User Manual

indicated by beeping through the motor and LED flashing. There are four main beep pitches:
Beep 1: Lowest pitch (also red LED).
Beep 2: Medium-low pitch (also green LED).
Beep 3: Medium-high pitch (no LEDs)
Beep 4: Highest pitch (also red and green LEDs together).
Beeps 1, 2, and 3: Normal power-up with no special event detected. A longer beep 4 normally
follows to indicate that an arming signal was detected.
Beep 3, beep 1: Voltage brown-out detected (MCU voltage dropped below 4.0V). If this happens
during battery connection, it can be safely ignored. If this happens during use, the ESC may have
drawn more than the power source is able to provide, and the input voltage dropped below about
5V.
Beep 4: External reset. Should only occur after programming.
Repeating beeps 1, 1, 3, 3: Watchdog siren. Previous execution locked up or was not able to signal
proper status, so to prevent motor or other damage, the ESC reset itself. Check for moisture
problems or strong fields right next to the ESC. If nothing is found, the MCU may be faulty.
Once a valid input is connected and the ESC is sees an idle power request, a long beep 4 is played
and the green LED lit to indicate that the ESC is armed. This is required for all input sources, and
must be maintained at a rate of at least 20Hz, or power will be switched off. If the input signal
stops, the ESC will disarm after 2 seconds and play beeps 3 and 2 to indicate that the input
disappeared. The ESC will look again for valid input sources, or programming input via the Turnigy
USB linker.
If no input is detected for more than 8 seconds, a periodic beep 3 every 3 seconds will be emitted
(beacon mode). This may aid in the location of a crash, assuming the signal is lost.