ADS Environmental Services ADS TRITON+ QR 775027 A3 - Manual (Page 187)

External Power 5-37
3. Verify that the ON LED is illuminated on the power supply
(when applicable) and that both the ExPAC DC IN and DC
OUT LEDs also are illuminated. For more information on
locating and interpreting the LEDs on the ExPAC, refer to
Chapter 10, Maintenance and Troubleshooting.