10 Troubleshooting
SMA Solar Technology AG
62
SI80H-BE-BEN120810
Operating Manual
What do you need to do after replacing a battery current sensor?
• If you are a skilled person, calibrate the battery current sensor (see the installation manual
of the off-grid inverter for commissioning instructions).
10.5.5 Questions on Cluster Systems and Multicluster Systems
Extension clusters remain in standby mode, although 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.
Why is the Multicluster system not supplying full power?
An extension cluster or individual off-grid inverters of an extension cluster might have failed.
In the Multicluster system, high powers are passed back and forth between the
clusters?
The state of charge of the batteries might differ temporarily. The off-grid system equalises
different states of charge automatically.
The nominal frequencies and nominal voltages might 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.
• If you are a skilled person, distribute the battery capacities to the clusters as evenly as
possible.
Individual battery cells of a battery might have failed.
• If you are a skilled person, disconnect defective battery cells and set the new rated voltage
and capacity (see Section 9.8 "Replacing the Battery", page 52).
