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Rodney DixonAug 22, 2025
What to do for Mitsubishi Electric FR-E740-026 reset?
- TTammy ReevesAug 22, 2025
To resolve an unexpected inverter reset on your Mitsubishi Electric Inverter, turn off the reset command.
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To resolve an unexpected inverter reset on your Mitsubishi Electric Inverter, turn off the reset command.
What to do if Mitsubishi Electric Inverter trips due to overcurrent during acceleration?
Here are some possible solutions: 1. Increase the acceleration time. 2. If "E.OC1" is continuously lit at startup, disconnect the motor and then start the inverter. 3. Inspect the wiring to ensure there is no output short circuit or ground fault. 4. Enable stall prevention operation. 5. Set the base voltage (rated voltage of the motor) in Pr. 19 Base frequency voltage.
How to fix write disable error on Mitsubishi Electric FR-E740-026?
A write disable error on your Mitsubishi Electric Inverter may occur due to several reasons: * If Pr. 77 Parameter write selection is set to disable parameter write, check this setting. * If the frequency jump setting range is overlapping, review the settings of Pr. 31 to Pr. 36 (frequency jump). * If the PU and inverter are not communicating correctly, verify the connection between the PU and the inverter.
What to do if Mitsubishi Electric FR-E740-026 shows regenerative brake prealarm?
If you're seeing a regenerative brake prealarm on your Mitsubishi Electric Inverter: 1. Try increasing the deceleration time. 2. Make sure that the Pr. 30 Regenerative function selection and Pr. 70 Special regenerative brake duty settings are configured correctly.
Why is Mitsubishi Electric Inverter showing electronic thermal relay function prealarm?
If your Mitsubishi Electric Inverter is showing an electronic thermal relay function prealarm: 1. Reduce the load and frequency of operation. 2. Set an appropriate value in Pr. 9 Electronic thermal O/L relay.
What to do for regenerative overvoltage trip during acceleration on Mitsubishi Electric Inverter?
To resolve regenerative overvoltage trip during acceleration on your Mitsubishi Electric Inverter: 1. Decrease the acceleration time. 2. Ensure that the regeneration avoidance function (Pr. 882, Pr. 883, Pr. 885, Pr. 886) is enabled and properly configured.
What to do if Mitsubishi Electric Inverter shows undervoltage?
If your Mitsubishi Electric Inverter is showing an undervoltage error, check the power supply system equipment, including the power supply itself.
How to resolve Mitsubishi Electric FR-E740-026 overload trip (electronic thermal relay function)?
To resolve an inverter overload trip (electronic thermal relay function) on your Mitsubishi Electric Inverter: 1. Reduce the load weight. 2. Ensure the ambient temperature is within specified limits.
How to resolve motor overload trip (electronic thermal relay function) on Mitsubishi Electric FR-E740-026?
To address a motor overload trip (electronic thermal relay function) on your Mitsubishi Electric Inverter: 1. Reduce the load weight. 2. If using a constant-torque motor, configure Pr. 71 Applied motor to indicate a constant-torque motor.
What to do if Mitsubishi Electric FR-E740-026 Inverter shows input phase loss?
If your Mitsubishi Electric Inverter indicates an input phase loss: * Ensure the cables are wired correctly. * Repair any breaks in the cable. * Verify the Pr. 872 Input phase loss protection selection setting.
General| Model | FR-E740-026 |
|---|---|
| Series | FR-E700 |
| Frequency Range | 50/60Hz |
| Protection Class | IP20 |
| Output Frequency Range | 0-400Hz |
| Control Method | V/f control, Vector control |
| Protection Structure | Open type |
| Overload current rating | 150% for 60 seconds |
| Cooling method | Fan cooled |
| Operating temperature | -10°C to +50°C |
| Storage temperature | -20°C to +65°C |
| Ambient humidity | 95% RH or less (non-condensing) |
| Vibration resistance | 5.9 m/s² |
| Communication | RS-485 |
Unpacking and verifying inverter components and rating plates.
Basic wiring procedures, including terminal connection diagrams for standard and safety stop models.
Details on main circuit terminals, power supply, and motor wiring arrangements for different inverter series.
Guidance on minimizing electromagnetic interference and managing leakage currents for safe operation.
Essential safety guidelines and operational precautions to prevent product damage or shortened lifespan.
A comprehensive list of all inverter parameters, their settings, and related pages for detailed explanation.
Details on adjusting motor torque using boost, slip compensation, and stall prevention functions.
Configuration of acceleration, deceleration times, and patterns for smooth motor start-up and stop.
Guidance on motor selection, overheat protection, and using auto-tuning for optimal performance.
Procedures for resetting inverter protective functions after faults or warnings.
A comprehensive list of all fault and alarm codes with their corresponding names and page references.
Detailed troubleshooting guide for common error messages, warnings, and faults with suggested corrective actions.
A systematic checklist for diagnosing common operational issues like motor not starting or speed variations.
