‹ Operator Programming Errors An Operator Programming Error (OPE) occurs when two or more parameter related to each other are set inappropriately or an individual parameter setting is incorrect. The Inverter does not operate until the parameter setting is corrected; however, no other alarm or fault output will occur. If an OPE occurs, change the related parameter by checking the cause shown in the table below. When an OPE error is displayed, press the ENTER key to see U1-34 (OPE Detected). This monitor displays the parameter that is causing the OPE error. EN-22 Display Alarm Fault Meaning Corrective Actions Heatsink Overheat The temperature of the Inverter’s heatsink exceeded 105 °C.
• Check for dirt build-up on the fans or heat- sink. • Reduce the ambient temperature around the drive. • Replace the cooling fan(s). Inverter’s Cooling Fan Stopped Motor Overload Detected when L1-01 is set to 1,2 or 3 and the Inverter’s I²t value exceeded the motor overload curve. The overload curve is adjustable using parame- ter E2-01 (Motor Rated Current), L1-01 (Motor Pro- tection Selection) and L2-02 (Motor Protection Time Constant) • Recheck the cycle time and the size of the load as well as the accel/decel times (C1-). • Check the V/f characteristics (E1-). • Check the setting of Motor Rated Current Setting (E2-01).
Inverter Overload The Inverter output current exceeded the Invert- ers’s overload capability • Recheck the cycle time and the size of the load as well as the accel/decel times (C1-). • Check the V/f Characteristics (E1-). • Check if the inverter rated current matches the motor rated current. (only in stop condi- tio) The DC bus voltage has exceeded the overvolt- age detection level. Default detection levels are: 200 V class: 410 VDC 400 V class: 820 VDC • Increase the deceleration time (C1-02/04) or connect a braking option. • Check the power supply and decrease the voltage to meet the inverter’s specifications. • Check the braking chopper / resistor.
Input Phase Loss Too big DC bus voltage ripple. Only detected when L8-05=1 (enabled) • Tighten the input terminal screws • Check the power supply voltage DC Bus Fuse Open The fuse in the main circuit is blown. Warning: Never run the Inverter after replacing the DC bus fuse without checking for shorted compo- nents. • Check the motor and the motor cables for short circuits or insulation failures (phase-to- phase). • Replace the inverter after correcting the fault. (only in stop condi- tio) The DC bus voltage is below the Undervoltage Detection Level (L2-05). The default settings are: 200V class: 190 VDC 400 V class: 380 VDC • Check the input voltage.
• Check the wiring of the input terminals. • Check the input voltage and the wiring of the input terminals. • Extend the settings in C1-01/03 Main Circuit MC Operation Failure No MC response during Inverter operation. Replace the Inverter. Control Power Supply Undervoltage Undervoltage of the control circuit while the Inverter was running. • Remove all connection to the control termi- nals and cycle the power to the Inverter. • Replace the Inverter. Display Meaning Corrective Actions Inverter kVA Setting Error Enter the correct kVA setting in o2-04. Parameter Setting is out of its range Verify the parameter settings.