Mitsubishi Electric MR-J2S-A Error AL.33: Overvoltage

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

Alarm codeAL.33

Overvoltage alarm indicates voltage exceeds limits, possibly due to incorrect regenerative brake settings or lack of regenerative brake option. The manual's first action is: “Flickers at occurrence of the alarm.”

Model
Mitsubishi Electric MR-J2S-A
Display shows
Overvoltage (AL.33)
Type
Alarm code
Source
Manual p. 69

What AL.33 means

Overvoltage p. 161

Common causes

  • Indicates the occurrence of overvoltage (AL.33). p. 161
  • 1. Regenerative brake option is not used. p. 161
  • 2. Though the regenerative brake option is used, the parameter No. 0 setting is "00□□ (not used)." p. 161
  • 3. Lead of built-in regenerative brake resistor or regenerative brake option is open or disconnected. p. 161
  • 4. Regenerative transistor faulty. p. 161
  • 5. Wire breakage of built-in regenerative brake resistor or regenerative brake option p. 161
  • 6. Capacity of built-in regenerative brake resistor or regenerative brake option is insufficient. p. 161
  • 7. Power supply voltage high. p. 161
  • 8. Ground fault occurred in servo amplifier output phases U, V and W. p. 161

What to do

  1. Flickers at occurrence of the alarm. p. 161
  2. Power OFF→ON p. 161
  3. Press "SET" on current alarm screen. p. 161
  4. Alarm reset (RES) p. 161
  5. Use the regenerative brake option. p. 161
  6. Make correct setting. p. 161
  7. 1. Change lead. 2. Connect correctly. p. 161
  8. Change servo amplifier p. 161
  9. 1. For wire breakage of built-in regenerative brake resistor, change servo amplifier. 2. For wire breakage of regenerative brake option, change regenerative brake option. p. 161
  10. Add regenerative brake option or increase capacity. p. 161
  11. Review the power supply. p. 161
  12. Correct the wiring. p. 161

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

If AL.33 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.33; 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.