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If the input voltage is not within the regulated range, it will take the voltage as an abnor-
mal 

voltage and then activate the protection, flash Red LED and beep a series of beeps.

2. Start-up Protection

The ESC will monitor the motor speed (RPM) during the start-up process. When the speed
stops increasing or the speed increase is not stable, the ESC will take it as a start-up failure.
At that time, if the throttle amount is less than 15%, the ESC will automatically try to restart
up; if it is larger than 20%, then you need to move the throttle stick back to the bottom
position and then restart up the ESC. (Possible causes of this problem: poor connection/
disconnection between the ESC and motor wires, propellers are blocked, etc.) .

3. ESC Thermal Protection

The ESC will gradually reduce the output but won’t cut it off completely when the ESC
temperature goes above 110. For ensuring the motor can still get some power and won’t
cause crashes, so the maximum reduction is about 50% of the full power. The ESC will
gradually resume its maximum power after the temperature lowers down. In addition, the
ESC temperature cannot exceed 70 when it’s powered on. Otherwise, it cannot be started
up but flashes Blue LED and beeps a series of beeps to indicate the ESC temperature is
too high. (Here we are describing the ESC’s reaction in the “Soft Cutoff” mode, while if in
the “Hard Cutoff” mode; it will immediately cut off the power.) 

4. Throttle Signal Loss Protection

When the ESC detects loss of signal for over 0.25 second, it will cut off the output

immediately to avoid an even greater loss which may be caused by the continuous high-
speed rotation of propeller. The ESC will resume the corresponding output after normal
signals are received. 

5. Overload Protection

The ESC will cut off the power/output and automatically restart itself when the load sudd
-enly increases to a very high value. If the load still remains high or the motor still remains
out of sync, then it will completely cut off the power/output.

6. Low-voltage Cutoff Protection

When the operating voltage goes below the preset cutoff voltage, the ESC will gradually
reduce the output but won’t cut it off completely. For ensuring the motor can still get
sufficient power to land the aircraft safely, so the maximum reduction is about 50% of the
full power. You need to change another fully charged battery to resume the operation
when the low-voltage cutoff protection is activated. 

7. Over-current Protection

During use, the ESC will cut off the output immediately if the current exceeds the regula-

ted 

value and then resume it quickly; the ESC will cutoff the output completely and won’t

resume it if the regulated value is exceeded again. 

If you encounter any problem in use, please contact local distributor or T-MOTOR for techinical support.

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