The Mitsubishi MR-J2-200CT is a specialized AC servo amplifier commonly used in precision motion control. When a fault occurs, the drive displays a two-digit alarm code on its integrated display. Understanding these codes is essential for minimizing downtime and preventing hardware damage.
Similar to AL.51 but triggered at a lower threshold, warning of a potential full overload shutdown. mitsubishi mr-j2-200ct alarm list
Check if the regenerative resistor is connected correctly or if its resistance value is correct. AL 31 – Overspeed The motor speed exceeded the maximum rated speed. Check the speed command for sudden spikes. Verify that the electronic gear ratio is set correctly. Check the motor wiring (U, V, W) for incorrect phases. AL 32 – Overcurrent The Mitsubishi MR-J2-200CT is a specialized AC servo
Software Reset: Use Mitsubishi setup software (such as MR Configurator) to clear the fault. Similar to AL