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When the engine goes into active safing, all lights will be lit up and will blink until the safing procedure is complete. This provides feedback to the operator for when the network link goes down.
Nominal Usage
The following steps describe the engine mode during a nominal test:
- The engine controller is connected and powered on, defaulting to disabled mode with all valves closed
- All solenoids are electrically connected, but there is no fuel in the engine. The controller is placed in test mode and all valves, indicator lights, and igniters are tested.
- The engine is placed into cold mode and the filling process begins. All personnel are evacuated except for the minimum needed for filling.
- The engine is fueled and pressurized, then the controller is placed into hot mode. All personnel are evacuated.
- The engine test is loaded in the ground station and the countdown clock is begun, a hold can be initiated for any pre-test checks as well.
- The engine completes a test fire, the data is verified and the engine is placed into cold mode.
- Any remaining fuel is emptied by the minimum personnel, then the engine is placed in disabled mode.
- The engine controller is shutdown and disconnected.