Mitsubishi Electric FR-E740-0.75K-NE User Manual

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FR-E700

INSTRUCTION MANUAL (BASIC)

FR-E720-0.1K to 15K-NE

FR-E740-0.4K to 15K-NE

FR-E720S-0.1K to 2.2K-NE

INVERTER

Ethernet communication function

IB(NA)-0600712ENG-B(1706)MEE Printed in Japan Specifications subject to change without notice.

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HEAD OFFICE: TOKYO BUILDING 2-7-3, MARUNOUCHI, CHIYODA-KU, TOKYO 100-8310, JAPAN

CONTENTS

OUTLINE ...................................................................................1

INSTALLATION AND WIRING ................................................... 6

PRECAUTIONS FOR USE OF THE INVERTER ........................20

FAILSAFE OF THE SYSTEM WHICH USES THE INVERTER ...23

DRIVING THE MOTOR ............................................................24

ENERGY SAVING OPERATION FOR FANS AND PUMPS ........35

PARAMETERS .........................................................................36

TROUBLESHOOTING ..............................................................41

PRECAUTIONS FOR MAINTENANCE AND INSPECTION........46

SPECIFICATIONS....................................................................48

Thank you for choosing this Mitsubishi Electric Inverter.

This Instruction Manual (Basic) provides handling information and precautions for use of the equipment.

Please forward this Instruction Manual (Basic) to the end user.

To obtain the related manuals

Contact where you purchased the inverter, your Mitsubishi Electric sales

representative, or the nearest Mitsubishi Electric FA Center for the

following manuals:

 FR-E700 Instruction Manual (Applied) [IB(NA)-0600277ENG]

 FR-E700-NE Ethernet Function Manual [IB(NA)-0600724ENG]

These manuals are required if you are going to utilize functions and

performance.

The PDF manuals are also available for download at the Mitsubishi

Electric FA Global Website (URL: http://www.MitsubishiElectric.co.jp/fa).

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Questions and Answers:

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cmorrisAug 19, 2025
What to do if Mitsubishi Electric FR-E740-0.75K-NE Inverter has overcurrent trip during constant speed?
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  Brianna JenkinsAug 19, 2025
  If your Mitsubishi Electric Inverter is experiencing an overcurrent trip during constant speed operation, it indicates that an overcurrent has occurred. To address this: * Ensure the load is stable. * Inspect the wiring for any output short circuits or ground faults. * Lower the stall prevention operation level. * Activate the stall prevention operation and the fast-response current limit operation (Pr.156). * If the motor is coasting, bring it to a stop before sending a start command. Alternatively, you can use the automatic restart after instantaneous power failure/flying start function.
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Jamie ShawAug 22, 2025
How to resolve overcurrent trip during deceleration or stop on Mitsubishi Electric FR-E740-0.75K-NE Inverter?
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  Cheryl CarlsonAug 22, 2025
  If the Mitsubishi Electric Inverter experiences an overcurrent trip during deceleration or stop, it signifies that an overcurrent has occurred during these phases. Here’s what you can do: * Increase the deceleration time. * Check the wiring for output short circuits or ground faults. * Verify that the mechanical brake isn't activating too early. * Lower the stall prevention operation level. * Activate the stall prevention operation and the fast-response current limit operation (Pr.156). * If the motor is coasting, stop it before issuing a start command. Alternatively, use the automatic restart after instantaneous power failure/flying start function.
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John BurnettAug 26, 2025
How to fix regenerative overvoltage trip during deceleration or stop on Mitsubishi Electric FR-E740-0.75K-NE?
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  Chase HayesAug 26, 2025
  If your Mitsubishi Electric Inverter is tripping due to regenerative overvoltage during deceleration or stop, it means overvoltage has occurred. Try these solutions: * Increase the deceleration time to match the load's moment of inertia. * Make the brake cycle longer. * Use the regeneration avoidance function (Pr. 882, Pr. 883, Pr.885, Pr.886). * Consider using a brake resistor, brake unit, or power regeneration common converter (FR-CV) as needed.
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Marissa ChristianAug 28, 2025
How to resolve regenerative overvoltage trip during acceleration on Mitsubishi Electric FR-E740-0.75K-NE Inverter?
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  Cassandra SpencerAug 28, 2025
  If your Mitsubishi Electric Inverter is tripping due to regenerative overvoltage during acceleration, it means overvoltage has occurred during acceleration. Here are some steps to take: * Decrease the acceleration time. * Implement the regeneration avoidance function using parameters Pr. 882, Pr. 883, Pr.885, and Pr. 886. * Ensure that the stall prevention operation level (Pr. 22) is set correctly.
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Julie MccoySep 1, 2025
What to do if Mitsubishi Electric Inverter shows inverter overload trip?
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  michael86Sep 1, 2025
  If the Mitsubishi Electric Inverter experiences an overload trip (electronic thermal O/L relay function), it signifies that the electronic thermal relay function for inverter element protection has been activated. To address this: * Increase the acceleration time. * Adjust the torque boost setting (Pr. 0). * Configure the load pattern selection setting (Pr. 14) according to the machine's load pattern. * Reduce the load. * Ensure the surrounding air temperature is within specified limits.
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greenalexandraSep 4, 2025
What to do if Mitsubishi Electric FR-E740-0.75K-NE heatsink overheat?
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  Andrew HardinSep 4, 2025
  If your Mitsubishi Electric Inverter's heatsink is overheating, it indicates that the heatsink temperature is too high. To address this: * Ensure the surrounding air temperature is within the specified limits. * Clean the heatsink to remove any dust or obstructions. * Replace the cooling fan if it is not functioning correctly.
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Jessica RobinsonSep 7, 2025
Why does Mitsubishi Electric Inverter show input phase loss?
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  Curtis BrownSep 8, 2025
  If the Mitsubishi Electric Inverter is indicating an input phase loss, it means one of the three input phases is missing or the phase-to-phase voltage is significantly unbalanced. To resolve this: * Ensure all cables are correctly wired. * Repair any breaks in the cable. * Check the input phase loss protection setting (Pr. 872). If the three-phase input voltage is largely unbalanced, set Pr. 872 to '0' to disable input phase loss protection.
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Jacqueline PerkinsSep 12, 2025
What causes stall prevention stop on Mitsubishi Electric FR-E740-0.75K-NE?
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  Diana SpencerSep 12, 2025
  If the Mitsubishi Electric Inverter has a stall prevention stop, it means the output frequency has decreased to 1Hz because of deceleration caused by excessive motor load. To fix this, reduce the load and check the stall prevention operation level setting (Pr. 22).

