5400 — OPTICS error. : It happened following action is not happened in 5 sec. after monitoring scan skip. New scan condition is not set for optical unit on gantry.
Canon Medical (Toshiba) CT error code, reported by the console error system (EMS).
What 5400 means
On Aquilion 16 and Aquilion RX and Aquilion ONE and Aquilion S16 and Asteion Super4 and Activion16 CT systems, status code 5400 indicates: OPTICS error. : It happened following action is not happened in 5 sec. after monitoring scan skip. New scan condition is not set for optical unit on gantry.. The code originates in the Gantry / rotation section of the console error system (EMS). Severity level error (Error condition).
Reported action: Gantry error detected. Turn Gantry off for 5 seconds then turn on to continue. If problem persists call service..
Reported by the Toshiba/Canon CT console error system (errmsg.eng / EMS error message table), shared across the Aquilion, Asteion and Activion CT platforms.
Full troubleshooting for 5400
The complete diagnosis, cause tree, and step-by-step remedy for the Gantry / rotation subsystem are documented in the FSELIB Canon Medical (Toshiba) service manual — re-authored, web-first, with real figures.
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Related Gantry / rotation codes
Related service procedures
Source: errmsg.eng — Toshiba/Canon CT console (EMS) error message table. Reference information re-authored by FSELIB — not a copy of the OEM manual.