Mori Seiki Ex: Alarm List

To appreciate the EX Alarm List, one must first distinguish it from standard system alarms. A system alarm, often displayed as a numeric code (e.g., 1020, 2001), originates directly from the CNC controller (typically a Fanuc, Mitsubishi, or Siemens unit) and indicates a problem with the core control logic—such as an overloaded servo, a broken encoder, or a loss of reference position. These alarms are generic across many machine brands using the same controller.

EX Alarms, however, are unique to the machine builder. The "EX" stands for External or, more accurately, Machine Builder-Specific Alarm. These alarms are programmed by Mori Seiki’s engineers within the ladder logic (PLC) of the machine. They monitor the peripheral systems—coolant pumps, chip conveyors, hydraulic units, door interlocks, tool changers, and lubrication systems. When an operator sees an alarm like “EX1040 SPINDLE UNIT LUBRICATION LOW,” this is not a generic controller alarm but a custom message created by Mori Seiki to pinpoint a condition specific to their machine’s design.

Entry-level Dura series share simpler alarms: mori seiki ex alarm list

| Alarm Code | Probable Cause | Immediate Action | | :--- | :--- | :--- | | EX1402 | Hydraulic unit pressure low | Check hydraulic pump motor breaker. Inspect for oil leaks. Add hydraulic oil. | | EX1411 | Lubrication pressure low (way lube) | Fill way lube reservoir. Check lube pump solenoid. | | EX1425 | Hydraulic filter clogged | Replace hydraulic return line filter element. | | EX1440 | Spindle chiller unit flow fault | Check coolant level in chiller. Clean chiller pump strainer. | To appreciate the EX Alarm List, one must

For any machinist, setup technician, or maintenance engineer running a Mori Seiki (now DMG MORI) CNC lathe or machining center, few things are as jarring as a sudden halt in production accompanied by a cryptic EX alarm on the control panel. Unlike standard CNC machine alarms (which often relate to servo overloads or program errors), EX alarms are machine manufacturer-specific. They are the machine tool builder’s way of telling you about a hardware limit, a missing input signal, or a safety violation.

In the world of DMG MORI service documentation, the term “Mori Seiki EX Alarm List” is searched thousands of times each month by engineers desperate to decode a flashing "EX 1050" or "EX 1402." Alarm: 9005 / SAFETY CIRCUIT FAULT

This article serves as a complete reference guide. We will break down what EX alarms are, how to access them, the most common alarm numbers by machine series (NLX, NH, DuraTurn, etc.), their probable causes, and step-by-step solutions.

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.