FANUC Alarm SRVO-142 — SERVO OHAL1(INV) alarm
Manufacturer wording — SERVO OHAL1(INV) alarm (G:%d A:%d)
The manual prints placeholders; your controller fills them in with the real group, axis or number.
FANUC SRVO-142 (“SERVO OHAL1(INV) alarm”): The servo amplifier overheated. First check: If the robot is overloaded or the duty cycle exceeds specification, this alarm occurs. Likely part: Servo amplifier (Servo amplifier).
Updated 2026-09-17 · LogrobotLM reference
Description
The servo amplifier overheated.
Remedy
If the robot is overloaded or the duty cycle exceeds specification, this alarm occurs. Check the regenerative discharge transistor. Check the thermostat on the servo amplifier after the servo amplifier has cooled. It should not be open. If the problem persists, replace the servo amplifier. Check the controller cabinet fans for blocked filters; clean them if necessary.
Part to check / replace
FANUC SRVO-142 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 →