Mitsubishi Electric MR-J2S-A Error Codes

47 codes from pages 69–371 of the manual

This is the list of error, alarm codes the Mitsubishi Electric manual gives for the MR-J2S-A servo amplifier and motor. Find your code below and open it for what the manual says about its causes and what to do.

Error codes from p. 206

CodeWhat it meansPage
88888 Watchdog p. 206
[A] Normal operation p. 288
[B] Parity error p. 288
[C] Checksum error p. 288
[D] Character error p. 288
[E] Command error p. 288
[F] Data No. error p. 288
Y4A ABS data check sum error p. 371
Y4B ABS coordinate error p. 371

Alarm codes from p. 161

CodeWhat it meansPage
AL.12 Memory error 1 p. 200
AL.13 Clock error p. 200
AL.15 Memory error 2 p. 200
AL.17 Board error p. 200
AL.19 Memory error 3 p. 200
AL.37 Parameter error p. 200
AL.8A Serial communication timeout p. 200
AL.8E Serial communication error p. 200
AL.30 Regenerative error p. 200
AL.33 Overvoltage p. 161
AL.10 Undervoltage p. 200
AL.45 Main circuit device p. 200
AL.46 Servo motor overheat p. 200
AL.50 Overload 1 p. 200
AL.51 Overload 2 p. 200
AL.24 Main circuit error p. 200
AL.32 Overcurrent p. 200
AL.31 Overspeed p. 200
AL.35 Command pulse frequency alarm p. 200
AL.52 Error excessive p. 200
AL.16 Encoder error 1 p. 200
AL.1A Monitor combination error p. 200
AL.20 Encoder error 2 p. 200
AL.25 Absolute position erase p. 200
A2 Indicates that the third alarm in the past is undervoltage (AL.10) p. 161
A3 Indicates that the fourth alarm in the past is overspeed (AL.31) p. 161
A4 Indicates that there is no fifth alarm in the past p. 161
E 01 Indicates that the data of parameter No. 1 is faulty p. 161
AL.92 Watchdog p. 200
AL.96 Open battery cable warning p. 200
AL.9F Battery warning p. 200
AL.E0 Excessive regenerative warning p. 200
AL.E1 Overload warning p. 200
AL.E3 Absolute position counter warning p. 200
AL.E5 ABS time-out warning p. 200
AL.E6 Servo emergency stop warning p. 200
AL.E9 Main circuit off warning p. 200
AL.EA ABS servo-on warning p. 200

Codes and descriptions are taken from the manufacturer’s manual; page numbers link to the PDF. ManualLib is not affiliated with Mitsubishi Electric. Found a mistake? Report an error.