E-20: Over torque boost

Cause:
E-20 fault typically occurs when [F402] Automatic Torque Boost is set too high for the application. This fault can also occur if the motor impedance is very low.
Clearing:
Set the following motor parameters per the motor nameplate information, then perform an autotune on the motor.
[vL: Base frequency 1] Nameplate Frequency
[vLv: Base frequency voltage] Nameplate Voltage
[F405: Motor rated capacity] Nameplate kW rating of the motor (Hp*0.745)
[F415: Motor rated current] Nameplate current rating without service factor or overload
[F417: Motor rated speed] Nameplate RPM
[F400: Offline auto-tuning] Set to 2 Auto-tuning at run command (0 after execution)
Inspect the motor and driven equipment for issues prior to clearing any faults. Use one of the following methods to clear the fault.
• The [STOP/RESET] button on the AS3 keypad was pressed twice in quick succession
• Activate a digital input that has been programmed to “Reset” function
• Set the tyP (F007) Parameter to: 4: Clear past trips
Discussion
Torque boost can be an effective method of starting heavy or high inertia loads • The setting value of the [F402: Automatic torque boost] is very high.
• Impedance on the motor is low.

Measures:
Set the motor parameters according to the motor characteristic, and perform autotuning.
[vL: Base frequency 1]
[vLv: Base frequency voltage]
[F405: Motor rated capacity]
[F415: Motor rated current]
[F417: Motor rated speed]
[F400: Offline auto-tuning]
etc.

Please reference latest AS3 Instruction Manual more details or latest information.

AS3 fault codes, descriptions, symptoms and suggested remedies can be found in the below links. Each fault code can also be linked to directly from the AS3 by accessing the QR code on a mobile device while the AS3 is currently experiencing the fault.