Robotics in Manufacturing
SRVO-133

SRVO-133: FSAL (PS) alarm (power supply fan stopped)

The cooling fan for the power supply's control circuit has stopped.

What it means

The cooling fan for the power supply's control circuit has stopped. Simple ladder: fan first, power supply second.

Common causes

Ranked by what technicians most often find, most likely first.

  1. Failed or jammed αiPS cooling fan.
  2. Failed power supply (αiPS).

How to fix it

  1. Check the fan; replace if abnormal.
  2. Replace the power supply if a good fan doesn't clear it. Power-cycle to clear.

Quick facts

Category
Servo
Affected series
R-30iB; R-30iB Mate; R-30iB Plus; R-30iB Mate Plus
Alarm family
SRVO

Related codes

Verified against FANUC documentation (B-83284EN-1).Last reviewed: 2026-07-09.Editorial process