EL
ErrorLib
Brands
||
  1. Home
  2. Fanuc
  3. Alpha i series AC Servo Motor
  4. WATCHDOG_ALARM_1
About·Privacy·Terms

ErrorLib — Industrial Fault Code Library

Disclaimer: ErrorLib is an independent technical reference tool. While we aim for accuracy, always verify with the manufacturer’s official service manuals before performing maintenance on industrial equipment. ErrorLib is not affiliated with the brands listed.

WATCHDOG_ALARM_1

Watchdog Alarm 1 Issued

Fanuc · Alpha i series AC Servo Motor

What does WATCHDOG_ALARM_1 mean?

A watchdog alarm 1 was issued, indicating a system malfunction where the internal watchdog timer detected a deviation from expected operation. This is typically a severe internal error, pointing to a critical processor or software issue.

Common Causes

  • Internal system malfunction causing a watchdog timer error

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Turn the power off, then back on

  2. 2

    If this alarm recurs, replace the servo amplifier module

Browse all codes in this manual (60)
Verified technical data. Last updated: April 2026

Related Faults

000Power-Down Required Parameter011Zero Feedrate Specified013Maximum Feedrate Zero
Source: Fanuc Alpha i series AC Servo Motor
Open Manual (Page 231)Search more codes in this manual