Mitsubishi Electric FR-E720S-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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Brian CooperAug 17, 2025
What to do if Mitsubishi Electric Inverter has overcurrent trip during constant speed?
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  johnsonbrandiAug 17, 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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Gregory ObrienAug 21, 2025
How to resolve overcurrent trip during deceleration or stop on Mitsubishi Electric FR-E720S-0.75K-NE Inverter?
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  Kevin SmithAug 21, 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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Jennifer CastilloAug 25, 2025
How to fix regenerative overvoltage trip during deceleration or stop on Mitsubishi Electric FR-E720S-0.75K-NE Inverter?
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  Andrew WalkerAug 25, 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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Sarah CruzAug 27, 2025
How to resolve regenerative overvoltage trip during acceleration on Mitsubishi Electric FR-E720S-0.75K-NE Inverter?
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  Aaron TurnerAug 27, 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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mooreheatherAug 31, 2025
What to do if Mitsubishi Electric FR-E720S-0.75K-NE shows inverter overload trip?
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  mcneilashleyAug 31, 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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ianedwardsSep 3, 2025
What to do if Mitsubishi Electric FR-E720S-0.75K-NE heatsink overheat?
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  Mason WuSep 3, 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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Jim DelgadoSep 6, 2025
Why does Mitsubishi Electric Inverter show input phase loss?
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  Michael FlowersSep 7, 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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Ronald BallSep 10, 2025
What causes stall prevention stop on Mitsubishi Electric FR-E720S-0.75K-NE Inverter?
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  Roger AlvaradoSep 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-E720S-0.75K-NE Specifications

General

Series	FR-E700
Power Rating	0.75 kW
Horsepower	1 HP
Max Output Frequency	400 Hz
Cooling Method	Fan Cooled
Protection Rating	IP20
Weight	1.5 kg
Input Voltage	200-240 VAC
Output Voltage	0-240 VAC
Input Phase	Single Phase
Output Phase	3-Phase
Frame Size	FR-A
Control Method	V/f Control
Input Voltage (3-Phase)	Not Applicable
Frequency Range	0-400 Hz
Overload Capacity	150% for 60 seconds

Summary

1 OUTLINE

1.2 Operation Panel

1.2.3 Changing Parameter Settings

Guides on how to modify parameter values for specific settings.

2 Installation and Wiring

2.2 Inverter Installation Instructions

Provides detailed instructions and precautions for installing the inverter unit.

2.3 Wiring Procedures

Explains the wiring procedures for the inverter's main and control circuits.

2.3.1 Terminal Connection Diagram

Illustrates the terminal connections for main and control circuits.

2.3.2 Terminal Specifications

Lists and describes the specifications for each terminal.

2.3.3 Main Circuit Terminal Arrangement

Shows terminal layouts for different inverter models for wiring.

2.3.4 Control Circuit Wiring

Details the wiring methods for the control circuit.

2.8 External Brake Resistor Connection

3 Inverter Usage Precautions

Inverter Input Contactor Usage

Warns against using the input side magnetic contactor for starting/stopping.

I/O Signal Circuit Voltage Safety

Warns against applying incorrect voltages to I/O signal circuits.

Overload Operation Instructions

4 System Failsafe Measures

5 Motor Operation

5.1 PU Operation: Start and Stop

5.1.1 Setting Frequency via Operation Panel

5.1.3 Multi-Speed Setting with Switches

5.1.4 Analog Input Frequency Setting

5.2 External Terminal Operation: Start/Stop

5.2.2 Multi-Speed Setting with Switches (External)

5.2.3 Analog Input Frequency Setting (External)

5.3 Improving Low Speed Torque

5.3.1 Advanced Magnetic Flux Vector Control

5.3.2 General-Purpose Magnetic Flux Vector Control

6 Energy Saving for Fans and Pumps

7 Parameter Reference

7.1 Detailed Parameter List

Lists all available parameters with their settings, initial values, and ranges.

8 Troubleshooting Guide

8.1 Resetting Protective Functions

8.2 List of Fault Displays

Lists common fault and alarm indications with their descriptions and corrective actions.

8.3 Initial Troubleshooting Checks

Provides initial checks and countermeasures for common operational issues.

9 Maintenance and Inspection Precautions

9.1 Inspection Items and Schedule

9.2 Parts Replacement Guidelines

10 Technical Specifications

10.1 Inverter Ratings

10.2 Common Specifications

Warranty Information

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