Mori Seiki Ex Alarm List May 2026

The Ultimate Guide to the Mori Seiki EX Alarm List: Causes, Solutions, and Prevention

Alarm categories (typical)

• Servo/Axis alarms — (e.g., axis overload, drive fault, following error, encoder error)
  Symptoms: axis stops, abnormal noises, position loss, jitter.
  Typical causes: mechanical binding, excessive cutting force, incorrect tuning, encoder cable issues, blown drive modules, servo amplifier overload.
• Spindle alarms — (e.g., spindle drive fault, spindle overload, spindle encoder error)
  Symptoms: spindle trips, cannot reach commanded RPM, abnormal vibration.
  Typical causes: spindle motor overheating, bearing failure, encoder/cable faults, brake faults.
• Control/CPU/PLC alarms — (e.g., CPU fault, program memory error, battery low)
  Symptoms: control freeze, program lost, improper I/O behavior.
  Typical causes: SD/CF card corruption, power interruptions, aged battery, firmware issues.
• I/O & peripheral alarms — (e.g., tool turret fault, chuck interlock, loader fault, probe fault)
  Symptoms: tool change fails, gripper/chuck not actuating, probe not triggering.
  Typical causes: sensor failures, pneumatic/hydraulic pressure loss, solenoid or valve faults.
• Tool/turret alarms — (e.g., turret indexing fault, clamp/unclamp fault)
  Symptoms: turret refuses to index, mispositioned tools.
  Typical causes: mechanical jam, broken spline, hydraulic/pneumatic failure, encoder or sensor fault.
• Thermal/temperature alarms — (e.g., coolant pump failure, servo over-temp, spindle over-temp)
  Symptoms: thermal shutdown, warning lights, degraded performance.
  Typical causes: coolant low, clogged filters, failed fans, ambient overheating.
• Safety & door/interlock alarms — (e.g., emergency stop, door open, safety circuit fault)
  Symptoms: immediate machine stop, no movement allowed until cleared.
  Typical causes: E-stop pressed, guard open, safety relay or wiring fault.
• Power supply & electrical alarms — (e.g., encoder power, DC bus low, phase loss)
  Symptoms: sudden trips, inability to power drives.
  Typical causes: mains issues, blown fuses, faulty power modules.
• Communication & network alarms — (e.g., fieldbus errors, parameter mismatch)
  Symptoms: axis/drive unresponsive, external devices not responding.
  Typical causes: cable/connector issues, configuration mismatch, module failure.

Part 2: How to Retrieve the Full Mori Seiki EX Alarm List on Your Machine

You do not always need a service manual. If your machine is powered on and you have access to the control panel (standard or maintenance level), you can view the current and historical EX alarm list directly.

6. I/O & Peripheral Alarms

• Alarm: 6001 / DOOR INTERLOCK OPEN

  • Description: Safety door open or switch fault.
  • Typical causes: Door not closed, interlock switch failed.
  • First-line actions: Close door, check interlock switch and wiring.

• Alarm: 6005 / COOLANT PUMP ERROR

  • Description: Coolant pump fault or low flow.
  • Typical causes: Pump failure, clogged lines, low coolant level.
  • First-line actions: Verify coolant level, check pump power and flow, clean filters/strainers.