Designating a controller as main or sub Prerequisite: A remote controller is already connected to the indoor unit. Connect a second controller. After turning on the power, perform setting of the second controller. Result: It will start up automatically. Home screen Wait for a U5, U8 error code to appear on the screen. Screen display explanation 1 main 2 sub U5 1 Home screen When the U5 error code appears, press and hold until “2” appears on the screen. When the U8 error code appears, press and hold until “1” appears on the screen. 2 Result: A controller displaying 1 is set as main, and a controller displaying 2 is set as sub.
INFORMATION If sub remote controller is not set at power-on in the case of one indoor unit controlled by two remote controllers, Error Code: U5 is displayed in the connection checking screen. If the sub remote controller does not display the home screen two minutes after its designation, turn off the power and check the wiring. 14