Spindle orientation or indexing has taken too long.
This article provides a complete Mori Seiki EX alarm list, categorized by machine series (NL, DuraTurn, NH, NMV, etc.), along with root causes, step-by-step troubleshooting, and preventive measures.
The tailstock quill or body is not in the correct position or lacks pressure against the part.
EX alarms stand for . They indicate that the CNC control itself is working fine, but an external condition required for safe operation has not been met. These alarms are programmed by Mori Seiki via the ladder logic to protect the operator, the workpiece, and the machine components. mori seiki ex alarm list
Verify that pneumatic regulators read 0.5 MPa (approx. 72 PSI) and hydraulic systems maintain their specified target pressures.
This comprehensive guide breaks down the most common Mori Seiki EX alarm codes, what they mean, and how to troubleshoot them safely to minimize your shop's downtime. Understanding Mori Seiki Alarm Categories
"EX" stands for . These alarms are configured by Mori Seiki's software engineers to notify the operator of issues within the machine peripherals, safety devices, or operational errors, such as: Door interlocks Tool turret malfunctions Tailstock issues Hydraulic pressure failure ATC (Automatic Tool Changer) failures 2. Common Mori Seiki EX Alarm List & Solutions Spindle orientation or indexing has taken too long
Way lube reservoirs (ensure they are topped off with the correct ISO VG 68 or 220 oil).
Look for “ALARM LIST – EXTERNAL ALARMS”. Usually chapter 7 or 12.
| 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. | EX alarms stand for
Triggered when the way lube reservoir is empty or the lubrication pump fails to build adequate pressure within a set time cycle.
If you are dealing with a specific error code not covered in this guide, let me know the and your Mori Seiki machine model . I can help you look up the precise PMC diagnostic signal or guide you through targeted troubleshooting steps for that issue. Share public link
Use the DIAGNOSIS button to look at PMC -> PMCPRM -> DATA to find which switch is causing the alarm.
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This guide is designed to help operators and maintenance technicians understand the alarm structure, common codes, and troubleshooting steps for Mori Seiki EX lathes (typically running on Mori Seiki MS/MSC or Fanuc-based controls).