A90 series Inverter User Guide 33 loose. 3.Input voltage drops too much. 4.Aging of switch contact on input power supply. 2.Tighten screws of input wiring terminal. 3.Check air switch and contactor. E07 Input Phase Loss 1.Input voltage phase loss. 2.The input power fluctuates greatly 1.Check input voltage. 2.Check input voltage wiring. 3.Check whether the connection terminals are loosened. E08 Output Phase Loss 1. Phase loss of U, V or W 1.Check the connection between inverter and motor. 2.Check whether motor winding is disconnected; 3.Check whether output terminals are loosened. E09 Inverter Overload 1. Acceleration/deceleration time is too short. 2.
Under V/F control mode, V/F curve has been set irrationally. 3. Load is too heavy. 4. Brake time is too long; Repeated DC brake 1.Extend acceleration/deceleration time. 2.Set VF curve rationally. 3.Replace inverter that matches with the load. 4.Reduce brake time; Do not repeatedly DC brake E10 Inverter Overheat 1. Ambient temperature is too high. 2. Inverter is in poor ventilation. 3. Cooling fan fault. 1. Running conditions shall comply with specification requirements. 2. Improve ventilation environment and check whether heatsink is blocked. 3. Replace the cooling fan. E11 Parameter Setting Conflict 1. Parameter setting logic conflict 1. Check whether parameters set is unreasonable.
E13 Motor Overload 1. Acceleration/deceleration time is too short. 2. Under V/F control mode, V/F curve has been set irrationally. 3. Load is too heavy. 1. Extend acceleration/deceleration time. 2. Set VF curve rationally. 3. Replace motor with another one that matches with the load. E14 External Fault 1.Peripheral fault terminal is enabled. 1.Check peripherals. E15 EEPROM Fault 1.Interference results in reading and writing errors of EEPROM. 2.The controller repeatedly writes the internal memory, causing the memory to be damaged. 1.Press STOP/RESET to reset and then try it again. 2. Do not repeatedly writes the internal memory. 3.
Set F10.56=11 to avoid damage E16 Communication Abnormality 1.the communication time out is enabled for discontinuous communication system 1.Set F10.03 = 0.0 for discontinuous communication system