Drive Error List - Mitsubishi

Display Name Definition Cause Action
AL.10 Under-Voltage Power supply
voltage dropped to 160VAC or less.
1. Power supply voltage is low Check the power supply.
2. There was an instantaneous control power failure of 60ms or longer.
3. Shortage of power supply capacity caused the power supply voltage to drop at start, etc.
4. The bus voltage dropped to 200VDC.
5. Faulty parts in the servo amplifier Change the servo amplifier.
AL.12 Memory Error 1 RAM, memory fault Faulty parts in the servo amplifier Change the servo amplifier.
AL.13 Clock Error Printed board fault
AL.15 Memory Error 2 EEP-ROM fault 1. Faulty parts in the servo amplifier Change the servo amplifier.
2. The number of write times to EEP-ROM exceeded 100,000.
AL.16 Encoder Error 1 Communication error
occurred between encoder and servo amplifier.
1. Encoder connector (CN2) disconnected. Connect correctly.
2. Encoder fault Change the servo motor.
3. Encoder cable faulty (Wire breakage or shorted) Repair or change cable.
AL.17 Board Error CPU/Parts Fault 1. Faulty parts in the servo amplifier Change the servo amplifier.
The output terminals U, V, W of the servo amplifier and the input terminals U, V, W of the servo motor are not connected. 2. The wiring of U, V, W is disconnected or not connected. Correctly connect the output terminals U, V, W of the servo amplifier and the input terminals U, V, W of the servo motor.
AL.19 Memory Error 3 ROM memory fault Faulty parts in the servo amplifier Change the servo amplifier.
AL.1A Motor Combination
Error
Wrong combination of servo amplifier and servo motor. Wrong combination of servo amplifier and servo motor connected. Use correct combination.
AL.20 Encoder Error 2 Communication error occurred between encoder and servo amplifier. 1. Encoder connector (CN2) disconnected. Connect correctly.
2. Encoder fault Change the servo motor.
3. Encoder cable faulty (Shorted or broken wire) Repair or change cable.
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