Power Source A And B (Pwr); Power On (Vcc) - TC Communications TC1920 User Manual

Chapter 5 Troubleshooting
5.4.1.2

Power Source A and B (PWR)

Power modules A and B are continuously monitored.
The system uses both power supplies simultaneously,
and in the event of the loss of one power supply, will
continue to operate on the other power supply.
PWR LED Behaviors
LED
Solid
Off
5.4.1.3

Power On (Vcc)

The Vcc LED indicates the unit is receiving enough
voltage for proper operation.
Vcc LED Behavior
LED
Solid
Off
5.4.1.4 Ready (RDY)
The RDY LED indicates when the unit has finished
initialization and is operating properly.
RDY LED Behavior
LED
Solid
Fast Flash
Slow Flash
TC1920 Rev 1.3 User Manual
Condition
Power is being supplied from module.
Power is not being supplied from module.
Power module has failed.
Fuse on card has burned.
Condition
5 VDC is good.
No 5 VDC is supplied.
Condition
Unit is ready for use.
Flash operation in progress.
Do not power off unit until operations have completed.
Unit is booting.
Electrical
5-6