Casablanca ceiling fan, probably mid-80s model

Casablanca ceiling fan, probably mid-80s model with W11 intellitouch, now the thing beeps very loudly about twice per hour. The fan still functions as normal, lights and fan works. Beeping occurs whether the fan is operating or not. Turning the power switch off at the intellitouch control doesn't make any difference. Can't get model # right now since I'm at work, but I figure the solution isn't model specific. Model listed is a guess. Thanks!