Mitsubishi Electric FR-F820-04750 User Manual

Mitsubishi Electric FR-F820-04750

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INDUSTRIAL AUTOMATION

MITSUBISHI ELECTRI

C

MITSUBISHI ELECTRI

C

FR-F800

Inverter

Instruction Manual

FR-F820-00046(0.75K) to 04750(110K)

FR-F840-00023(0.75K) to 06830(315K)

FR-F842-07700(355K) to 12120(560K)

Art. no.: 292550

03 12 2015

Version B

Version check

Table of Contents

Questions and Answers:

A
Amber CohenAug 8, 2025
Why is my Mitsubishi Electric FR-F820-04750 motor vibrating?
- S
  Sabrina HernandezAug 8, 2025
  If the motor or machine connected to your Mitsubishi Electric Inverter vibrates or produces acoustic noise (hunting), it could be due to several reasons. The speed control gain might be too high, so try setting Pr. 820 "Speed control P gain 1" lower and Pr. 821 "Speed control integral time 1" higher. Alternatively, the torque control gain could be too high; in that case, set Pr. 824 "Torque control P gain 1 (current loop proportional gain)" lower. Also, check the motor wiring to ensure it is correct.
B
Brandon JohnsonAug 12, 2025
What to do if Mitsubishi Electric FR-F820-04750 speed does not accelerate to the command speed?
- M
  Michelle SanfordAug 12, 2025
  If your Mitsubishi Electric Inverter motor isn't reaching the commanded speed, it could be due to a torque shortage activating the stall prevention. Try raising the stall prevention operation level. Another potential solution involves increasing the capacity. Also, ensure that you're using PI control instead of just P (proportional) control.
G
Gina OwensAug 16, 2025
Why does the Mitsubishi Electric FR-F820-04750 motor speed fluctuate?
- J
  Jennifer ThomasAug 16, 2025
  If your Mitsubishi Electric Inverter motor speed fluctuates, first verify that the speed command sent from the controller is correct and implement EMC measures. You may need to lower Pr. 72 "PWM frequency selection". Increasing Pr. 822 "Speed setting filter 1" may also help. If there is a torque shortage, raise the stall prevention operation level. If the speed control gain isn't suitable for the machine, adjust Pr. 820 "Speed control P gain 1" and Pr. 821 "Speed control integral time 1".

Mitsubishi Electric FR-F820-04750 Specifications

General

Brand	Mitsubishi Electric
Model	FR-F820-04750
Category	Inverter
Language	English

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