Mori Seiki Ex Alarm List [updated] Jun 2026

What is your machine's (e.g., NLX2500 with MAPPS, DuraTurn, SV-500)? What was the machine doing right when the alarm triggered?

Many EX errors are caused by tripped thermal overloads or circuit breakers inside the main electrical cabinet. Open the cabinet doors safely and inspect the breaker switches. Look for tripped yellow or red indicators on the motor starters for the coolant pumps, hydraulic pumps, and chip conveyors. 4. Clear the Alarm

Bar feeder is out of material, material is jammed, or the emergency stop on the bar feeder was pressed. EX0550: Chip Conveyor Overload

Fix: Check for bent tool pots, incorrectly loaded tool holders (incorrect weight or pull stud), or physical interference in the ATC pocket. mori seiki ex alarm list

| Alarm Code | Description | Probable Cause & Solution | | :--- | :--- | :--- | | | Turret Index Time Over | The turret could not reach the commanded position within the allowed time. • Stalled Motor: Check for mechanical jamming. • Sensor Issues: The turret may have physically locked, but the sensor didn't trigger. Clean the proximity switches. | | E110 | Turret Clamp Alarm | The turret failed to lock into position. • Check the "Turret Lock" proximity switch. • Check hydraulic pressure (if hydraulically clamped). • Mechanical debris between curvic coupling. | | E200 | Tool Post Overload | The live tooling motor (if equipped) or turret drive overloaded. • Check for seized bearings in the tool holder. • Reduce cutting forces. |

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):

The automatic tool changer arm on a machining centre is out of its home position or failed to complete a swap. What is your machine's (e

Mori Seiki CNC machines are famous for their reliability and precision. However, when an EX alarm appears on your MSG or MAPPS control panel, production grinds to a halt. Unlike NC alarms (which relate to core Fanuc or Mitsubishi control system faults), EX alarms are external system alarms defined by Mori Seiki. They signal issues with the machine's peripheral hardware, safety switches, fluid levels, and mechanical systems.

| 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 following list compiles some of the most frequently reported EX alarms across various Mori Seiki models, based on real-world user experiences and documented solutions. Open the cabinet doors safely and inspect the

The alarm list is an essential resource for Mori Seiki EX machine users, as it:

When an EX alarm halts your Mori Seiki machine, follow this structured troubleshooting approach to minimize downtime: 1. View the Alarm Detail Screen

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