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FANUC Alarm PAIN-355 — WARN Estat HVON Failed

FANUC PAIN-355 (“WARN Estat HVON Failed”): The robot sent the HVON signal to the electrostatic controller, but did not get a HVON signal back from the electrostatic unit. First check: Make sure the Electrostatic controller and the Process I/O rack have power, check the wiring between the Robot controller and the Electrostatic controller.

Updated 2026-09-17 · LogrobotLM reference

Description

The robot sent the HVON signal to the electrostatic controller, but did not get a HVON signal back from the electrostatic unit.

Remedy

Make sure the Electrostatic controller and the Process I/O rack have power, check the wiring between the Robot controller and the Electrostatic controller.

Related codes

PAIN-353WARN Estats disabledPAIN-354WARN Estat controller not in remotePAIN-356WARN Estat setpoint not reachedPAIN-357WARN Estat T.P. enable Timeout

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 →