User’s Guide for EM760 series high-performance vector inverter 44 3. The PG card selected is not of the right type. 4. The encoder is damaged. 5. There is on-site interference. 3. Check the PG card type selected. 4. Replace the encoder. 5. Take electromagnetic compatibility measures (e.g. use of magnetic ring) for the inverter output cable. E23 Keyboard memory fails 1. Interference results in memory reading and writing errors. 2. The memory is damaged. 1. Press the STOP key for resetting and retry. 2. Seek technical support. E24 Self-identification error – Auto tuning error 1. Press the STOP key during parameter identification auto-tuning. 2.
The external terminal stops working (FRS = ON) properly during parameter identification auto-tuning. 3. The motor is not connected. 4. The rotary self-learning auto-tuning motor is not disconnected from the load. 5. The motor fails. 1. Press the STOP key for resetting. 2. The external terminal should not be operated during parameter identification auto-tuning. 3. Check the connection between the inverter and motor. 4. Disconnect the rotary self-learning auto-tuning motor from the load. 5. Check the motor. E25 Motor overspeed protection 1. PG card is not connected 2. Encoder line count F01.25 is not properly set 3. AB phase sequence F01.27 is incorrect 4.
Excessive load results in greater motor speed than the given inverter speed or reverse rotation of the motor 1. Connect the PG card or switch to V/F control 2. Set the encoder line count according to the encoder instructions 3. Exchange the A and B phase wiring of the encoder. 4. Reduce the load or replace with an inverter and motor of the immediately greater power. E26 Load loss protection 1. The motor is not connected or does not match the load. 2. Load loss occurs. 3. The parameters of load loss protection are not set reasonably. 1、 Check the wiring and use the appropriate motor 2、 Check the equipment. 3、 Change the off-load detection level F07.22 and detection time F07.23.
E27 Up to cumulative power-on time 1. The inverter maintenance time is up. 1. Please contact the dealer for technical support. E28 Up to cumulative running time 1. The inverter maintenance time is up. 1. Please contact the dealer for technical support. E43 Material cutoff protection 1. When the external signal is detected, the external signal terminal is closed. 2. During automatic detection, the feedback is greater than the upper voltage limit or less than the 1. When disconnection occurs upon startup, reduce the initial feedforward and the soft start feedforward gain. 2. When oscillation disconnection occurs during operation, change the proportion P.