AFM 4-2
Appendix I
ESC Beep Codes
ESC beeps notify status and/or errors of the propulsion system. The ESC code table is reproduced from
page two of the Castle Edge Manual (P/N: 095-0176-00 revised 03/2013).
As of 2017, inserting the throttle safety key will cause to motor to emit a disarm tone.
(*) Repents a short beep (–) represents a long beep
Tone
Meaning
Description
“Castle Power”
tune with beeps
corresponding to
number of cells
Power up notice
ESC plays Castle signature tone and beeps out the number of cells
attached to controller. Note: when Auto-LiPo detection is disabled
by the user, ESC will not beep the number of cells. ESC will not run
motor until it receives an arming signal from the radio via the
throttle lead
Arming Tone
ESC ready to run
motor
ESC plays the Castle arming tune once it receives a signal from the
receiver. Controller is ready to run the motor at this point.
*
Powered ESC
notice
ESC beeps motor every 10 seconds to remind user that power is
connected to the ESC. This notice may be disabled in Castle Link.
*-
Low Voltage
Cutoff
Main battery voltage dropped below the cutoff value. The default is
Auto-LiPo which sets the cutoff value based on the detected cell
count. Other settings may be entered in Castle Link
*-*
Over
Temperature
ESC reached an overtemp condition. Occurs when operated under
too high a load or operated without proper cooling airflow
*--
Excessive Load
ESC detected very high current spikes. Causes may include
damaged wiring leading to, or inside, the motor, or the use of too
large a motor for the controller.
Remove power from the controller and check for shorts. If none are
found, verify the controller can handle the motor’s current load. As a
safety feature, if multiple Excessive Load errors are detected,
beeping will be disabled.
**
Start Fail
ESC was unable to start motor
**-
Radio Glitch
ESC detected unusual signals or loss of signal on throttle wire.
***
Motor Anomaly
ESC detected a sudden interruption of the motor’s rotation.
-*
Over-Current
ESC detected operating currents that exceed the cutoff value.
-**
AUX Wire Glitch
ESC detected unusual signals or loss of signal on the AUX line.
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