Mitsubishi Electric FR-A840-01160 (45K) User Manual (English)

Questions and Answers:

D
Danielle BurtonAug 17, 2025
What to do if hunting occurs in Mitsubishi Electric FR-A840-01160 (45K) motor?
- J
  Jonathan GrahamAug 17, 2025
  If hunting (vibration or acoustic noise) occurs in the motor or machine connected to your Mitsubishi Electric Inverter, it might be due to a speed control gain that is too high. Try performing easy gain tuning or setting Pr.820 lower and Pr.821 higher. Alternatively, the torque control gain could be too high. In this case, set Pr.824 Torque control P gain 1 (current loop proportional gain) lower. Finally, incorrect motor wiring can also cause this issue, so ensure that the wiring is correct.
D
daniel86Aug 25, 2025
What to do if Mitsubishi Electric FR-A840-01160 (45K) Inverter speed does not accelerate to the command speed?
- C
  Carmen RamosAug 26, 2025
  If the speed of your Mitsubishi Electric Inverter does not accelerate to the command speed, it may be due to a torque shortage or the torque limit is operating. To resolve this, try raising the torque limit or increasing the capacity. Also, ensure that you are using PI control instead of only P (proportional) control.
L
Lisa TownsendAug 28, 2025
Why does Mitsubishi Electric FR-A840-01160 (45K) Inverter motor speed fluctuate?
- J
  Jason KelleyAug 28, 2025
  If the motor speed connected to your Mitsubishi Electric Inverter fluctuates, it could be due to several reasons. First, verify that the speed command sent from the controller is correct and implement EMC measures, and set Pr.72 lower. Another possible cause is a torque shortage, in which case you should raise the torque limit. If the speed control gain is not suitable for the machine, resulting in resonance, perform easy gain tuning.
L
lynntonySep 1, 2025
Why acceleration/deceleration time different from setting in Mitsubishi Electric Inverter?
- I
  ian39Sep 1, 2025
  If the acceleration or deceleration time of your Mitsubishi Electric Inverter is different from the setting, it could be due to a torque shortage, so try raising the torque limit. Alternatively, the load inertia might be too high, therefore set acceleration/deceleration time suitable for the load.
M
martinjacobSep 5, 2025
Why is machine movement unstable with Mitsubishi Electric FR-A840-01160 (45K)?
- S
  Samantha StewartSep 5, 2025
  If the machine movement connected to your Mitsubishi Electric Inverter is unstable, it could be because the speed control gain is not suitable for the machine. Perform easy gain tuning to correct this. It could also be that the response is slow due to the inverter's acceleration/deceleration time setting, so set the optimum acceleration/deceleration time.
M
Mrs. Kimberly PetersSep 8, 2025
How to fix rotation ripple during low-speed operation in Mitsubishi Electric FR-A840-01160 (45K)?
- A
  aimee38Sep 9, 2025
  If rotation ripple occurs during the low-speed operation of your Mitsubishi Electric Inverter, it might be due to a high carrier frequency affecting the motor rotation. Try setting Pr.72 lower. Another possible cause is that the speed control gain is too low, so try setting Pr.820 higher.

Mitsubishi Electric FR-A840-01160 (45K) Specifications

General

Model	FR-A840-01160 (45K)
Series	FR-A800
Rated Motor Capacity (kW)	45
Rated Output Power	45 kW
Input Frequency	50/60 Hz
Cooling Method	Forced air cooling
Ambient Humidity	5 to 95% RH (non-condensing)
Enclosure Rating	IP20
Input Voltage	3-phase 380-480 V AC
Output Voltage	380-480 V AC
Output Frequency	0.2 to 590 Hz
Overload Capacity	150% for 60 seconds
Protection Features	Overcurrent, Overvoltage, Overheat, Ground fault
Communication Interfaces	RS-485
Operating Temperature	-10 to +50°C
Storage Temperature	-20 to +65 °C (-4 to +149 °F)
Altitude	1000 m or below

Summary

Chapter 2 INSTALLATION AND WIRING

2.1 Peripheral devices

Details essential peripheral devices required for inverter installation and operation, including reactors and brake units.

2.3 Installation of the inverter and enclosure design

Explains how to design the inverter enclosure considering factors like heat generation and environmental conditions.

2.4 Terminal connection diagrams

Illustrates the wiring diagrams for connecting the main and control circuits, including options and external signals.

2.5 Main circuit terminals

2.6 Control circuit

2.8 Connection to a motor with encoder (Vector control)

CHAPTER 3 PRECAUTIONS FOR USE OF THE INVERTER

3.1 Electro-magnetic interference (EMI) and leakage currents

Discusses EMI phenomena, leakage currents, and countermeasures like EMC filters and proper wiring.

3.2 Power supply harmonics

3.4 Power shutdown and magnetic contactor (MC)

3.6 Checklist before starting operation

Provides a comprehensive checklist for peripheral circuit making, operation/handling methods, and safety precautions before starting the inverter.

3.7 Failsafe system which uses the inverter

CHAPTER 4 BASIC OPERATION

4.1 Operation panel (FR-DU08)

Details the components of the operation panel and provides instructions for its mounting and basic operation.

4.2 Monitoring the inverter

4.3 Easy setting of the inverter operation mode

4.5 Basic operation procedure (PU operation)

Guides through basic operations like setting frequency and starting the inverter using the operation panel.

4.6 Basic operation procedure (External operation)

Explains how to perform basic operations using external signals for start commands and frequency commands.

4.7 Basic operation procedure (JOG operation)

CHAPTER 5 PARAMETERS

5.1 Parameter list

Provides a comprehensive list of all parameters, their initial values, setting ranges, and related pages for reference.

5.2 Control method

Explains the available control methods: V/F control, Advanced magnetic flux vector control, Real sensorless vector control, Vector control, and PM sensorless vector control.