SMA SUNNY ISLAND 4.4M Operating Manual page 146

15 Troubleshooting
Event number Message, cause and corrective measures
405
Ext grid disconnect due to undesired island grid
Unintended stand-alone grid is present at connection AC2 of the Sunny Island at line conduc-
tor L1 / L2 / L3.
Corrective measures:
Corrective measures for a generator:
Corrective measures for a utility grid:
504 to 505
Grid fault
The frequency of the generator or the utility grid at the Sunny Island is too low or too high.
Corrective measures for a generator:
Corrective measures for a utility grid:
803
Grid fault
The voltage and/or frequency of the generator or the utility grid is/are outside of the config-
ured range.
Corrective measures for a generator:
Corrective measures for a utility grid:
146 SI44M-80H-12-BE-en-10
• Ensure that the insulated wires at connection AC2 are securely connected and that the
conductors in the terminals are free of insulation.
• Control of the contactor via a Sunny Island inverter 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.
• Contact the Service (see Section 19, page 189).
• The generator may be overloaded. Reduce the total power of the loads by staggering
their use over time.
Adjust the thresholds for the generator frequency on the inverter (see Section 7.8.1.3,
page 97). As an aid to this, observe and evaluate the measured values Grid
frequency of external power connection during ongoing operation.
Adjust the frequency of the external energy source.
• Contact the Service (see Section 19, page 189).
• Adjust the thresholds for the frequency and/or voltage of the generator on the
Sunny Island (see Section 7.8.1, page 96). As an aid to this, observe and evaluate the
measured valuesVoltage external power connection and Grid frequency of
external power connection during ongoing operation.
• Adjust the generator voltage and/or generator frequency.
• Contact the Service (see Section 19, page 189).
SMA Solar Technology AG
Operating Manual