Information / dialogXC (X-ray Controller)

B2500000 — XC NACK — X-ray Controller returned a negative acknowledgment

Canon Medical (Toshiba) CT error code, reported by the XC (X-ray Controller).

What B2500000 means

On Aquilion RX / V4-62R004 and V3.20R003 and Aquilion ONE / V4.2 and Aquilion S16 and Asteion Super4 and Aquilion 16 CT systems, status code B2500000 indicates: XC NACK — X-ray Controller returned a negative acknowledgment. The code originates in the XC (X-ray Controller) section of the XC (X-ray Controller). Severity level 1 (Information / dialog).

Reported action: Repeat the exposure and note whether the NACK appears on every attempt or only now and then. If it persists, have the XC (X-ray Controller) link checked — cable, connectors and supply — by your service representative. The OEM table gives no detail beyond the NACK itself, so the pattern you record (protocol, timing, how reproducible it is) is what service will work from..

Reported on Aquilion 16, Aquilion RX/V4-62R004, Aquilion ONE/V4.2, Aquilion S16, Asteion Super4 and V3.20R003. It comes from the 4:Device XC table, where the OEM text reads "Error in XC ( XC NACK )" — the X-ray Controller answered a command with a negative acknowledgment instead of accepting it.

Full troubleshooting for B2500000

The complete diagnosis, cause tree, and step-by-step remedy for the XC (X-ray Controller) subsystem are documented in the FSELIB Activion16 (TSX-031A) service manual — re-authored, web-first, with real figures.

Open the Activion16 service manual

Related XC (X-ray Controller) codes

B2100000Abnormal XC (X-ray Controller) statusB2300000X-ray exposure condition prohibitedB2600000X-ray overcurrent detected by the XCB2610000Over kV — tube voltage above the allowed value (XC)B2620000Over mA — tube current above the allowed value (XC)B2630000Exposure time exceeded — X-ray timing alarm from the XCB2910000Arc occurred during the previous scan (XC)B2F00000Time-out in the XC (X-ray Controller)

Related service procedures

Run the console malfunction-diagnosis program (hwtest)Console (Diagnostics)Run the independent MHR PWB test (diagnostics) from the RTM terminalConsole (Diagnostics)Remove the host PC unit (PX74-07959 GR-1/GR-2)Console (Operation)Remove the host PC unit (PX74-08766 GR-1/GR-2)Console (Operation)Remove and install an RDD disk/power-supply unit (Rorke Data)Console (Recon)Remove and install an RDD fan unit (Rorke Data)Console (Recon)
Discuss B2500000 with other field engineers in the FSELIB forum

Source: errmsg.eng — 4:Device XC table. Reference information re-authored by FSELIB — not a copy of the OEM manual.