SMA America, LLC
Troubleshooting
Technical Description
SI5048U-TUS121440
211
Why is the SOC not at 100 % even after full charging has been completed?
• Set a longer absorption period.
How is it possible to ensure that the maximum battery charging current is
correctly calculated after a reinstallation of the battery current sensor?
• Re-calibrate the battery current sensor using the ”225.04 BatCurAutoCal” parameter with the
setting ”Start”.
What is required if the Sunny Island is continuously switched off after Low Battery
Mode (LBM) when restarting the device?
• Start the generator manually, if required (e.g.: Run1h). Consider the time for warming up:
5 minutes without charging current in BatProtMode can cause the device to change to standby
mode.
How is it possible to change between wintertime and summertime operation e.g.
in case of alpine huts?
• Save two different parameter sets on the SD card and activate them via the ”550.02 ParaLod”
parameter (see section 11.3 ”Saving and Loading Parameters” (page 96).
What happens if the card inserted is not FAT16 formatted?
• The Sunny Island displays the message ”Incomp”.
Why does the generator and/or the grid not reconnect although the (voltage or
frequency) limit for disconnection has not been exceeded?
• The Sunny Island connects with a so-called hysteresis, i.e., the connection value is slightly below
or above the disconnection value. These threshold values are predefined ex-works.
Why is it not possible to set any combinations of voltage and frequency limits?
• The possible ranges for voltage and frequency of the Sunny Island allow the combination of
special frequencies and voltages that result in transformer saturation and are therefore not
permitted.
Why is it that one (or more) extension clusters remain in standby, although the
main cluster is operating properly?
• Is the communication cable between the master devices connected? The main master cannot
forward the ”Start” command to the extension master. The devices remain in standby.
Why is the Multicluster system not supplying full power output?
• Has an extension cluster's slave failed? The system continues to operate, but with
correspondingly lower output on the phase of the failed device.
Why is it that shortly after startup, the slave switches to standby with the failure
message F117, but the master continues to operate?
• Are the phases within the cluster, or from the cluster to the Multicluster Box connected the wrong
way around? This causes a permanent short-circuit in the cluster, and the slave reports this to the
master.
