Frequently Asked Questions (Faqs); Questions Regarding The Sunny Island - SMA SUNNY ISLAND 4.4M Operating Manual

14 Troubleshooting
2. Set Reset operating data to Reset operation inhibition.
3. Start the system (see Section 9.2, page 118).
14.5

Frequently Asked Questions (FAQs)

14.5.1 Questions Regarding the Sunny Island
Why is the Sunny Island not switching off even though I have opened the load-break switch of
the battery fuse?
The Sunny Island may still be supplied from the AC side.
• Switch off all AC sources and disconnect them from the Sunny Island.
Why is the Sunny Island not switching to energy-saving mode?
Another function might have a higher priority than energy saving mode, e.g., equalization charge or full charge (see
Section 7.6.7, page 85).
After automatic disconnection in battery protection mode, the Sunny Island can no longer be
started?
• Charge the battery only when the Sunny Island cannot be switched on (see Section 13.6.2, page 131).
– Switch off all loads.
– If there is a generator in the system, start the generator manually. When doing so, observe the warm-up time
of the generator. 5 minutes without charge current can result in disconnection of the Sunny Island inverter.
– If sufficient power is available from the generator or the AC sources in the stand-alone grid, e.g., sufficient
solar irradiation for PV inverters, switch the Sunny Island on. AC sources in the stand-alone grid can start
feeding in electric current only once the Sunny Island has been started and is in operation.
An IPC error is displayed during a firmware update?
• The display of an IPC error during a firmware update is normal (IPC - Internal Process Communication). The
processors cannot communicate with each other during the firmware update.
How can the Modbus interface be tested on Sunny Island?
• Test the function of the Modbus interface with a Modbus program. Query simple registers (e.g. serial number).
Tip: Record the settings in the Modbus program and the queried registers (e.g. with screenshots). The Service
requires this information in order to be able to help you in a targeted matter.
For which operating modes is current-controlled generator operation (I-loop) useful?
When current-controlled generator operation is running and when the Sunny Island system is synchronized with the
external source, the Sunny Island pulses with AC voltage
• In systems with Multicluster-Box, current-controlled generator operation is not possible.
• The Sunny Island 4.4M always operates in im current-controlled generator operation mode.
• With the Sunny Island 6.0H and the Sunny Island 8.0H, current-controlled generator operation mode with
generator and utility grid is possible.
168 SI44M-80H-13-BE-en-15
SMA Solar Technology AG
Operating manual