Faldic MHT259a (RYS-L type) Error Codes

23 codes from pages 322–333 of the manual

This is the list of alarm codes the Faldic manual gives for the MHT259a (RYS-L type) AC Servo System. Find your code below and open it for what the manual says about its causes and what to do.

Alarm codes from p. 326

CodeWhat it meansPage
AL SE System error p. 326
AL OC Overcurrent, output overcurrent p. 332
AL Lu Low voltage, undervoltage p. 326
AL HU High voltage, overvoltage p. 326
AL ET Encoder trouble p. 332
AL CE Circuit trouble, amplifier trouble p. 326
AL dE Data error, memory error p. 332
AL Fb Fuse brown p. 333
AL-H2 Resistor heat 2 p. 331
AL EC Encoder communication error p. 330
ALCE Cont (control signal) error p. 326
AL OL Over load, motor overheating p. 326
AL rH Resistor heat, braking (DB) resistor overheat p. 330
AL OF Overflow, deviation excessive p. 331
AL AH Amp heat, amplifier overheating p. 330
AL EH Encoder heat, encoder overheating p. 331
AL RL Absolute data lost p. 326
AL RF Absolute data overflow p. 326
AL EE Terminal error p. 326
AL AL Absolute value data of the 16-bit serial encoder built in GYC/GYS type motor are lost. p. 327
AL CEE One and the same signal is allocated to several control input signal (CONTn) terminals on CN1 of amplifier. p. 329
AL Ct Contents of alarm p. 332
AL 05 The motor speed has exceeded 1.1 times of the max. speed p. 333

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