SMA Sunny Island 2012 Technical Description page 193

Stand-alone grid inverter
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SMA Solar Technology AG
What happens if battery cell becomes useless?
Remove the unusable cell from your battery bank. Start the Sunny Island and change the
battery voltage in the QCG under "New Battery".
What can I do if the QCG does not start?
Switch off the Sunny Island (see section 10.1.3 "Switching Off" (Page 87)) and restart it (see
section 10.1.1 "Switching On/Starting" (Page 83)).
What happens when "MMC operation failed" is displayed?
You wanted to perform an action using the MMC/SD card, but it failed (see section 10.2.6
"Selecting Warnings and Faults" (Page 100)). Check the card (on your PC/laptop) and use
a new MMC/SD card, if necessary.
Format the MMC/SD card using FAT16.
Why is the 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. It is possible that the generator fuses have been triggered.
The energy produced by the generator is not enough to supply the consumers. The generator
and the battery supply the consumers.
Why is the deactivation defined by the SOC in case of a full or equalization charge and
generator start in the second time zone?
Equalization charge has a higher priority than silent time.
Why is the SOC not at 100 % even after full charging has been completed?
Define a longer period of time of absorption.
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" (see chapter9.3 "Commissioning the Battery Current Sensor" (Page 81)).
This parameter can only be changed by the installer, using the installer password.
What is required if the Sunny Island is continuously switches 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 differen parameter sets on the MMC/SD card and activate them via the "550.02
ParaLod" parameter (see section 10.4.3 "Loading and Saving Parameters" (Page 112).
Technical Description
Troubleshooting/Problem Solving
SI2012_2224-TEN082311
193

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