SMA SI 3324 - Manual (Page 59)

SMA Technologie AG Troubleshooting/Problem Solving
User Manual SI3324/4248-14:FE2406 Page 59
- The generator reverse power has been exceeded. A "!" is shown in the
display. Set the "24-3 GenOperation" parameter to "Release" (see page 33),
the Sunny Island 3324/4248 will switch to the generator.
3. The DC circuit breaker on the Sunny Island 3324/4248 is set to "On" but the
display remains dark.
- The inverter has switched off to protect the batteries from deep discharge (see
also section 6.3 "Deep Discharge Protection / Battery State" (page 39)). To
restart the Sunny Island 3324/4248, see section 4.2.4 "Restarting the
Automatic Shutdown" (page 22).
4. The Sunny Island 3324/4248 only briefly switches to the generator and
constantly changes from battery charging mode (Charge mode) to inverter
mode (Invert mode).
- The "24-2 AmpacGenMax" parameter (see section 5.2.2 "Setting the Output
Current Limit" (page 32)) is too high. Set the "24-2 AmpacGenMax"
parameter to a value that is 85 % of the nominal generator current.
- The limits for the maximum permissible AC voltage or the minimum permissible
frequency of the generator are too strict. Increase the limits for voltage and/
or frequency according to the technical data of your generator.
5. The stand-alone grid frequency is not 50 Hz.
- The Sunny Boy inverter is controlled via the frequency (see section 7
"Frequency Shift Power Control (FSPC)" (page 41)).
- The "AFRA" function of the Sunny Island 3324/4248 is activated (see the
Sunny Island 3324/4248 user manual, section "Automatic Frequency
Adjustment").
6. The "VAC-Low" fault (output voltage too low) occurs when the Sunny Island
3324/4248 is started.
- A short-circuit exists in the stand-alone grid. Check the AC output connections
of the stand-alone grid.
- The loads connected to the stand-alone grid are too heavy. The power/
electrical energy of the Sunny Island 3324/4248 is not sufficient to supply the
loads. Switch of some of the loads and restart the Sunny Island 3324/4248.