If we think that this is the only spurious alarm that may occur with power loss. We know fan rpm also occurs, but the fans do recover when AC returns. Comm errors have occurred, but they seem rare ...
If we think that this is the only spurious alarm that may occur with power loss. We know fan rpm also occurs, but the fans do recover when AC returns. Comm errors have occurred, but they seem rare now; it's unclear whether they stop with AC returning or the operational state. Would we expect other operational impacts of operating from battery, or the loss and return of AC? Battery alarms, etc.?
The block timer runs from the time the condition clears in alarm management (cpld flag, or flag plus alarm state). If alarms are not included here, the timer may (probably will) time out with the alarm still active and the valves still improperly positioned. The valve position error will occur immediately after clearing the alarms, even with the alarms status checked in valves. The timer could be relocated to valves, but that doesn't take care of other sources of alarms after power recovery.
