125. Power-on● Check for completion of indoor/outdoor units wiring.● Check for closing of control box lid of indoor and outdoor units before turn on the power.5-1 Followings is displayed after turnon the power."Checking the connection.Please stand by."During above display, backlightdoes not light by button operation.When 1 indoor unit iscontrolled by 2 remotecontrollers:Be sure to set sub remotecontroller during above display.Press and hold for 4 seconds orlonger the Mode Selector buttonof the remote controller to be set.When the display is changed frommain remote controller to subremote controller, the setting iscompleted.5-2 Basic screen is displayed.If sub remote controller is not set at turn on the power inthe case of 1 indoor unit controlled by 2 remotecontrollers, "Error code: U5" is displayed in theconnection checking screen.Select the sub remote controller by pressing the ModeSelector button of either one of the remote controllers for4 seconds or longer.If the Basic screen is not displayed more than 2 minutesafter "Sub RC" display, turn off the power and check thewiring.CAUTIONWhen selecting a different language, refer to "12. Language" on page 23.NOTE 5-1 Checking the connection.Please stand by.Main RCChecking the connection.Please stand by.Error Code: U5Main RC5-1 Checking the connection.Please stand by.Main RCChecking the connection.Please stand by.Error Code: U5Main RCPress and hold for 4 secondsor longer the Mode Selectorbutton of sub remotecontroller side.Checking the connection.Please stand by.Sub RC5-2Fan5-2Fan