Midea CTBU-09HWFN1-M Service Manual page 14

2.3.1.7 Built-in Display Board
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The standard indoor unit can be controlled by wired controller.

There is a display board with a receiver in the E-box. Move out the display, and fix it in other place,
even in the distance of 2m. The unit will realized remoter control.

The wired controller and the display board can display the error code or production code when the
chips detect some failure.
Wired Controller (Standard)
Remote Controller (Optional)
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Display