Status signalling with LEDs and status messages
8-12 Chapter 8: Service & maintenance 99-145912-A
8.4.2 LEDs of the ADU modules
Each ADU module has a Power and a Service LED.
For a list of modules see Removal and replacement of ADU modules
on page 8-15.
8.4.3 LEDs in the ACU
The ACU has 3 LEDs: on the front panel: Power, Logon and Fail/Pass LED.
LED Behaviour Description
Power Steady green Power supply OK
Off No power
Service Steady green Module ok, application running.
Flashing green Waiting for upload
Flashing red/green Uploading software
Steady red Module error or loading error
Table 8-1: LEDs of the ADU modules
LED Behaviour Description
Power Steady green Power supply OK
Steady red Power supply failure
Off No power
Logon Flashing
green
Current status is displayed:
• Searching satellite
• Identifying satellite
• Carrier lock & TX enabled from modem
Steady green Satellite link established
Off No satellite link acquired
Table 8-2: LEDs on the ACU