Advanced Setup
Further details of the F-Series ESC setup including recommended prop/motor combination, tuning, firmware updates, and audible tones.



Regular checks and maintenance should be performed on the ESCs, especially after crashes. This includes:
  • Inspect for any broken or chipped components on both the top and bottom sides.
  • Power on using a smoke stopper or low-voltage battery to ensure electronics are not damaged or getting hot quickly.
  • The no-load current draw of the 120A ESC is 40mA. This can easily be checked by de-soldering the ESC from any PDB or wiring harness, and powering on using a 3S Li-Po. If the ESC draws less than 35mA or more than 45mA, there is a damaged component on the board.
  • Capacitors that are swelling or bulging should be replaced immediately. Excessive heat and high-current loads will reduce the capacitor's life.

Protection Mechanisms

The F-Series ESCs contain the following factory configured protection mechanisms to ensure maximum product lifetime:
Phase Current Limiting
The motor phase current is limited to the maximum burst rating for each F-Series ESC. These are as follows:
  • 40F3 ESC: 100A Limit
  • 100F3 ESC: 180A Limit
  • 120F3 ESC: 200A Limit
  • 200F3 ESC: 300A Limit
Over Temperature Protection
All ESCs are set to 110°C, at which point the maximum throttle is limited to a 50% duty cycle.
Over Voltage Protection
All ESCs will reduce regenerative braking response when a voltage rise is detected on the bus while braking.

Motor and Prop Size

Correct motor and propeller selection is very important to reduce the load on the ESC and to reduce motor saturation. Incompatible combinations can result in reduced overall performance, reduced system lifetimes due to excess heat and even ESCs burning out. If the prop and motor combination draw more than the ESC's nominal current rating at a static load, they are not recommended. For reference, a system running a 120F3 and a MAS 13x12x3 propeller should have the following motor Kv:
Cell Count
Recommended Kv
In order to use larger propellers, either the motor Kv or battery cell count should be reduced.


For tuning the flight controller with BetaFlight, we recommend the MPU6000 series accelerometers. ICM gyros are low-power and more susceptible to noise.
PID Tips
If increasing frame size by X%, then increase your P-value by X%.
If increasing prop size or rpm by X%, then reduce your P-value by X%. Start with a lower I and D value, and gradually increase them.


On larger frames filters play a large role in the effectiveness of PID set-points. The lower the filter values, the better the system performs.
The ESCs update loop-time is much higher than the frequency of the vibrations that pass through the arms of larger machines. As a result, the vibrations will be equally seen at the flight controller as they are at the motors, resulting in the need to filter them out.

Firmware Updates

Firmware updates and tools can be found under the Firmware Installation Section.


Once the ESC is connected to a motor and powered on, the following sequences of tones give status and errors as they occur. The tones occur in either high or low beeps, with a varying frequency.
Number of Tones
Repeat Frequency
1 beep
3 secs
Waiting for signal tone, lower pitch
1 beep
10 secs
Idle ESC tone, higher pitch
1 beep
After commanding motor start
Stall Protection engaged tone
2 beeps
3 secs
Invalid signal tone
3 beeps
10 secs
Bad signal quality tone
3 beeps
Only occurs once
Booting to config mode tone
3 beeps
Only occurs once
DShot protocol tone
3 beeps
5 secs
Over-temperature tone
4 beeps
Only occurs once
Bi-Directional DShot protocol tone
5 beeps
Only occurs once
Proshot protocol tone
5 beeps
Only occurs once
PWM protocol tone
6 beeps
3 secs
Non-Zero Signal on Start tone

Waiting for Signal Tone

Indicates the ESC has not yet detected a valid or invalid signal on the input port. This can indicate wiring is not properly connected, or the signal source isn't outputting.
Waiting for signal tone, 1 beep

Idle ESC Tone

ESC has successfully armed and is now waiting for a throttle raise to begin output drive to the motor. This beep can be specifically disabled on its own.
Idle ESC tone, 1 beep

Stall Protection Tone

The ESC has attempted to start the motor but was unable to. Check that the motor spins freely. You may have to apply high starting throttle to overcome the starting torque of the motor.

Invalid Signal Detected Tone

The ESC has not been able to recognise the signal input type, or it is a signal that is not supported. Check the output type on the signal source, and take steps to ensure noise is kept to a minimum.
Invalid signal detected tone, 2 beeps

Bad Signal Quality Tone

Excess noise was detected during the last drive period. This indicates measures should be taken to improve signal quality, such as a different protocol or twisting ground-signal cables.
Bad signal quality tone, 3 beeps

Booting to Config Mode Tone

The ESC is booting into config mode over a passthrough connection, allowing for access to the settings through the configuration tool.
Booting to config mode tone, 3 beeps

DShot Protocol Tone

DShot protocol has been successfully detected on the input, ESC ready to drive.
DShot protocol tone, 3 beeps

Over-temperature Tone

An over-temperature shutdown has occurred as the unit surpassed the temperature limit, the ESC will need to be restarted to resume operation. Take steps to improve cooling over the units.
Over-temperature tone, 3 beeps

Bi-Directional DShot Protocol Tone

Bi-Directional DShot protocol has been successfully detected on the input, ESC ready to drive.
Bi-directional DShot protocol tone, 4 beeps

Proshot Protocol Tone

ProShot protocol has been successfully detected on the input, ESC ready to drive.
Proshot protocol tone, 5 beeps

PWM Protocol Tone

PWM protocol has been successfully detected on the input, ESC ready to drive.
PWM protocol tone, 5 beeps

Non-Zero Signal on Start Tone

ESC was initialised with non-zero throttle command. Reset throttle to zero and power cycle the ESC.
As always, reach out if there's any issues or questions, we try to respond as soon as we can. Contact options can be found under Help.