Mitsubishi inverter fault alarm signal and processing method - Database & Sql Blog Articles

Display code FR-DU04 Parameter unit FR-PU04 Fault name Fault cause handling method E.OC1OC During Acc acceleration Acceleration overcurrent When the inverter output current reaches or exceeds 200% of the rated current, the protection circuit operates and stops the inverter output. The acceleration time is too short to increase the acceleration time. Check if the output is shorted or grounded. E.OC2Steady Spd OC Over-current trip check at constant speed Check whether the load is abrupt? Keep the load stable. Check if the output is shorted or grounded. E.OC3OC During Dec. When deceleration stops, the overcurrent trip deceleration time is too short and the deceleration time is increased. Check if the output is shorted or grounded. E.OV1OV During Acc acceleration, the regenerative overvoltage is disconnected. The regenerative energy from the motor causes the internal DC main circuit voltage of the inverter to rise to or above the specified value, and the protection circuit operates to stop the inverter output. It may also be caused by the surge voltage of the power system. Accelerating too fast? Increase the acceleration time E.OV2Steady Spd OV When the regenerative overvoltage disconnection check speed is abnormal? Keep the load stable. E.OV3OV During Dec deceleration, when regenerative overvoltage is stopped, deceleration is too fast? Increase the deceleration time E.THMMotor Overload motor overload overload motor overload reduction load. When it happens frequently, the capacity of the inverter and motor can be increased according to the process requirements. E.THTInv. Overload frequency converter overload interruption inverter overload E.IPFInst.Pwr. Loss instantaneous power failure protection power supply E.UVTUnder Voltage low voltage protection circuit has a large capacity motor to start the power supply system to avoid frequent start in the loop The impact of large-capacity motors. E.FINH/Sink O/Temp heat sink overheating environment temperature is too high to enhance ventilation while reducing the load E.BEBr. Cct. Fault brake transistor alarm braking rate setting is normal? E.GFGround Fault Output Side Ground Fault Overcurrent Protection Motor or Cable Ground Fault Resolve Ground Fault E.OHTOH Fault External Thermal Relay Action Check Motor Overheat Reduce Load and Solve Mechanical Fault E.OLTStll Prev STP Stall Prevent (display OL during operation) The motor overload reduces the load. When it happens frequently, the capacity of the inverter and motor can be increased according to the process requirements. Display code FR-DU04 parameter unit FR-PU04 fault name fault cause processing method E.OPTOption Fault option alarm option interface loose and reliable connection E.PECorrupt Memry parameter error input parameters too many times, the inverter crashes. Reset the parameters after restoring the factory settings. When the inverter cannot be restored, the E.PUEPU Leave Out panel is removed. The operation panel is securely installed. E.RETRetry No Over The number of retry attempts is less than the number of retry attempts. The inverter stops outputting. Check for an abnormality before the abnormality occurs. E.P24 DC 24V power supply output short circuit Check if the PC terminal is short-circuited? Repair the short circuit. Use the panel to reset or turn off the power to re-close when reset is required. E.CTE operation panel power supply short circuit operation panel connection cable is short-circuited. Repair the short circuit. E. CPUCPU FaultCPU error Check loose interface, reliable connection. E.MB1~~E.MB7 Sequential Brake Error Check if the brake sequence is normal. E.3Fault 3 Option Abnormal communication option setting error or poor contact. Check the option settings and the operation is incorrect. The option connector socket is indeed connected. E.6Fault 6CPU error When the built-in CPU has a communication error, the inverter stops outputting. The CPU communication error occurs and the inverter stops outputting. The power failure reset is restarted. E.7Fault 7CPU error E.LFE.LF output phase loss protection When one phase of the inverter output three phases is disconnected, the inverter stops output. Check the disconnected output phase. FNFan Failure Is the fan failure cooling fan normal? Replace the fan. OLOL stall prevents the overcurrent motor from being used under overload conditions? Reduce the load oLoL stall to prevent the overvoltage from decelerating? Extending the deceleration time Does the PSPS panel stop the remote control operation using the "STOP" button on the operation panel to stop? Check the load status. Err operation error, please operate accurately