koppel KV24 ODU-ARF21C Service Manual page 24

Features
1.7 Built-in display board
 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 remote 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)
22
Remote Controller (Optional)
Display
Indoor Units