SMA SI 4548-US - Manual (Page 220)

20 Troubleshooting SMA America, LLC
220 SI4548-6048-US-BE-en-20 Operating Manual
What can I do when the battery cell of a lead-acid battery can no longer be used?
• Remove the cell that can no longer be used from your battery bank. Start the Sunny Island and
change the battery voltage in the QCG under "New Battery".
What can I do when the QCG does not run?
• Switch off the Sunny Island (see Section 9.3 "Switching Off", page 75) and restart it (see
Section 9.1 "Switching On", page 74).
What can I do when "MMC operation failed" appears on the display?
• You wanted to perform an action using the SD memory card, but it failed (see Section 10.9
"Display of Warnings and Failures", page 92). Check the card (on your PC/laptop). If
necessary, use a new SD memory card.
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 100% after completion of 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 parameter "225.04 BatCurAutoCal" 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 warm-up times: five minutes
without charging current in BatProtMode can cause the device to change to standby mode.