User’s Guide for EM760 series high-performance vector inverter 43 3. Excess environment temperature. 4. The load is too heavy. 3. Strengthen the heat dissipation of the motor. 4. The motor model is not suitable. E13 Motor overload 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 load is too heavy. 1. Increase the acceleration and deceleration time. 2. Reasonably set the V/F curve. 3. Use a motor matching the load. E14 External protection 1. The protection terminal of the external device acts. 1. Check the external device. E15 Inverter memory protection 1.Interference results in memory reading and writing errors. 2.
The internal memory of the controller is read and written repeatedly, causing damage to the memory. 1. Press the STOP key for resetting and retry. 2. For the parameters (e.g. frequency setting) to be modified frequently, set F10.56 to 11 after debugging. E16 Communication error 1. Communication timeout is enabled in the discontinuous communication system. 2. Communication is disconnected. 1. F10.03 is set to 0.0 in the discontinuous communication system. 2. Adjust the F10.03 communication timeout. 3. Check whether the communication cable is disconnected. E17 Abnormality of inverter temperature sensor The inverter temperature sensor is disconnected or short-circuited. 1.
Seek technical support. E18 The soft start relay is not engaged. 1. The wiring gets loose. 2. The soft start relay fails. Check the inverter wiring. 1. Seek technical support. E19 Error of current detection circuit The detection circuit of the drive board or control board is damaged. 1. Seek technical support. E20 Stall protection 1. The deceleration time is too short. 2. Error of dynamic brake for deceleration. 3. The load is too heavy. 1. Increase the deceleration time. 2. Check the dynamic brake. 3. Check whether the motor cannot be stopped as it is driven by another load. E21 PID feedback disconnection 1.
The PID feedback is greater than the upper limit (F09.24) or less than the lower limit (F09.25), depending on the type of the feedback sensor. 1. Check whether the feedback line falls off. 2. Check whether the sensor is working abnormally. 3. Adjust the detection value of feedback disconnection to a reasonable level. E22 Encoder fault 1. The encoder is not properly wired. 2. The PG card is not installed properly. 1. Check the wiring of the PG card and encoder. 2. Check whether the PG card is inserted properly.