Mitsubishi Electric FR-E740-0.75K-NE Specifications

General

Model	FR-E740-0.75K-NE
Series	FR-E700
Type	Inverter
Output Power	0.75 kW
Overload Capacity	150% for 60 seconds
Communication	RS-485
Weight	1.5 kg
Horsepower	1 HP
Rated Input AC Voltage	200-240V AC
Control Method	V/f control
Cooling Method	Fan cooling
Protection Features	Overcurrent, Overvoltage, Overheat
Operating Temperature	-10 to +50 °C
Humidity	95% RH or less (non-condensing)
Altitude	Up to 1000 m
Input Voltage	3-phase, 200-240V AC
Storage Temperature	-20 to +65°C (-4 to 149°F)

Summary

OUTLINE

INSTALLATION AND WIRING

Inverter Installation and Environment

Wiring Procedures and Specifications

Details terminal connection diagrams, specifications, and control circuit wiring.

PRECAUTIONS FOR USE OF THE INVERTER

FAILSAFE OF THE SYSTEM WHICH USES THE INVERTER

Interlock Methods Using Inverter Status Signals

Explains how to use inverter status signals for interlocks and alarms.

External Backup Methods for Failsafe

Discusses backup systems outside the inverter for enhanced failsafe.

DRIVING THE MOTOR

PU Operation: Start/Stop and Frequency Setting

Details start/stop and frequency setting methods using the operation panel.

External Operation: Start/Stop and Frequency Setting

Explains start/stop and frequency setting using external terminals.

Advanced Motor Control for Torque and Speed

Covers acquiring large starting torque and low-speed torque with advanced control.

ENERGY SAVING OPERATION FOR FANS AND PUMPS

Load Pattern Selection and Optimum Excitation Control

PARAMETERS

Parameter List Overview

Provides a comprehensive list of inverter parameters, their settings, and initial values.

TROUBLESHOOTING

Resetting Protective Functions

Fault Display List

Lists inverter fault and alarm indications with corresponding corrective actions.

Initial Troubleshooting Checks

PRECAUTIONS FOR MAINTENANCE AND INSPECTION

SPECIFICATIONS

Rating

Common Specifications

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