Mitsubishi Electric 800 Series Assembly & Installation Guidelines

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INVERTER

FR-A800-E

INSTALLATION GUIDELINE

FR-A870-02300-E, 02860-E

800

CONTENTS

INSTALLATION AND INSTRUCTIONS ................................................................................1

WIRING................................................................................................................................4

FAILSAFE OF THE SYSTEM WHICH USES THE INVERTER...............................................18

PRECAUTIONS FOR USE OF THE INVERTER....................................................................19

BASIC OPERATION ...........................................................................................................21

TROUBLESHOOTING........................................................................................................38

SPECIFICATIONS ..............................................................................................................41

APPENDIX ........................................................................................................................44

Thank you for choosing this Mitsubishi Electric Inverter.

This Installation guideline and the enclosed CD-ROM give handling information and precautions for use of this

product.

Do not use this product until you have a full knowledge of the equipment, the safety information and the

instructions.

Please forward this Installation guideline and the CD-ROM to the end user.

Version check

Art. No.: 405010

14 01 2019

Version A

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Hardware Instruction Manual148 pages

Questions and Answers:

C
christopherbergAug 29, 2025
Why is the machine movement unstable with my Mitsubishi Electric 800 Inverter?
- G
  ginaduarteAug 29, 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.
E
evan85Aug 27, 2025
Why is my Mitsubishi Electric 800 motor vibrating?
- A
  Anthony MccormickAug 27, 2025
  If hunting (vibration or acoustic noise) occurs in the motor or the machine, it might be due to a speed control gain or torque control gain that is too high, or incorrect motor wiring. Try setting Pr.820 lower and Pr.821 higher, or setting Pr.824 Torque control P gain 1 (current loop proportional gain) lower. Also, check the wiring.
B
Brittany JohnsonAug 27, 2025
How to reset protective functions on a Mitsubishi Electric Inverter?
- P
  Priscilla MartinezAug 27, 2025
  To reset the protective functions on your Mitsubishi Electric Inverter, you can press the STOP/RESET key on the operation panel. Note that this can only be done when a fault has occurred.
S
Sue Richardson MDAug 26, 2025
How to retain fault output signal in Mitsubishi Electric 800 Inverter?
- K
  kennethmitchellAug 26, 2025
  To retain the fault output, opening the magnetic contactor (MC) provided on the input side of the inverter at a fault occurrence shuts off the control power to the inverter.
C
Christian KimAug 25, 2025
What to do if Mitsubishi Electric 800 Inverter shows fault or alarm?
- M
  Mr. Patrick Green MDAug 26, 2025
  When a protective function activates, take appropriate corrective action. After that, reset the Mitsubishi Electric Inverter and resume operation.

Mitsubishi Electric 800 Series Specifications

General

Series	800 Series
Type	Inverter
Frequency Range	0.1 to 400 Hz
Power Range	0.4 kW to 560 kW (Varies by model)
Overload Capacity	150% for 60 seconds, 200% for 3 seconds
Control Method	V/F Control
Communication	RS-485
Protection Functions	Overcurrent, Overvoltage, Undervoltage, Ground fault, Short circuit
Storage Temperature	-20 to +65°C
Humidity	95% RH or less (non-condensing)
Enclosure Rating	IP20
Braking Unit	Built-in or External (depending on model)
Cooling Method	Fan cooling