iG5A, product manual - H2flow

12.2 Fault remedyKeypaddisplayOvercurrentCauseRemedyCautionWhen an overcurrent fault occurs, operation must be started after the cause isremoved to avoid damage to IGBT inside the inverter.Accel/Decel time is too short comparedto the GD 2 of the load.Load is greater than the inverter rating.Inverter output is issued when the motoris free running.Output short circuit or ground fault hasoccurred.Mechanical brake of the motor isoperating too fast. Increase the Accel/Decel time. Replace the inverter with appropriatecapacity. Resume operation after stopping themotor or use H22 (Speed search). Check output wiring. Check the mechanical brake.Overcurrent2Ground faultcurrentInverteroverloadShort occurs between up and down ofIGBTInverter output short occurs.Accel/Decel time is very fast comparingwith GD 2Ground fault has occurred at the outputwiring of the inverterThe insulation of the motor is damageddue to heatLoad is greater than the inverter rating.Torque boost scale is set too large. Check the IGBT. Check output Wring. Increase the Accel/Decel time. Check the wiring of the outputterminal. Replace the motor. Upgrade the capacity of motor andinverter or reduce the load weight. Reduce torque boost scale.Overload tripInverteroverheatOutputPhase lossCooling fanfaultCooling system has faults.An old cooling fan is not replaced with anew one.Ambient temperature is too high.Faulty contact of magnetic switch atoutputFaulty output wiringAn alien substance is clogged in aventilating slot.Inverter has been in use withoutchanging a cooling fan. Check for alien substances cloggedin the heat sink. Replace the old cooling fan with anew one. Keep ambient temperature under50°C. Make connection of magnetic switchat output of the inverter securely. Check output wiring. Check the ventilating slot and removethe clogged substances. Replace the cooling fan.12-3