14 Troubleshooting
SMA Solar Technology AG
Operating manual
141
SI44M-80H-13-BE-en-15
Event number
Message, cause and corrective measures
204
Grid incident
The voltage of the generator or of the utility grid of the Sunny Island line conductor Lxx is too
low.
Corrective measures for generator:
• Adjust the thresholds for the generator voltage of the Sunny Island (see Sunny Island
technical information "Measured Values and Parameters"). As an aid to this, observe
and evaluate the measured values
Voltage of external grid connection Lxx
during
ongoing operation.
Adjust the generator voltage and/or generator frequency.
Corrective measures in battery-backup system:
• Contact the Service.
301
Rise-in-voltage protection
Rise-in voltage protection of line conductor Lxx
Corrective measures:
• Ensure that the conductor cross-section of the AC cables is correctly sized.
405
External grid disconnection due to undesired electrical island
Unintended stand-alone grid is present at connection
AC2
of the Sunny Island at line conduc-
tor Lxx.
Corrective measures:
• Ensure that the insulated wires at connection
AC2
are securely connected and that the
conductors in the terminals are free of insulation.
Corrective measures for generator:
• Implement control of the contactor via a Sunny Island multifunction relay. To do so, set
the parameter
Operating mode of multifunction relay
to
Automatic generator
request
.
• Set the parameter
Sensitivity of generator failure detection
to a lower sensitivity
level.
Corrective measures for utility grid:
• Contact the Service.
