SMA SB 3000TL-20 Installation - Manual (Page 59)

SMA Solar Technology AG Commissioning
Installation Guide SB30TL_40TL_50TL-IA-IEN120231 59
Minimum Frequency
After the maximum frequency test, the minimum frequency
test takes place and the inverter shows the adjacent
display message for 5 seconds.
During the test sequence, the frequency limit applied is
shown in the display of the inverter. The frequency limit is
increased successively until the shutdown threshold is
reached and the inverter disconnects from the grid.
Once the inverter has disconnected from the grid, the display successively shows the following values,
each for 10 seconds:
• Disconnection value,
• Calibration value,
• Reaction time.
The change between the first and second display takes places every 2.5 seconds.
6.3.3 Interruption of the Self-Test
If, during the self-test, an unexpected disconnection requirement occurs, the self-test is interrupted. The
same applies if the DC voltage is so low that the feed-in can not be continued.
• The inverter then shows the adjacent display
message for 10 seconds.
• Restart the self-test as described in the following
section 6.3.4 ”Restarting the Self-Test” (page 59).
6.3.4 Restarting the Self-Test
In order to restart the self-test, proceed as follows:
1. Disconnect the line circuit breaker and secure against re-connection.
2. If it is connected, disconnect the multi-function relay power supply.
3. Disconnect the Electronic Solar Switch from the inverter for 5 minutes and then connect it again.
☑ The inverter is now in the initialization phase and you can restart the self-test, as described in
section 6.3.1 ”Starting the Self-Test” (page 55) from step 3.