WATCHDOG_ALARM_2
Watchdog Alarm 2 Issued
Fanuc · αi series AC Servo Motor
What does WATCHDOG_ALARM_2 mean?
A watchdog alarm 2 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
- 1
Turn the power off, then back on
- 2
If this alarm recurs, replace the servo amplifier module
Verified technical data. Last updated: March 2026
Source: Fanuc αi series AC Servo Motor