SMA Solar Technology AG Commissioning
Installation Guide SB20_25_30HF-IEN102911 55
7.3.2 Test Sequence
Note the values which are displayed during the test sequence. These values must be entered into a
test protocol. The test results of the individual tests are displayed three times one after the other. When
the inverter has carried out the 4 tests, it switches to normal operation. The original calibration values
are reset.
Overvoltage Test
The inverter begins with the overvoltage test and shows
the adjacent display message for 5 seconds.
During the test sequence, the voltage limit applied is
shown in the display of the inverter. The voltage limit is
reduced successively until the shut-down threshold is
achieved 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.
Current Values in the Display
During the self-test the actual voltage, the feed-in current and the frequency is displayed
above the text rows independent of the test values.
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