SMA 600-US - Manual (Page 37)

SMA America, LLC 6 Electrical Connection
Installation Manual CU600-1000US-IA-en-10 37
Procedure:
1. Establish the DC voltage supply.
2. Press the button for reverse polarity detection once.
☑ The middle LED glows green for a few seconds.
All DC cables are correctly connected. How long the LED glows depends on the level of the
applied DC voltage.
✖ The left LED glows red for a few seconds? How long the LED glows depends on the level of
the applied DC voltage.
At least two of the connected cables at INPUT B are connected with reversed polarity.
• Check polarity and connect the cable to the correct terminal.
✖ The red LED glows red for a few seconds? How long the LED glows depends on the level of
the applied DC voltage.
At least two of the connected cables at INPUT B are connected with reversed polarity.
• Check polarity and connect the cable to the correct terminal.
✖ All LEDs are off?
The polarity test could not be carried out.
• Make sure that the DC voltage ist at least 100 V and wait for about 1 minute. Then press
the button again.
• If there is sufficient DC voltage and the problem still persists, check the polarity at each
terminal with a suitable multimeter. In case of reverse polarity, connect the respective
cable to the correct terminal.