User Guide of EM730 Series Inverter Chapter 6 Protection/Warning Solutions 6.1 Protection content When the inverter is in the abnormal status, the digital tube display will show the corresponding protection code and its parameters, the protection relay and protection output terminal will work, and the inverter will stop the output. In case of protection, the motor will stop rotating normally or slow down until it is stopped. The protection contents and solutions of the EM730 series inverter are shown in Table. 46 Protection Protection Type Protection Cause Protection Solution code E01 Short circuit protection 1. Short circuit to the ground. 2. Inter-phase short circuit 3.
Short circuit of the external braking resistor. 4. The acceleration and deceleration time is too short. 5. The inverter module is damaged. 6. There is excessive on-site interference. 1. Check the wiring for short circuits. 2. Properly increase the acceleration and deceleration time. 3. Investigate the cause and reset the controller after implementing the corresponding solutions. 4. Seek technical support. E02 Instantaneous overcurrent 1. The acceleration and deceleration time is too short. 2. In the V/F drive mode, the V/F curve setting is unreasonable. 3. The motor is running during startup. 4. The motor used is beyond the capacity of the inverter or the load is too heavy. 5.
Motor parameters are not suitable and need to be identified. 6. The phases on the output side of the inverter are short-circuited. 7. The inverter is damaged. 1. Increase the acceleration and deceleration time. 2. Reasonably set the V/F curve. 3. Enable speed tracking or start DC braking. 4. Use the appropriate motor or inverter. 5. Identify the motor parameters. 6. Check the wiring for short circuits. 7. Seek technical support. E04 Steady-state overcurrent The same as E02 The same as E02 E05 Overvoltage 1. The deceleration time is too 1. Increase the deceleration time.