SMA SUNNY ISLAND 4.4M Operating Manual page 148

14 Troubleshooting
Event number Message, cause and corrective measures
1710
Stand-alone grid
Voltage at terminal AC1 of the Sunny Island at line conductor Lxx is too low due to AC
sources in the system.
Corrective measures:
1711
Stand-alone grid
The Sunny Island at line conductor Lxx has measured an undesired voltage at terminal AC1.
Corrective measures:
A bypass switch may have bridged the internal transfer relay.
1712
Stand-alone grid
With open tie switch, AC voltage is applied at line conductor Lxx.
Corrective measures:
1713
System failure
The line conductor of a Sunny Island is missing.
Corrective measures:
148 SI44M-80H-13-BE-en-15
• 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.
An external energy source (e.g., generator) may have been connected to the
connection AC1.
• 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.
• Ensure that all miniature circuit breakers of the Sunny Island inverters in the Multicluster-
Box are closed.
• Search for the missing line conductor and eliminate the error. To identify the missing line
conductor, measure the AC voltage between each line conductor and between the line
conductors and the neutral conductors with the loads connected. If an AC voltage
deviates from the nominal voltage by ±10%, the corresponding line conductor is
missing.
• Reset the off-grid system. For this, disconnect the off-grid system and restart.
SMA Solar Technology AG
Operating manual