Mori Seiki Ex Alarm List !!top!! Jun 2026

Mori Seiki machine "EX" alarms generally refer to (Machine Alarms) defined by Mori Seiki rather than the standard NC alarms provided by the control manufacturer like Fanuc . These codes typically signal issues with peripheral machine functions such as sensors, door interlocks, hydraulics, and tool changers. Common EX Alarm Categories

Main pneumatic pressure supply has dropped below 0.4–0.5 MPa.

: General error related to the operator panel or its power supply. EX0491 - Spindle Speed Abnormal

If the message is vague, look at the Diagnostic (DGNOS) bits. Mori Seiki manuals often list specific bits that trigger these alarms. mori seiki ex alarm list

Mori Seiki are machine-specific (external) alarms typically defined by the machine tool builder rather than the CNC control manufacturer (like Fanuc or Mitsubishi). These often relate to peripheral equipment or physical machine states. Mori Seiki EX Alarm categories and specific codes include: Common EX Alarm Codes EX0001 (Thermal Relay Tripped):

| Alarm Code | Description | Probable Cause & Solution | | :--- | :--- | :--- | | | Hydraulic Motor Overload | The hydraulic pump motor drew too much current. • Check the hydraulic oil level (is it low?). • Check for clogged suction filters. • Check the thermal breaker in the electrical cabinet. | | E003 | Hydraulic Pressure Drop | System pressure dropped below the set threshold while the pump was running. • Check for leaks in the lines. • Check the pressure switch setting. • Pump may be worn out. | | E004 | Lubrication Oil Low | The way lube reservoir is empty. • Refill the way oil (typically Mobil Vactra #2). • Check the float switch if the tank is full but the alarm persists. | | E005 | Lubrication Cycle Error | The system did not detect a pressure rise during the lube cycle. • Check if the lubrication pump is working. • Check for blocked lines or a broken distributor block. |

The operator or an external peripheral (like a bar feeder) has triggered an E-stop button. This cuts power to the servo drives. 3. Chuck, Tailstock, and Workholding Alarms Mori Seiki machine "EX" alarms generally refer to

CNC machines rely heavily on hydraulic and pneumatic pressure. When these drop below safe thresholds, EX codes prevent mechanical damage.

The most reliable way to get the complete alarm list for your specific machine is through its official documentation.

Note: exact alarm codes vary by EX model and control type (Mori Seiki/OI-T/Oi-F/Oi-TF or later FANUC/Siemens variants). Use the machine’s alarm manual for exact code meanings. Below are representative examples and first-step actions. : General error related to the operator panel

: The tool turret moved without an explicit command from the NC. Check the turret's physical clamp signal or the output driver board.

The automatic way-lube system failed to build up or vent pressure within the programmed time limit.

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I can provide the specific diagnostic parameters, keep relays, or sensor adjustments needed to clear that exact fault. Share public link

On Fanuc-based Mori Seiki controls, press the SYSTEM key, then the PMC softkey, and look for PMCDGN (Diagnostics) or STATUS .