To Next PageTo Next PageWhat to do if Mitsubishi Electric FR-D740-11K 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 Inverter 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 output current detection value exceeded mean on Mitsubishi Electric FR-D740-11K 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 causes a stall prevention (overcurrent) on a Mitsubishi Electric Inverter and how to fix it?
The overcurrent stall prevention on your Mitsubishi Electric Inverter has been activated. To resolve this: * Increase or decrease the Pr. 0 Torque boost setting by 1% and check the motor status. * Set a larger value in Pr. 7 Acceleration time and Pr. 8 Deceleration time. * Reduce the load weight. * Try General-purpose magnetic flux vector control. * Adjust the Pr. 13 Starting frequency setting. * Change the Pr. 14 Load pattern selection setting. * Set the stall prevention operation current in Pr. 22 Stall prevention operation level.
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-D740-11K 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-D740-11K 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).
What causes regenerative overvoltage trip during constant speed on Mitsubishi Electric FR-D740-11K?
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.
What causes motor overload trip on Mitsubishi Electric Inverter?
The electronic thermal relay function in the inverter detects motor overheat due to overload or reduced cooling capability during low-speed operation. To resolve this, reduce the load weight.
General| Model | FR-D740-11K |
|---|---|
| Series | FR-D700 |
| Input Voltage | 3-phase 380-480 V AC |
| Power Rating | 11 kW |
| Horsepower | 15 HP |
| Cooling Method | Forced air cooling |
| Enclosure Rating | IP20 |
| Output Voltage | 0-480 V |
| Frequency Range | 0-400 Hz |
| Control Method | V/F control |
| Overload Capacity | 150% for 60 seconds |
| Protection Features | Overcurrent, overvoltage, undervoltage, overload, short circuit, ground fault, overheating |
| Communication Interfaces | RS-485 |
| Operating Temperature | -10 to 50 °C |
| Storage Temperature | -20 to 65 °C |
| Humidity | 95% RH or less (non-condensing) |
| Altitude | Up to 1000 m |
| Frame Size | FR-D740 |
Diagrams and instructions for connecting power supply, motor, control circuit, and option units to the inverter terminals.
Measures to reduce electromagnetic noise, suppress harmonics, and select appropriate earth leakage current breakers.
General safety guidelines and handling precautions to prevent damage or malfunction of the inverter.
Methods to ensure system safety by providing interlocks using inverter status output signals and backup systems.
A comprehensive list of all inverter parameters, their settings, initial values, and related pages for detailed explanations.
Methods for adjusting motor torque, including manual torque boost and slip compensation for optimal performance.
Guidance on selecting appropriate motors and implementing protection measures like thermal overload and PTC thermistor protection.
Customizing input and output terminals for various functions, including start signals, speed commands, and monitoring.
Procedures for resetting the inverter after a fault or alarm, including power cycle and RES signal reset.
A comprehensive list of error messages, warnings, alarms, and faults displayed by the inverter, with corresponding page references.
Troubleshooting guide for common operational faults and error messages, providing potential causes and solutions.
Initial checks and common causes for issues like motor not starting, abnormal noise, or incorrect speed.
