Shota San, Have you looked for an A/C system sight glass near the front condenser (radiator)? Often there's a sight glass between the outlet of the condenser and compressor inlet often on the top of the A/C system drier canister. If the compressor engages and you don't see solid liquid then it's low. If the compressor does not engage it's likely a low-pressure cut-off switch preventing it from engaging. Also, there may be an additional low and/or high pressure port in the engine compartment, you can check pressure from.
@@ハマー-x7x Thanks, Much Appreciated. Many of us in America and the rest of the world who love and miss Japan like to think of ourselves as no so much Foreigners to Japan as "Away from our second home" ありがとう、大いに感謝します。 日本を愛し、恋しく思うアメリカやその他の国々の私たちの多くは、私たちが外国人ではなく、「第二の故郷から離れている」と思っています。
What a nice motorhome this is! FYI. Try not to carry a full tank of water to save weight. I always carried only enough water needed before arriving at the destination, where more water was available.