Why is "MMC/SD operation failed!" shown on the display?
An action with the SD memory card has failed.
• Use a computer to ensure that the SD memory card is free of errors.
• Ensure that the data cable between the Sunny Remote Control and the Sunny Island is undamaged and that the
plugs are firmly inserted into the pin connectors.
Why is the display showing "WRONG FILE SYSTEM"?
The SD memory card is not formatted with the FAT-16 or FAT-32 file system.
10.6.3 Questions Regarding the Battery
What happens if a battery is defective?
• Remove the defective battery cell from the battery system. This reduces the rated voltage of the battery by the
voltage of the battery cell.
• In the QCG, set the current rated voltage of the battery under
New Battery
(see Section 11.8 "Replacing the
Why is the SOC of the battery not 100% after completion of full charge?
The power requirements of the loads might have been so high before completion of the full charge that the battery
could not be charged to 100 percent.
• If necessary, select the parameter
222.03 AptTmFul
and set to a longer time period.
Why is the battery discharging even though the generator is running?
The Sunny Island may not have connected to the generator.
• Eliminate the cause (see Section 10.6.4 "Questions Regarding the Generator", page 87).
The power of the loads might exceed the power of the generator.
What do you need to do after replacing a battery current sensor?
• Calibrate the battery current sensor (see the Commissioning section in the Sunny Island inverter installation
manual).
10.6.4 Questions Regarding the Generator
Why is the Sunny Island not connecting to the running generator?
A high output power of the Sunny Island inverter when the battery state of charge is low may lead to the Sunny Island
not being able to raise the AC voltage in the stand-alone grid to the AC voltage of the generator. The Sunny Island
cancels the synchronization.
• To charge the battery, reduce the power of the loads.
The generator voltage might not be within the thresholds for voltage and frequency.
• Check whether the symbol is displayed permanently in standard mode.
If the symbol is not displayed, ensure that the fuse is not defective or the circuit breaker is activated.
If the symbol is not displayed permanently, the generator voltage is sporadically outside the thresholds.
10 Troubleshooting
SMA Solar Technology AG
Operating Manual
87
SI30M-44M-60H-80H-BE-en-33
Summary of Contents for SUNNY ISLAND 3.0M
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