To Next PageTo Next PageWhat to do if Mitsubishi Electric FR-D740-0.4K shows PU disconnection?
This function stops the inverter output if communication between the inverter and PU is suspended. Connect the parameter unit cable securely.
What to do if Mitsubishi Electric FR-D740-0.4K has overcurrent trip during acceleration?
If the inverter output current reaches or exceeds approximately 200% of the rated current during acceleration, the protective circuit activates and shuts off the inverter output. You can increase the acceleration time. If "E.OC1" is always lit at starting, disconnect the motor and start the inverter. Check for output short-circuit/ground fault and set 50Hz in Pr. 3 Base frequency.
What causes Mitsubishi Electric Inverter overload trip and how to fix it?
The inverter output stops if the temperature of the output transistor element exceeds the protection level when a current not less than the inverter rated current flows and overcurrent trip does not occur (200% or less). To resolve this, increase the acceleration/deceleration time.
What does it mean when my Mitsubishi Electric FR-D740-0.4K shows an inverter overload trip?
An inverter overload trip on your Mitsubishi Electric Inverter means the electronic thermal relay function, which protects the inverter elements, has been activated. To resolve this, try increasing the acceleration/deceleration time, adjusting Pr. 0 Torque boost setting, setting Pr. 14 Load pattern selection appropriately, reducing the load, or ensuring the surrounding air temperature is within the specified limits.
What does output current detection value exceeded mean on Mitsubishi Electric FR-D740-0.4K Inverter?
This function is activated when the output current exceeds the Pr. 150 Output current detection level setting. Check the settings of Pr. 150 Output current detection level.
What to do if my Mitsubishi Electric FR-D740-0.4K Inverter is showing overcurrent trip during constant speed?
If your Mitsubishi Electric Inverter is showing an overcurrent trip during constant speed operation, make sure the load is stable. Also, check the wiring for any output short circuits or ground faults. Try lowering the stall prevention operation level and activating both the stall prevention operation and the fast-response current limit operation (Pr.156).
How to resolve analog input fault on Mitsubishi Electric Inverter?
An analog input fault appears if voltage(current) is input to terminal 4 when the setting in Pr.267 Terminal 4 input selection and the setting of voltage/current input switch are different. Give a frequency command by current input or set Pr. 267 Terminal 4 input selection, and voltage/current input switch to voltage input.
What happens when Mitsubishi Electric FR-D740-0.4K Inverter has output phase loss?
If one of the three phases (U, V, W) on the inverter's output side (load side) is lost during inverter operation, the inverter stops the output. Ensure that the cables are wired properly.
What to do if my Mitsubishi Electric FR-D740-0.4K Inverter shows overcurrent trip during deceleration or stop?
If your Mitsubishi Electric Inverter shows an overcurrent trip during deceleration or at a stop, try these steps: Increase the deceleration time. Check the wiring, looking for output short circuits or ground faults. Verify that the mechanical brake isn't activating too early. Also, consider lowering the stall prevention operation level and activating the stall prevention operation and the fast-response current limit operation (Pr.156).
What causes regenerative overvoltage trip during constant speed on Mitsubishi Electric FR-D740-0.4K?
If regenerative energy causes the inverter's internal main circuit DC voltage to reach or exceed the specified value, the protective circuit is activated to stop the inverter output. Ensure that you keep load stable.
General| Model | FR-D740-0.4K |
|---|---|
| Series | FR-D700 |
| Type | Inverter |
| Rated Output Capacity (kVA) | 0.9 |
| Motor Capacity (kW) | 0.4 |
| Input Voltage | 3-phase 380 to 480 V |
| Output Voltage | 3-phase 380 to 480 V |
| Frequency Range | 1 to 400 Hz |
| Protection Level | IP20 |
| Overload Capacity | 150% for 60 seconds |
| Output Power | 0.4 kW |
| Output Current | 2.0 A |
| Rated Output Current (A) | 2.0 A |
| Control Method | V/F control, vector control |
| Protection Features | Overcurrent, Overvoltage, Undervoltage, Overheating |
Addresses leakage currents and countermeasures, including to-earth and line-to-line leakage, and EMC measures.
General safety precautions for handling, wiring, and operating the inverter to prevent damage or accidents.
Explains how to implement interlocks using inverter status output signals for system safety.
A comprehensive list of all parameters, their settings, and related pages for quick reference.
Details on adjusting torque boost, slip compensation, and stall prevention for optimal motor performance.
Details on setting acceleration/deceleration times and selecting patterns like linear or S-pattern.
Guidance on selecting motors and implementing protection like overheat protection and auto-tuning.
Details on assigning functions to input and output terminals, including MRS, safety stop, and others.
Covers automatic restart and power-failure deceleration stop functions for reliable operation.
Details on retry functions, phase loss protection, and earth fault detection for fault handling.
Details on reset selection, PU disconnection detection, parameter write disable, and password functions.
Instructions on how to check and clear the inverter's fault history.
Details on how to reset the inverter's protective functions after a fault occurs.
A comprehensive list of fault and alarm codes, their meanings, and corresponding pages for details.
Troubleshooting guide for common error messages, warnings, and faults with their causes and corrective actions.
