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Error Code
A7 concerns the louvre rather than the cooling. The swing motor drives the horizontal flap that aims air around the room, and the board tracks where that flap should be. When the motor cannot reach the positions it is told to, the unit reports A7. Cooling and heating usually carry on, which is why the code gets ignored until the flap sticks in one place.
The swing motor is a small geared stepper with plastic internals, and plastic gears are what fail. They strip a tooth, the shaft seizes, or the position contact wears through. It is one of the cheapest parts on the unit and one of the most commonly replaced, particularly where the swing function has been left running for years.
A flap that has been knocked out of its track, has something trapped behind it, or has cracked at the hinge will not complete its travel. The motor pushes against the obstruction, stalls, and the board loses its position reference. With the power off this is easy to feel by hand, which makes it the quickest thing to check.
The swing motor connects to the indoor board through a small plug, and that plug sits behind the louvre assembly where condensate collects. Corrosion on the pins or a plug that has worked loose gives an A7 that appears and disappears with vibration. A flap that moves sometimes and not others is the classic signature.
With the isolator off, the flap is swept slowly from one stop to the other. It should move evenly with no grating and no point where it suddenly frees. Anything caught behind it is removed and a cracked hinge is noted. This one check separates a mechanical jam from an electrical fault in under a minute.
If the flap moves cleanly by hand, the motor is the suspect. These are inexpensive enough that testing and replacing take about the same time, but the flap should still be cycled through its full range after fitting so the board relearns its end stops. Skipping that can leave a new motor reporting the same code.
The swing motor plug is unplugged, inspected for green corrosion and reseated firmly. The harness is followed behind the louvre for a pinch or a rub. On an intermittent A7 this is the first place worth looking, because the plug is exposed to the condensate that runs off the coil and fails far more often than the motor does.
