All of those persons who have IBIS conditioners on top of their caravans, ask yourselves this question. "Is this air conditioner working as good as I expect?"
I had mine checked today, believing that it required regassing. because the E4 notation came up on the dial. A check revealed the thermostat wire had not been positioned away from return fan. It was indicating a 10 deg C difference to the actual temp.
By relocating the the thermo wire, the problem was fixed.
