LIMITED TIME ONLY for new customers: 15% off your first repair order!

Alarm Codes

FANUC Alarm Codes List

Error codes from a CNC machine control indicate a malfunction or failure of an electronic component. Bad ports, low voltage, irregular current, faulty RAM or rising temperatures could trigger an alarm. Understanding these error messages is crucial for maintaining efficient production.

How to Interpret Fanuc Alarms

To troubleshoot FANUC alarm codes, take note of the code shown, including numbers, letters and symbols like hyphens (-) or dots (.). Alarm codes are typically shown on your CNC machine’s control panel or display when an issue occurs. A brief description indicates which component is throwing the alarm:

Use the description on these FANUC alarm code pages to guide your troubleshooting. If you’ve hit a dead end and need further support, please contact us and we’ll help you find the path to a solution.

FANUC Logo These alarm codes apply to:
  • FANUC 6
  • FANUC 10/11/12
  • FANUC 0 (A, B , C & i)
  • FANUC 21 & 21i
  • FANUC 16i & 18i
  • FANUC 16(A, B & C) & 18(A, B & C)
  • FANUC 16(A, B & C) & 18(A, B & C)

Free Fanuc Phone Support For troubleshooting and repairs

Sometimes a malfunctioning CNC machine only needs basic troubleshooting to fix. Tri Star provides FREE phone support for FANUC CNC machines. Call 815-578-9145 for assistance. Our remote tech support can diagnose what’s wrong with your machinery or whether it needs to be sent to us for repairs.

Nationwide Fanuc Repair Services

Tri Star has a nationwide network of field service locations. With multiple states, we drastically cut down on repair turnaround times. Find on-site repairs and maintenance services throughout the country.

Find Service providers in your area for CNC On-Site repairs & maintenance services

Tri-Star's CNC Repair Process

Tri Star CNC representatives will remain in touch with you, providing updates throughout the process.

Get a Quote
Tri Star CNC Building

Fanuc Parts Exchange Online

If a part needs to be replaced, Tri Star has a wide selection of FANUC exchange parts. Our database is searchable by part number or component type. Search for:

Servo amplifier modules DC servo units Spindle amplifier modules AC spindle amplifiers Power suppy modules FANUC controls Printed circuit boards (PCB) I/O modules
Speak with an experienced FANUC technician at Tri Star CNC Services to get to the root of the problem and get it fixed.


Call now for FREE phone support
FREE Phone Support