Mitsubishi Electric FR-E820-0008

Other manuals for Mitsubishi Electric FR-E820-0008

Instruction Manual484 pages

Installation Guideline78 pages

Questions and Answers

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Sandra CastroNov 24, 2025
How to troubleshoot a Mitsubishi Electric FR-E820-0008 Inverter when the motor doesn't rotate?
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  Christopher PachecoNov 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...
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Brandon BentleySep 14, 2025
Why Mitsubishi Electric FR-E820-0008 Inverter motor does not run at the correct speed?
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  Michelle GreenSep 14, 2025
  If your Mitsubishi Electric Inverter motor isn't running at the correct speed, it could be due to: * The speed command from the controller differing from the actual speed, possibly affected by noise. Ensure the speed command is correct and implement EMC measures. You can also lower the setting of Pr.72 PWM frequency selection. * An incorrect setting for the number of encoder pulses. Verify the Pr.369 setting (under Vector control). * A difference between the command speed and the speed recognized by the inverter. Readjust the bias and gain (Pr.125, Pr.126, C2 (Pr.902) to C7 (Pr.905)) of the speed command. * Motor constant variations due to increased motor temperature. Enable online auto-tuning at startup by setting Pr.95 (Pr.574) = "1" (under Real sensorless vector control).
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gregory46Sep 12, 2025
Why does hunting (vibration or acoustic noise) occur in the motor or the machine of my Mitsubishi Electric Inverter?
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  ogreenSep 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.
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Kelly TranAug 29, 2025
Why does the motor speed fluctuate with my Mitsubishi Electric FR-E820-0008 Inverter?
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  Ryan SchwartzAug 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.
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Jessica RobbinsAug 30, 2025
Why is the acceleration/deceleration time different from the setting on my Mitsubishi Electric FR-E820-0008 Inverter?
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  sparksjoanAug 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.
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woodalexanderAug 31, 2025
What causes rotation ripple during low-speed operation on a Mitsubishi Electric FR-E820-0008?
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  Paul HamptonAug 31, 2025
  If rotation ripple occurs during low-speed operation with your Mitsubishi Electric Inverter, it could be due to a high carrier frequency affecting the motor rotation or a speed control gain that is too low. Try setting Pr.72 lower or setting Pr.820 higher.
R
Ryan CoxSep 2, 2025
Why does the motor speed fluctuate on my Mitsubishi Electric FR-E820-0008 Inverter?
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  michael34Sep 2, 2025
  Motor speed fluctuation in your Mitsubishi Electric Inverter can occur due to several reasons. The speed command may be varying, which can be addressed by checking the speed command sent from the controller and implementing EMC measures, setting Pr.72 lower, or setting Pr.822 Speed setting filter 1 higher. Another cause could be torque shortage, requiring you to raise the torque limit. Finally, the speed control gain might not be suitable for the machine, potentially causing resonance; adjust Pr.820 Speed control P gain 1 and Pr.821 Speed control integral time 1 to resolve this.
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Mr. Colin SmithSep 4, 2025
What to do if hunting occurs in Mitsubishi Electric FR-E820-0008 motor?
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  phillipsjessicaSep 4, 2025
  If hunting (vibration or acoustic noise) occurs in the motor or machine connected to your Mitsubishi Electric Inverter, it could be due to several reasons. The speed control gain might be too high, requiring you to set 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 hunting, so check the wiring.
K
Kathleen PachecoSep 15, 2025
Why doesn't the speed accelerate to the command speed in my Mitsubishi Electric FR-E820-0008 Inverter?
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  Susan CarterSep 15, 2025
  If the speed of your Mitsubishi Electric Inverter does not accelerate to the command speed, it may be due to: * Torque shortage or the torque limit operating. Try raising the torque limit or increasing the capacity. * Only P (proportional) control being performed. Speed deviation occurs under P control when the load is heavy, so select PI control.
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Tyler KellySep 12, 2025
What to do if motor speed fluctuates in Mitsubishi Electric FR-E820-0008 Inverter?
- R
  Rachel WaltersSep 13, 2025
  If the motor speed fluctuates with your Mitsubishi Electric Inverter, consider the following: * Check that the speed command sent from the controller is correct and take EMC measures. Also, try setting Pr.72 lower and Pr.822 Speed setting filter 1 higher. * Torque shortage can cause speed fluctuations. Raise the torque limit. * The speed control gain might not be suitable for the machine, potentially causing resonance. Adjust Pr.820 Speed control P gain 1 and Pr.821 Speed control integral time 1.

Mitsubishi Electric FR-E820-0008 Specifications

General

Series	FR-E800
Model	FR-E820-0008
Input Voltage	200-240V AC
Frequency	50/60 Hz
Overload Capacity	150% for 60 seconds
Cooling Method	Fan Cooling
Enclosure Rating	IP20
Output Voltage	200-240V AC
Phase	3-phase
Control Method	V/F control
Protection Features	Overcurrent, overvoltage, undervoltage, overload, overheating, short circuit, ground fault
Ambient Temperature	-10 to +50°C (14 to 122°F)
Storage Temperature	-20 to +65°C (-4 to 149°F)
Humidity	95% RH or less (non-condensing)
Altitude	Up to 1000 m
Vibration	5.9 m/s²