Mitsubishi Electric FR-E820-0008

Other manuals for Mitsubishi Electric FR-E820-0008

Instruction Manual484 pages

Installation Guideline78 pages

Questions and Answers

G
gregory46Sep 12, 2025
Why does hunting (vibration or acoustic noise) occur in the motor or the machine of my Mitsubishi Electric Inverter?
- O
  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.
J
Jennifer LewisAug 26, 2025
Why is the machine movement unstable with my Mitsubishi Electric FR-E820-0008 Inverter?
- W
  William CantuAug 27, 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.
R
Rebecca WestAug 27, 2025
What to do if Mitsubishi Electric Inverter speed does not accelerate to the command speed?
- A
  Annette MartinAug 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.
K
Kelly TranAug 29, 2025
Why does the motor speed fluctuate with my Mitsubishi Electric FR-E820-0008 Inverter?
- R
  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.
J
Jessica RobbinsAug 30, 2025
Why is the acceleration/deceleration time different from the setting on my Mitsubishi Electric FR-E820-0008 Inverter?
- S
  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.
S
Sandra CastroNov 24, 2025
How to troubleshoot a Mitsubishi Electric FR-E820-0008 Inverter when the motor doesn't rotate?
- C
  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...
P
Patricia KingSep 18, 2025
How to resolve rotation ripple during low-speed operation of Mitsubishi Electric FR-E820-0008 Inverter?
- N
  Nathan GarzaSep 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.
A
Amanda ScottNov 21, 2025
What to do if Mitsubishi Electric FR-E820-0008 Inverter motor does not run at correct speed?
- H
  hebertlisaNov 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...
D
donovanchristianSep 10, 2025
What causes rotation ripple in Mitsubishi Electric Inverter at low speed?
- L
  Laura WagnerSep 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.
F
Fred MendozaSep 7, 2025
Why is the acceleration/deceleration time different on Mitsubishi Electric Inverter?
- D
  Deanna ScottSep 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-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