Cause : EMERGENCY STOP comes when drive has received emergency stop command and ramps to stop according to ramp time defined by parameter 2208 EMERG DEC TIME.

The A2023 code on your ABB ACS150 drive indicates an Emergency Stop alarm. This means the drive has received an emergency stop command and is stopping the motor according to the programmed deceleration ramp time defined by parameter 2208 "EMERG DEC. TIME."

1. Check that it is safe to continue operation.
2. Return emergency stop push button to normal position.