SMA SI 3.0-11 - Manual (Page 71)

SMA Solar Technology AG 9 Troubleshooting
Operating Manual SI30M-44M-60H-80H-BE-en-30 71
The Sunny Island only connects to the generator for a short time?
The generator may be overloaded.
• Select the parameter 234.03 GnCurNom and set it to 75% of the rated current of the generator.
• If possible, reduce the power of the loads.
The maximum permissible generator voltage may be set too low.
•
Select the parameter 234.02 GnVtgMax and set to the maximum generator voltage.
The minimum frequency for the generator voltage may be set too high.
•
Select the parameter 234.05 GnFrqMin and set to the minimum frequency of the generator voltage.
The permitted time 234.14 GnRvTm for reverse power might have been exceeded.
• Check whether warning W401 is registered in the menu 420# Error history. Tip: If a warning was registered,
the warning symbol " " is shown in the standard mode of the Sunny Remote Control.
• Select the 540.02 GnAck parameter and set to Ackn. This acknowledges the generator error.
The Sunny Island does not reconnect to the generator after a disconnection from the generator due
to noncompliance with the thresholds for voltage and frequency?
The Sunny Island is switched with a hysteresis, i.e., the thresholds for connection do not correspond to the thresholds
for disconnection.
• To unload the generator, disconnect unnecessary loads.
• Wait until the voltage and frequency have reached the nominal values.
9.5.5 Questions Regarding Multicluster Systems
Extension clusters remain in standby mode even though the main cluster is in inverter mode?
The data cable between the masters of the individual clusters might not be connected. The master of the main cluster
cannot forward the "Start" command to the masters of the extension clusters.
The multicluster system is not supplying full power?
An extension cluster or individual Sunny Island inverters of an extension cluster might have failed.
High levels of energy are transferred between the clusters in the multicluster system?
The state of charge of the batteries might differ temporarily. The off-grid system equalizes different states of charge
automatically.
The nominal frequencies and nominal voltages may be defined differently.
• Set the frequencies and voltages in the 210# Inverter Settings menu to the same values for all masters.
The battery capacities might differ significantly.
•
Distribute the battery capacities to the clusters as evenly as possible.
Individual battery cells of a battery might have failed.
•
Disconnect defective battery cells and set the new rated voltage and capacity (see Section 10.8 "Replacing the
Battery", page 78).