| User Mistake | Manual Correction | | :--- | :--- | | Forgetting to select “FFF” mode for high dose rate | Section 3.4.2: “FFF must be manually enabled per plan. Default is flattened mode.” | | Patient collision due to imager left extended | Section 6.1.1: “Imager will auto-retract at 340° and 20° gantry angles. Do not rely on auto-retract for steep angles.” | | Inability to read backup MU chambers | Troubleshooting Flowchart 4-B: “Swap channels in the Service Console.” | The user manual is also the foundation for competency checklists. Most clinics derive their annual therapist competency exam directly from the manual.
| Error Code | Meaning (from Manual) | Immediate Action | | :--- | :--- | :--- | | | Beam servo off – No dose detected | Check ion chamber connection. Reboot console. | | E-203 | Gantry speed mismatch | Reduce gantry rotation speed to ≤4 deg/sec for VMAT. | | E-415 | MLC leaf position feedback lost | Run MLC calibration (requires physicist). Do not treat. | | F-500 | Imager retract failure | Manually crank the imager arm using the tool in the emergency panel. | elekta versa hd user manual
Remember: Always use the manual revision that matches your machine’s software version. As of 2025, Integrity v.4.4 is the current standard. Bookmark the error code appendix, memorize the emergency beam-off locations, and keep a laminated quick-reference guide at the console. Your patients’ outcomes depend on it. | User Mistake | Manual Correction | |