Should I use my split type air conditioner and ceiling or pedestal fan at the same time?I'm heard, if I'm turn on air conditioner and ceiling or pedestal fan same time it is harmful for air conditioner. Its true or false? My another question is does sun and rain damaged split air conditioner outdoor unit? If yes how can I protect it? Please reply me. Thanks.

I urge you to use some simple common sense to answer your own questions.

I would venture a guess that 90% of newer homes have air and ceiling fans. Mine do. Central units are rarely protected and the smaller split is no different.