Nevion VikinX Sublime series Rev.G - Manual (Page 23)

VikinX Sublime Optical Routers Rev. G
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4.4 SL-PWR-300 LEDs
There are 2 LEDs on the front of each SL-PWR-300 module, and they indicate the
following:
Upper, RED LED: Normally OFF. If it is ON, there is a power supply failure,
indicating that the power supply module must be replaced.
Lower, GREEN LED: Normally ON. If it is OFF, there is no mains power supplying the
frame.