Mitsubishi Electric FR-E720-1.5K

Other manuals for Mitsubishi Electric FR-E720-1.5K

Instructions89 pages

Questions and Answers

M
Michael GarciaNov 22, 2025
How to fix overcurrent trip during acceleration on Mitsubishi Electric FR-E720-1.5K?
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  kennedyaustinNov 22, 2025
  If the Mitsubishi Electric Inverter experiences an overcurrent trip during acceleration, it means that an overcurrent has occurred. To resolve this, try the following: * Increase the acceleration time. * Check for output short circuits or ground faults in the wiring. * If 'E.OC1' appears consistently at start, disconnect and restart the inverter. If the problem persists, the inverter may be faulty and you should contact your sales representative. * Ensure the base frequency is correctly set (Pr. 3) for your motor (50Hz). * Reduce the stall prevention operation level and activate both stall prevention and fast-response current limit operations (Pr.156). * For regenerative driving, adjust the base voltage in Pr. 19. * If the motor is coasting, stop it before issuing a start co...
M
Michelle CookAug 25, 2025
What to do if Mitsubishi Electric Inverter has overcurrent trip during constant speed?
- D
  dixonjeromeAug 26, 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.
S
Scott HoganAug 27, 2025
How to resolve overcurrent trip during deceleration or stop on Mitsubishi Electric Inverter?
- M
  maria78Aug 27, 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.
V
veronica72Aug 27, 2025
How to fix regenerative overvoltage trip during deceleration or stop on Mitsubishi Electric FR-E720-1.5K?
- D
  don53Aug 28, 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.
D
Derrick SmithAug 29, 2025
How to resolve regenerative overvoltage trip during acceleration on Mitsubishi Electric Inverter?
- D
  Dana BeckAug 29, 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.
A
Ashley BookerSep 23, 2025
What to do if Mitsubishi Electric FR-E720-1.5K shows brake transistor alarm detection?
- C
  Christopher HessSep 23, 2025
  If the Mitsubishi Electric Inverter detects a fault in the brake circuit, such as a brake transistor breakage, replace the inverter.
D
David Martinez MDSep 16, 2025
What causes undervoltage on Mitsubishi Electric Inverter?
- M
  murphysusanSep 16, 2025
  If the Mitsubishi Electric Inverter detects undervoltage, it means the voltage at the main circuit power has been lowered. Investigate the devices on the power supply line, including the power supply itself.
L
lambertderekSep 18, 2025
What does fan alarm mean on Mitsubishi Electric FR-E720-1.5K?
- M
  Michelle BlackSep 18, 2025
  If the Mitsubishi Electric Inverter triggers a fan alarm, it indicates that the cooling fan is at a standstill or has decelerated. Check for fan failure and contact your sales representative.
E
Eric UnderwoodSep 8, 2025
What causes the electronic thermal relay function pre-alarm on Mitsubishi Electric Inverter, and how to resolve it?
- B
  brandon80Sep 8, 2025
  If the cumulative value of the electronic thermal O/L relay has reached 85% of the Pr. 9 Electronic thermal O/L relay setting or higher on your Mitsubishi Electric Inverter, reduce the load and frequency of operation. Also, set an appropriate value in Pr. 9 Electronic thermal O/L relay.
K
Kristin StrongSep 5, 2025
What to do if Mitsubishi Electric FR-E720-1.5K Inverter shows overcurrent trip during acceleration?
- R
  Rhonda WrightSep 5, 2025
  If the Mitsubishi Electric Inverter experiences overcurrent during acceleration, it indicates that overcurrent has occurred. To resolve this, try the following: Set a longer acceleration time. If 'E.OC1' appears at start, disconnect the motor and restart the inverter. If 'E.OC1' persists, the inverter may be faulty and you should contact your sales representative. Check the wiring for output short circuit and ground fault. When the rated motor frequency is 50Hz, set the Pr. 3 Base frequency to 50Hz. Lower the stall prevention operation level. Activate the stall prevention operation and the fast-response current limit operation (Pr.156). For operations with frequent regenerative driving, set the base voltage in Pr. 19 Base frequency voltage.

Summary

OUTLINE

Product checking and parts identification

Verifies product contents and identifies key parts of the inverter for correct initial setup.

Installation of the inverter and enclosure design

WIRING

Wiring

Explains the fundamental wiring procedures and terminal connections for the inverter and its associated components.

Main circuit terminal specifications

Details the specifications for the main circuit terminals, including power supply, motor, and brake resistor connections.

Control circuit specifications

Outlines the specifications for control circuit terminals, covering input signals, output signals, and communication interfaces.

PRECAUTIONS FOR USE OF THE INVERTER

EMC and leakage currents

Addresses electromagnetic compatibility (EMC) measures and provides guidance on managing leakage currents to prevent interference.

Power-OFF and magnetic contactor (MC)

Precautions for use of the inverter

Offers crucial general precautions for inverter installation, handling, and operation to prevent damage or malfunction.

Failsafe of the system which uses the inverter

Discusses implementing failsafe mechanisms using inverter status output signals to prevent accidents.

PARAMETERS

Operation panel

Details the names and functions of the operation panel buttons and indicators for inverter setup and monitoring.

Parameter list

Provides a comprehensive list of all parameters, their ranges, initial values, and descriptions for inverter configuration.

Control mode

Adjust the output torque (current) of the motor

Limit the output frequency

Frequency setting by external terminals

Setting of acceleration;deceleration time and acceleration;deceleration pattern

Selection and protection of a motor

Covers selecting the correct motor and applying protection measures like overheat protection.

Motor brake and stop operation

Function assignment of external terminal and control

Details how to assign functions to the inverter's input and output terminals for custom control and monitoring.

Monitor display and monitor output signal

Operation selection at power failure and instantaneous power failure

Operation setting at fault occurrence

Explains how to configure retry functions and phase loss protection for handling faults and errors.

Motor noise, EMI measures, mechanical resonance

Frequency setting by analog input (terminal 2, 4)

Misoperation prevention and parameter setting restriction

Selection of operation mode and operation location

Communication operation and setting

Covers communication setup via PU connector, USB, and RS-485, including Modbus RTU.

Special operation and frequency control

Setting from the parameter unit and operation panel

Check and clear of the faults history

TROUBLESHOOTING

Reset method of protective function

Provides methods for resetting protective functions and recovering from faults after corrective actions.

List of fault or alarm indications

Lists all possible fault and alarm indications displayed on the operation panel, with cross-references to their causes and corrective actions.

Causes and corrective actions

Details common causes for error messages, warnings, and faults, along with specific corrective actions to resolve them.

Check first when you have some troubles

Offers initial checks and basic troubleshooting steps for common issues like motor not starting or incorrect speed.

PRECAUTIONS FOR MAINTENANCE AND INSPECTION

Inspection items

Mitsubishi Electric FR-E720-1.5K Specifications

General

Model	FR-E720-1.5K
Series	FR-E700
Input Voltage	200-240 V AC
Power Rating	1.5 kW
Horsepower	2 HP
Input Frequency	50/60 Hz
Protection Class	IP20
Cooling Method	Fan cooled
Control Method	V/f control, Vector control
Protection	Overcurrent, Overvoltage, Overheating
Output Voltage	3-phase, 200-240V AC