NavCom SF-3040 Rev.F - Manual (Page 92)

SF-3040 Product User Guide
– Rev. F
3-90

Batteries are not charged in the unit. If
external power is applied, the battery
LEDs indicate the status of the batteries,
not the status of the external power
source.

Over-temperature Shutdown: The
SF-3040 emits a 5-second warning
beep, and all LEDs turn red to indicate
over- temperature condition and eminent
shutdown. This may be caused by
installed batteries and an internal
temperature exceeding 80°C (typically,
65°C ambient) for 5 seconds or longer.
This action is only to protect the
batteries and will not occur if batteries
are not installed.