Mitsubishi Electric FR-E840-0016

Other manuals for Mitsubishi Electric FR-E840-0016

Instruction Manual484 pages

Installation Guideline78 pages

Questions and Answers

C
Calvin RussellSep 12, 2025
Why does hunting (vibration or acoustic noise) occur in the motor or the machine of my Mitsubishi Electric FR-E840-0016 Inverter?
- A
  Alejandro McneilSep 12, 2025
  Hunting in your Mitsubishi Electric Inverter's motor or machine can occur due to several reasons: * The speed control gain might be too high. Try setting Pr.820 lower and Pr.821 higher. * The torque control gain might be too high. Try setting Pr.824 Torque control P gain 1 (current loop proportional gain) lower. * The motor wiring might be incorrect. Verify the wiring.
C
colejesseAug 26, 2025
Why is the machine movement unstable with my Mitsubishi Electric FR-E840-0016 Inverter?
- C
  Caleb HessAug 26, 2025
  If the machine movement is unstable, it could be due to the speed control gain not being suitable for the machine or a slow response due to the inverter's acceleration/deceleration time setting. Try adjusting Pr.820 and Pr.821 or setting the optimum acceleration/deceleration time.
M
Michael HillAug 27, 2025
What to do if Mitsubishi Electric FR-E840-0016 speed does not accelerate to the command speed?
- K
  Karina TurnerAug 27, 2025
  If the speed does not accelerate to the command speed, it could be due to torque shortage, causing the torque limit to operate, or because only P (proportional) control is performed. To resolve this, try raising the torque limit or increasing the capacity. If only P control is being performed, select PI control, as speed deviation occurs under P control when the load is heavy.
A
Adam HendersonAug 29, 2025
Why does the motor speed fluctuate with my Mitsubishi Electric FR-E840-0016 Inverter?
- E
  Evan MarksAug 29, 2025
  If the motor speed fluctuates, it may be due to variations in the speed command, torque shortage, or a speed control gain that is not suitable for the machine, potentially causing resonance. Check that the speed command sent from the controller is correct and take EMC measures. You can also try setting Pr.72 lower and Pr.822 Speed setting filter 1 higher. Additionally, raising the torque limit might help. If the speed control gain is the issue, adjust Pr.820 Speed control P gain 1 and Pr.821 Speed control integral time 1.
J
Jeremy SmithAug 30, 2025
Why is the acceleration/deceleration time different from the setting on my Mitsubishi Electric FR-E840-0016?
- B
  Brian HernandezAug 30, 2025
  If the acceleration/deceleration time is different from the setting, it could be caused by torque shortage or a load inertia that is too high. To solve this, raise the torque limit or set an acceleration/deceleration time suitable for the load.
A
alan62Nov 23, 2025
How to troubleshoot a Mitsubishi Electric Inverter when the motor doesn't rotate?
- A
  Abigail ObrienNov 24, 2025
  If the motor does not rotate in vector control, there could be several causes: * Incorrect motor wiring: Check the wiring. Select V/F control (set "9999" in Pr.80 Motor capacity or Pr.81 Number of motor poles, and "40" in Pr.800 Control method selection) and check the motor rotation direction. When the SF-V5RU (1500 r/min series) motor is used, set Pr.19 Base frequency voltage to 170 V (340 V) for the 3.7 kW motor or lower, and to 160 V (320 V) for the motor whose capacity is higher than 3.7 kW, and set Pr.3 Base frequency to 50 Hz. When a forward signal is input, rotation in the counterclockwise direction as viewed from the motor shaft direction is correct. (If the motor rotates clockwise, the phase sequence of the inverter secondary side wiring is incorrect.) * Incorrect encoder typ...
A
Alexandra GriffinSep 18, 2025
How to resolve rotation ripple during low-speed operation of Mitsubishi Electric Inverter?
- B
  Brenda MooreSep 18, 2025
  To resolve rotation ripple during low-speed operation of your Mitsubishi Electric Inverter: * A high carrier frequency may be affecting the motor rotation. Try setting Pr.72 lower. * The speed control gain might be too low. Set Pr.820 higher.
C
Christina PachecoNov 21, 2025
What to do if Mitsubishi Electric FR-E840-0016 motor does not run at correct speed?
- C
  Chad ThompsonNov 21, 2025
  If the motor does not run at the correct speed, and the command speed and actual speed differ, it could be due to several reasons. First, check that the speed command sent from the controller is correct and take EMC measures if noise is affecting the speed command. You may also need to lower the setting of Pr.72 PWM frequency selection. Second, ensure that the setting for the number of encoder pulses (Pr.369) is correct under Vector control. Third, if the command speed and the speed recognized by the inverter are different, adjust the bias and gain (Pr.125, Pr.126, C2 (Pr.902) to C7 (Pr.905)) of the speed command again. Finally, if the motor constant varies due to an increase in the motor temperature, enable the online auto-tuning at startup by setting Pr.95 (Pr.574) = "1" under Real senso...
M
Margaret WilliamsSep 10, 2025
What causes rotation ripple in Mitsubishi Electric FR-E840-0016 Inverter at low speed?
- P
  pbellSep 10, 2025
  Rotation ripple during low-speed operation with a Mitsubishi Electric Inverter can be caused by a high carrier frequency affecting the motor rotation. Try setting Pr.72 lower. Alternatively, the speed control gain might be too low; in this case, set Pr.820 higher.
K
Kevin RodriguezSep 7, 2025
Why is the acceleration/deceleration time different on Mitsubishi Electric FR-E840-0016?
- T
  Tracey MoralesSep 7, 2025
  If the acceleration/deceleration time on your Mitsubishi Electric Inverter differs from the setting, it could be due to torque shortage. In this case, raise the torque limit. Alternatively, the load inertia might be too high, requiring you to set an acceleration/deceleration time suitable for the load.

Mitsubishi Electric FR-E840-0016 Specifications

General

Model	FR-E840-0016
Series	FR-E800
Category	Inverter
Manufacturer	Mitsubishi Electric
Input Voltage	200-240V AC
Input Phase	3-phase
Output Voltage	0-240V AC
Enclosure Rating	IP20
Control Method	Vector Control
Protection Features	Overcurrent, Overvoltage, Undervoltage, Overheat
Communication Interfaces	RS-485, Ethernet (optional)
Operating Temperature	-10 to +50°C
Storage Temperature	-20 to +65°C
Ambient Humidity	95% RH or less (non-condensing)
Vibration Resistance	5.9 m/s² (0.6 G) at 10 to 55 Hz
Cooling Method	Fan Cooling