25 CFR §547.10

1. (a)Fault events.
   1. (1)The following are fault events that must be capable of being recorded by the Class II gaming system:
   2. (2)The occurrence of any event identified in paragraph (a)(1) of this section must be recorded.
   3. (3)Upon clearing any event identified in paragraph (a)(1) of this section, the Class II gaming system must:
      1. (i)Record that the fault condition has been cleared;
      2. (ii)Ensure the integrity of all related accounting data; and
      3. (iii)In the case of a malfunction, return a player's purchase or wager according to the rules of the game.
2. (b)Door open/close events.
   1. (1)In addition to the requirements of paragraph (a)(1) of this section, the Class II gaming system must perform the following for any component affected by any sensored door open event:
      1. (i)Indicate that the state of a sensored door changes from closed to open or opened to closed;
      2. (ii)Disable all financial instrument acceptance, unless a test mode is entered;
      3. (iii)Disable game play on the affected player interface;
      4. (iv)Disable player inputs on the affected player interface, unless test mode is entered; and
      5. (v)Disable all financial instrument disbursement, unless a test mode is entered.
   2. (2)The Class II gaming system may return the component to a ready to play state when all sensored doors are closed.
3. (c)Non-fault events. The following non-fault events are to be acted upon as described below, if applicable: