Error code

ABB All models code 4020

For your safety

This fault is rated high and involves an area that affects personal safety. No remote repair or do-it-yourself instructions are given; do not use the appliance or try to open or repair it.

Hazard area: mains voltage

Do not use the appliance and call an authorised service. If there is a risk to life, move to a safe place and see the emergency numbers.

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Meaning

A simple inertia/damping model is then fitted numerically to the resulting torque/speed characteristic. Error 4020 indicates that the fitting process failed. A common cause for this is la

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Possible causes

A simple inertia/damping model is then fitted numerically to the resulting torque/speed characteristic. Error 4020 indicates that the fitting process failed. A common cause for this is lack of sufficient information to fit the load model. Error 4021 indicates that the rotor did not reach a sufficient speed, or travel a sufficient distance, within the duration of the test. Error 4021 can occur if the torque (or force) generated by the motor is insufficient to overcome friction in the load. Once the motor has reached a sufficient speed, the direction of applied current is reversed to bring the rotor to a halt within specified travel limits. Error 4022 indicates that the test was unable to impose these limits.

Solution

Solution steps are not shared for faults that may be dangerous.

No do-it-yourself solution is given for this fault. For your safety, call an authorised service.