SMA SUNNY ISLAND 4.4M Operating Manual page 152

15 Troubleshooting
Event number Message, cause and corrective measures
1709
Stand-alone grid
An underfrequency has occurred at connection AC1 of the Sunny Island.
Corrective measures:
1710
Stand-alone grid
Voltage at terminal AC1 of the Sunny Island is too low due to AC sources in the system.
Corrective measures:
1711
Stand-alone grid
The Sunny Island has measured an undesired voltage at terminal AC1.
Corrective measures:
A bypass switch may have bridged the internal transfer relay.
An external energy source (e.g., generator) may have been connected to the connection
AC1.
1712
Stand-alone grid
When the tie switch is open, AC voltage is present at line conductor L1 / L2 / L3.
Corrective measures:
152 SI44M-80H-12-BE-en-10
• Ensure that the Sunny Island is functional. For this, disconnect all AC sources and loads
from the Sunny Island and restart the Sunny Island.
• Find the cause of the underfrequency through measurement and step-by-step connection
of the AC sources and loads.
• Ensure that the Sunny Island is functional. For this, disconnect all AC sources and loads
from the Sunny Island and restart the Sunny Island.
• Find the cause of the undervoltage through measurement and step-by-step connection of
the AC sources and loads.
• Ensure that the bypass switch is in the position for operation with Sunny Island.
• Disconnect external energy source from connection AC1 and connect to connection
AC2.
• Ensure that the triggering of the tie switch is correct.
• Ensure that the tie switch is correctly wired.
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Operating Manual