Mitsubishi Electric MR-J2S-A Error AL.30: Regenerative error

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

Alarm codeAL.30

Regenerative error happens if parameter No. 0 is misconfigured, regenerative brake resistor or option not connected, or excessive regenerative power is applied. The manual's first action is: “Power OFF→ON”

Model
Mitsubishi Electric MR-J2S-A
Display shows
Regenerative error (AL.30)
Type
Alarm code
Source
Manual p. 69

What AL.30 means

Regenerative error p. 200

Common causes

  • 1. Wrong setting of parameter No. 0 p. 200
  • 2. Built-in regenerative brake resistor or regenerative brake option is not connected. p. 200
  • 3. High-duty operation or continuous regenerative operation caused the permissible regenerative power of the regenerative brake option to be exceeded. p. 200
  • 4. Power supply voltage is abnormal. MR-J2S □A:260VAC or more MR-J2S □A:135VAC or more p. 200
  • 5. Built-in regenerative brake resistor or regenerative brake option faulty. p. 200
  • 6. Regenerative transistor fault 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. Set correctly. p. 200
  5. Connect correctly p. 200
  6. ['1. Reduce the frequency of positioning.', '2. Use the regenerative brake option of larger capacity.', '3. Reduce the load.'] p. 200
  7. Review power supply p. 200
  8. Change servo amplifier or regenerative brake option. p. 200
  9. Change the servo amplifier. p. 200

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

If AL.30 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.30; 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.