FMB640 LED status

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This section is an explanation of LED indications on an FMB640 device.

Navigation LED Indications

Behaviour Meaning
Permanently switched on GNSS signal is not received
Blinking every second Normal mode, GNSS is working
Off GNSS is turned off because:
Device is not working
or
Device is in sleep mode
Blinking fast constantly Device firmware is being flashed

Status LED Indications

Behaviour Meaning
Blinking every second Normal mode
Blinking every two seconds Sleep mode
Blinking fast for a short time Modem activity
Off Device is not working
or
Device is in boot mode