5-1 Protective Functions and Troubleshooting 5Maintenance Operations 5-1 Protective Functions and Troubleshooting Error Code List 5 Maintenance Operations 5-1 Name Description Display on Digital Operator Check point and remedy Reference page Overcurrent protection If the motor is restrained or rapidly accelerated or decelerated, a large current flows through the Inverter, which results in a malfunction. The current exceeding the specified level shuts off the output and an error appears. This protection function detects an overcurrent through the AC CT (current detector). The protection circuit is activated at approximately 220% of the Inverter rated output current and a trip occurs.
Constant speed ek0k1. Is there any rapid load fluctuation? (Eliminate load fluctuation.) Is there any output short-circuit? (Check the output wires.) Is there any ground fault? (Check the output wires and motor.) Deceleration ek0k2. Is there any rapid deceleration? (Increase the deceleration time.) 4-8 4-37 Acceleration ek0k3. Is there any rapid acceleration? (Increase the acceleration time.) Has the motor shaft been locked? (Check the motor and wires.) Is the torque boost too high? (Lower the torque boost.) 4-8 4-37 Others ek0k4. Is the DC injection braking too high? (Lower the injection breaking.) Is there any error on CT?
(Replace or repair the CT.) 4-24 Overload protection *1 Monitors the Inverter output current and shuts off the output, displaying an error if the built-in electronic thermal function detects overload against the motor. Trips depending on the electronic thermal function settings. ek0k5. Is the load too large? (Reduce the loading factor.) Is the thermal level correct? (Adjust the thermal level to an appropriate level.) Note: The electronic thermal function is set to work easily at 5 Hz or lower. If a large load inertial moment is applied, the overload protect function works when the motor starts accelerating, and prevents it from accelerating.
In this case, increase the torque boost or take other measures for adjustment. 4-46 ek0k1. ek0k2. ek0k3. ek0k4. ek0k5.