SRVO-251
Servo Amplifier Internal DB Relay Abnormal
Fanuc · R-30iB Mate + Mate Plus Robot
What does SRVO-251 mean?
An abnormality has been detected in the internal DB (Dynamic Braking) relay of the servo amplifier. This indicates a fault within the amplifier's internal circuitry responsible for dynamic braking.
Repair Steps
- 1
Replace the servo amplifier.
- 2
Replace the E-stop unit.
Verified technical data. Last updated: March 2026
Source: Fanuc R-30iB Mate + Mate Plus Robot