Introducing the FTB-2/FTB-2 Pro and FTB-4 Pro
FTB-2/FTB-2 Pro and FTB-4 Pro 15
LED Indicators Description
(when unit is not
connected to an
external power
source)
Off The global level of the batteries is
above the “low-battery threshold”.
Yellow The global level of batteries is low.
Yellow, blinking The unit and its modules would be
using more power than what is
available from the batteries. Connect
AC power as soon as possible.
Red, blinking The detected temperature is too high.
This could lead to a thermal shutdown
of the unit if no action is taken to
reduce the temperature.
LED Status Meaning
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