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Status signalling with LEDs and status messages
7.4.2
LEDs in the ACU
The ACU has 3 LEDs: on the front panel: Power, Logon and Fail/Pass LED.
LED
Power
Logon
Fail/Pass
LED
7.4.3
LEDs of the GMU
The GMU does not have any LEDs on the front plate. You can check the status of the
GMU in the display of the ACU, in the menu Modem. The current status is
communicated by a text string. Each LED can have the status steady green, red or amber,
or flashing green, red or amber.
• NET LED
• STAT LED
• TX LED
• RX1 LED
• RX2 LED
• PWR LED
• TEMP LED
• FAN LED
7-16
Behaviour
Steady green
Power supply OK
Steady red
Power supply failure
Off
No power
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
Steady red
A fault which prevents operation is present
in the system (ACU, ADU, MODEM).
Flashing green A Power On Self Test (POST) or Person
Activated Self Test (PAST) in progress.
The current status is displayed.
Flashing red
Active BITE failure or warning. The event
is shown in the ACU display.
Steady green
No faults.
Table 7-2: LEDs on the ACU
Description
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