Mitsubishi FR-V220E Drive

Mitsubishi FR-V220E Drive Fault Codes:

Fault Code and Meaning	Cause and Remedy
OC During Acc E.OC1 Overcurrent during acceleration	Cause: Overcurrent. Main circuit device overheat. Remedy: Check if acceleration is too fast. Check for output short circuit or ground fault. Check for cooling fan stop. Increase acceleration time. Change fan. Remove obstacle to cooling fan.
Stedy Spd Oc E.OC2 Overcurrent during constant speed	Cause: Overcurrent. Main circuit device overheat. Remedy: Check for sudden load change. Check for output short circuit or ground fault. Check for cooling fan stop. Keep load stable. Change fan. Remove obstacle to cooling fan.
OC During Dec E.OC3 Overcurrent during deceleration	Cause: Overcurrent. Main circuit device overheat. Remedy: Check if deceleration is too fast. Check for output short circuit or ground fault. Check for cooling fan stop. Check if mechanical brake operates too fast. Increase deceleration time. Check brake operation.
Ov During Acc E.OV1 Overvoltage during acceleration	Cause: Overvoltage on DC bus (terminals P (+) and N (-)). Remedy: Check if acceleration is too fast. Increase acceleration time.
Stedy Spd Ov E.OV2 Overvoltage during constant speed	Cause: Overvoltage on DC bus (terminals P (+) and N (-)). Remedy: Check for sudden load change. Keep load stable.
Ov During Dec E.OV3 Overvoltage during deceleration	Cause: Overvoltage on DC bus (terminals P (+) and N (-)). Remedy: Check if deceleration is too fast. Increase deceleration time (Set deceleration time which matches load GD²). Reduce braking duty.
Motor Overload THM Overload alarm (Thermal relay for motor)	Cause: Motor used under overload. Remedy: Reduce load. Increase motor and inverter capacities.
Inv. Overload THT Overload alarm (Thermal relay for inverter)	Cause: Motor used under overload. Remedy: Reduce load. Increase motor and inverter capacities.
Inst. Pwr. Loss IPF Instantaneous power failure	Cause: Instantaneous power failure. Remedy: Check the cause of instantaneous power failure. Investigate power supply system.
Under Voltage UVT Undervoltage	Cause: Drop of power supply voltage. No jumper across terminals P (+) – P1. Remedy: Large-capacity motor started? Check for jumper across terminals P (+) – P1. Check power system equipment such as power supply capacity. Install jumper if disconnected.
Br. Cct. Fault BE Brake transistor alarm	Cause: Brake transistor fault (only 5.5K or less). Remedy: Check if braking duty is proper. Reduce load GD². Reduce braking duty.
Overspeed occurrence OS Overspeed occurrence	Cause: The motor speed exceeded the set overspeed level. Remedy: Check Pr. 69 “number of PLG pulses” setting correctness. Set Pr. 69 “number of PLG pulses” value correctly.
OH Fault OHT External thermal relay operation	Cause: Temperature detector in motor operated. Remedy: Check motor for overheat. Reduce load and frequency of operation.
Stll Prev STP OLT Stall prevention	Cause: Stall prevention or current limit function activated too long. Remedy: Check if motor is used under overload. Reduce load. Increase motor and inverter capacities.
Option Fault OPT Inboard option connection alarm	Cause: Option and inverter connected improperly. Remedy: Check for loose connector. Securely connect.
Corrupt Memry PE Parameter storage device alarm	Cause: Storage device (E²PROM) fault. Remedy: Number of parameter write times too many? Change inverter.
Excessive speed deflection OSD Excessive speed deflection	Cause: The deflection between the speed setting and motor speed exceeded the deflection level. Remedy: Is the load too large? Check Pr. 69 “number of PLG pulses” setting correctness. Lighten the load. Set Pr. 69 “number of PLG pulses” value correctly.
PU Leave Out PUE PU disconnected	Cause: PU disconnected from connector. Remedy: Check for loose PU fitting. Fit PU securely.
CPU Fault CPU CPU error	Cause: Internal CPU malfunction. Remedy: Check for loose connector. Change inverter.
No encoder signal ECT No encoder signal	Cause: The PLG pulse is not being input. Remedy: Check for loose connector. Check for wire breakage in cable. Securely connect. Replace cable.
PU to Inverter comms. Error 0.00 (LED display proper) Inv. Reset ON	Cause: Reset signal ON. Loose connection between PU and inverter. Communication circuit fault. Remedy: Check for miswiring to reset terminal. Check for loose connector. Turn the reset signal off. Securely connect. Change inverter.
Excessive position error OD Position error large	Cause: Difference between position command and position feedback exceeded detection level. Remedy: Check that the installation direction of the encoder for position detection and parameters match. Is the load too large? Check Pr. 69 “number of PLG pulses” setting correctness. Check the parameters. Lighten the load. Set Pr. 69 “number of PLG pulses” value correctly.
No encoder A signal ECA No encoder signal	Cause: The PLG pulse for the FR-VPA is not being input. Remedy: FR-VPA connected properly? Check for loose connector. Check for wire breakage in cable. Check for detector fault. Securely connect. Replace cable. Replace the detector.