User’s Guide for EM760 series high-performance vector inverter 45 lower voltage limit. 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 sheath is damaged and 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 ppr count fault 1. An incorrect encoder line ppr count is set. 2. The motor encoder is improperly wired 1. Check the motor wiring line count for correctness. Check if the encoder ppr no. is correct. 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