(96).
160 SBU2200-TEN083320
SMA Solar Technology AG
Technical Description