SMA SI 4548-US - Manual (Page 222)

20 Troubleshooting SMA America, LLC
222 SI4548-6048-US-BE-en-20 Operating Manual
Why is it that high outputs are being transferred back and forth between the
clusters in the cluster network?
• The nominal frequencies and voltages are defined differently. Correct this by means of the
appropriate parameters.
What is the meaning of the F221 error message?
• Error message F221 appears when a battery with external battery management has been
connected to the Sunny Island (e.g. a lithium-ion battery), the Sunny Island, however, is not set
to this battery type. Start the QCG and change the system configuration on the connected
battery type (see Section 8.2 "Starting the Quick Configuration Guide (QCG)", page 68).
20.10 Procedure during Emergency Charge Mode
The Sunny Island cannot provide voltage with full amplitude with a deeply discharged battery and
can no longer synchronize with an existing grid or generator. Using the emergency charge mode
(ECM), it is possible to charge the batteries in current-controlled mode.
To charge the batteries in the emergency charge mode, either bridge the AC1 with AC2 (for a
stationary generator) or connect a portable generator directly to AC1.
All loads must be disconnected in emergency charge mode.
Emergency charge mode is activated in the QCG. Follow the instructions on starting the QCG up to
point 2 (see Section 8.2 "Starting the Quick Configuration Guide (QCG)", page 68). Then start the
emergency charge mode as described in the following
1. Select "Emerg Charge" in QCG with .
Emergency charge mode with lead-acid batteries only
In emergency charge mode, a lead-acid battery must be connected to the Sunny Island.
Emergency charge mode is not possible with lithium-ion batteries.
Battery Management
The battery management is active and the current set battery parameters and the current
charging phase are used. These values can be changed in "normal operation".
Generator and Grid Management
In emergency charge mode, the generator management and grid management are not active.
Reverse power protection and relay protection are also not active.
AC1 and AC2 are bridged
If AC1 and AC2 have been bridged, the generator should first be connected and then started/
started by hand. Otherwise, it is possible that the magnetizing current trips the generator fuse.
(This can also happen when connecting the relay without using a bridge.)