User Manual of EM760 High-Performance Inverter to reset/clear protection or use the protection resetting terminal to exit the protection status. If the protection has been eliminated, the inverter will return to the function setting status; otherwise, the digital tube will continue to display the current protection information. When the inverter is subject to the aforesaid protection, press the STOP key The protection number corresponds to the digit behind the letter “E”. For example, the digit corresponding to “EXX” is “XX”. For example, E01 corresponds to 1, and E10 corresponds to 10.
8.2 Protection analysis If the motor does not work as expected due to errors in function setting and external control terminal connection after the inverter is powered on, refer to the analysis in this section for the corresponding solutions. If a protection code is displayed, see the solution in 9.1. 221 E28 Up to cumulative running time 1. The inverter maintenance time is up. 1. 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 lower voltage limit. 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. 3. Check whether it is caused by loose connection of the sensor. E44 Wiring protection 1. The valid time of the wiring detection terminal is too long. 2. The invalid time of the wiring detection terminal is too long. 1. Check whether the sensor can work normally. 2. Check whether the terminal is capable of properly judging the closing and opening. E57 Overpressure in pipeline network 1. The feedback pressure in the water supply application is too high. 1.
Check whether the sensor is in the abnormal status. 2. Check whether the analog input terminal can be normal. 3. Check the external device. E76 The output is short-circuited to ground. 1. The output is short-circuited to ground. 2. The inverter module is damaged. 1. Check whether the output cable is broken or whether the motor shell is broken down. 2. Investigate the cause and reset the controller after implementing the corresponding solutions. 3. Seek technical support. E81 Encoder line count fault 1. An incorrect encoder line count is set. 2. The motor encoder is improperly wired 1. Check the motor wiring line count for correctness. 2. Check the motor encoder wiring for correctness.
C30 No PG card is detected 1. F00.01 is set to 2, but no PG card is inserted 1. When closed-loop control is used, please insert corresponding encoder PG card C31 Two absolutely identical cards 1. Two absolutely identical cards are inserted in the card slots 1. Please check whether a wrong card is inserted C32 Two cards of the same type 1. Two cards of the same type are inserted in the card slots; for example, both are PG cards or communication cards 1. Please check whether a wrong card is inserted