User Guide of EM730 Series Inverter 48 ventilation. 3. The cooling fan fails. 2. Improve the ventilation environment and check whether the air duct is blocked. 3. Replace the cooling fan. E11 Parameter setting conflict 1. There is a logic conflict in parameter settings. 1. Check whether parameters set is illogical before the protection. 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/RESET key to reset the controller and try again. 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. Check whether the inverter temperature sensor is connected properly. 2. Seek technical support. E18 The soft start relay is not engaged. 1. The power supply fails during operation. 2. The input power supply is subject to phase loss. 3. The terminals of the input power supply are loose. 4. The voltage of the input power supply drops too much. 5. The switch contacts of the input power supply are aging. 1. Stop the inverter before power-off, or directly reset the protection. 2.
Check the input power supply and wiring. 3. Tighten the screws of input terminals. 4. Check the air circuit breaker and contactor. E19 Error of current detection circuit The detection circuit of the drive board or control board is damaged. 1. Seek technical support.