Well you and the original owner should have received the manuals set for various systems and appliances in the coach. The manual can be obtained for free on line or I will attach a pdf here as well. Page 9 shows the System Menu and below where you were trying to set the clock is another setting to turn it off completely I think. It does help if people buying new or used RV's have some electrical and "handy man (or woman)" experience. At least you can usually fix most of the basic things yourself that way. Good luck on your next adventures.
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