FANUC Alarm SRVO-373 — OPEMG2 status abnormal
Error- Hardware
- emergency stop and dual safety chains
- Controllers
- R-30iA / R-30iB
- FANUC class
- SERVO
- Hardware family
- FANUC emergency stop, pendant and dual safety chain alarms
FANUC SRVO-373 (“OPEMG2 status abnormal”): A chain alarm was detected with the emergency stop switch on the operator's panel. First check: 1. Replace the panel board. Likely part: Teach pendant (Teach pendant) +1 more.
Updated 2026-10-22 · LogrobotLM reference
Description
A chain alarm was detected with the emergency stop switch on the operator's panel.
Remedy
1. Replace the panel board. 2. Replace the teach pendant cable. 3. Replace the teach pendant. 4. Replace the emergency stop button on the operator's panel.
Field diagnosis
Chain alarm on channel 2 of the operator panel emergency stop button.
What to check
- Same sequence as SRVO-372: board, teach pendant cable, teach pendant, button; main board as a last resort, after backup.
- Note: Both channels faulted together point to the board rather than the button.
Part to check / replace
FANUC SRVO-373 points to the hardware below — start here before ordering.
Tap a part for every code that points to it — and verify the exact variant for your controller before ordering.
Related codes
Same hardware involved
Indicative field information — the robot manufacturer's manual and safety procedures always prevail. Never bypass a safety device; apply lockout/tagout (LOTO) before any physical intervention. How this reference is built →