Alarm codeAL.46
Servo motor overheat occurs when ambient temperature exceeds 40°C, motor is overloaded, or encoder thermal sensor fails. The manual's first action is: “Power OFF→ON”
- Model
- Mitsubishi Electric MR-J2S-A
- Display shows
- Servo motor overheat (AL.46)
- Type
- Alarm code
- Source
- Manual p. 69
What AL.46 means
Servo motor overheat p. 200
Common causes
- 1. Ambient temperature of servo motor is over 40°C (104°F). p. 200
- 2. Servo motor is overloaded. p. 200
- 3. Thermal sensor in encoder is faulty. p. 200
What to do
- Power OFF→ON p. 200
- Press "SET" on current alarm screen. p. 200
- Alarm reset (RES) p. 200
- Review environment so that ambient temperature is 0 to 40°C (104°F). p. 200
- 1. Reduce load. 2. Review operation pattern. 3. Use servo motor that provides larger output. p. 200
- Change servo motor. p. 200
Before you service the product, read the safety instructions in the manual p. 3.
If AL.46 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.”
This page summarises what the manufacturer’s manual says about AL.46; 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.