Aperture Cover close Timeout fault

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This fault occurs when the GIS commands the Aperture Cover to close and the Aperture Cover fails to close within 135 seconds (2:15). When this occurs this fault is latched. To clear this fault the Aperture Cover must be closed.

This fault most likely occurs when the Aperture Cover drive faults. The below steps will allow the operator to recover from this fault.

1. Return all trapped keys to their original position.

2. Reset Aperture Cover faults in EMCS. CAUTION: Aperture Cover will move when you do this.

3. Wait for Aperture Cover to close.

4. Reset GIS Fault (using Engineering screen of GIS HMI).

5. Reset GIS.

6. Re-open Aperture Cover.

7. Ensure that Aperture Cover drive is not faulted.

8. Re-open M1 Cover.