V 12 Mechanical Functions
4 - 10 V Series Operating Instructions
4.2.7 Module Indicator Lights
Whenever a module is inserted into a powered integrated V Hub or an external V Hub, the module 
indicator lights illuminate to designate the status of the module. 
INDICATOR LIGHT COLOR STATUS
No light No communication, VPS disconnected 
Amber Power on but module is not communicating
Green Power on and module is communicating