I would say your refer is damaged. The level requirement has to do with the liquid ammonia being able to fall via gravity. Without it the ammonia liquid will not flow to the evaporator coils. Having your RV off level disrupts the proper flow of the ammonia and allows ammonia crystals to form in the tubes. The crystals accumulate until flow is restricted or blocked. The problem with these crystals is that you can't dissolve them.
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Lt Keefer
2018 Hurricane 29M
CHF, Saf-T-Plus, SumoSprings
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