Mitsubishi Electric MR-J2S-A Error AL.50: Overload 1

Servo amplifier and motor · taken from the manufacturer’s manual, pages cited

Alarm codeAL.50

Overload 1 indicates servo amplifier output current exceeded continuous limits, system instability, or machine collision. The manual's first action is: “Power OFF→ON”

Model
Mitsubishi Electric MR-J2S-A
Display shows
Overload 1 (AL.50)
Type
Alarm code
Source
Manual p. 69

What AL.50 means

Overload 1 p. 200

Common causes

  • 1. Servo amplifier is used in excess of its continuous output current. p. 200
  • 2. Servo system is unstable and hunting. p. 200
  • 3. Machine struck something. p. 200
  • 4. Wrong connection of servo motor. Servo amplifier's output terminals U, V, W do not match servo motor's input terminals U, V, W. p. 200
  • 5. Encoder faulty. p. 200

What to do

  1. Power OFF→ON p. 200
  2. Press "SET" on current alarm screen. p. 200
  3. Alarm reset (RES) p. 200
  4. 1. Reduce load. 2. Review operation pattern. 3. Use servo motor that provides larger output. p. 200
  5. 1. Repeat acceleration/deceleration to execute auto tuning. 2. Change auto tuning response setting. 3. Set auto tuning to OFF and make gain adjustment manually. p. 200
  6. 1. Review operation pattern. 2. Install limit switches. p. 200
  7. Connect correctly. p. 200
  8. Change the servo motor. p. 200

Before you service the product, read the safety instructions in the manual p. 3.

If AL.50 is still not resolved

  • contact service / dealer p. 3
    “Do not attempt to install, operate, maintain or inspect the servo amplifier and servo motor until you have read through this Instruction Manual, Installation guide, Servo motor Instruction Manual and appended documents carefully and can use the equipment correctly.”
  • contact service / dealer p. 4
    “Do not attempt to wire the servo amplifier and servo motor until they have been installed. Otherwise, you may get an electric shock.”
Open the manual at page 69 All MR-J2S-A error codes Manual details & download

This page summarises what the manufacturer’s manual says about AL.50; each statement links to the page it comes from, and quoted lines are copied word for word. It is not a substitute for the manual or for a qualified installer. ManualLib is not affiliated with Mitsubishi Electric. Found a mistake? Report an error.