Victron energy Venus GX Manual page 7

This uses Universal plug-and-play broadcast technology.
3. LEDs and Push-button
3.1 LEDs
Boot-up
On the side of the Venus GX, there is a LED. During power-up it it goes through these states:
Stage 1: Both green and red illuminate briefly and faintly (it's hard to see the green) for
approximately 1 second.
Stage 2: Red illuminates for approximately 1 second.
Stage 3: Green illuminates for approximately 0.5 seconds.
Stage 4: Both green and red illuminate briefly and faintly (it's hard to see the green) for
approximately 1 second.
During operation
Slow blinking: built-in WiFi access point disabled
Fast blinking: built-in WiFi access point enabled (default)
Slow blinking is once per second. Fast blinking is twice per second.
Venus GX (VGX) manual