SMA SUNNY ISLAND 6048-US - Page 220

20 Troubleshooting SMA America, LLC
220 SI4548_6048-US-TB_en-13 Technical description
What can I do when "MMC operation failed" appears on the display?
• You wanted to perform an action using the SD card, but it failed (see Section 10.9 "Display of
Warnings and Failures", page 92). Check the card (on your PC/laptop) and use a new
SD card, if necessary.
Why does my Sunny Island stay on even though I switched the DC circuit breaker
to "Off"?
• Your Sunny Island may be powered by the AC side. Switch off all AC loads and disconnect
them from the Sunny Island (see Section 9.4 "Disconnecting the Device from Voltage Sources",
page 75).
Why is my battery discharging even though the generator is running?
• The power produced by the generator does not reach the Sunny Island. Check the voltage and
frequency values. The fuses on the generator may have been tripped.
• The load power exceeds the generator power "234.03 GnCurNom".
– Check the error messages. Find the cause.
Why is the deactivation defined by the SOC in case of a full or equalization
charge and generator start in the second time zone?
• The equalization charge has a higher priority than silent time.
Why is the SOC not at 100%, even after completion of a full charge?
• 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?
• Recalibrate 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: five
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.
for 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 97).