TroubleshootingSamsung Electronics12-1112-3-6 Indoor float switching errorNote : E3 error should be released when indoor unit power is reset.NoNoNoNoNoReplace the indoor unit PCBReplace the drain pumpReplace the drain pumpReplace the indoor unit PCBYesYesYesYesYesYesReset the indoor unit powerand check the drain pump operationNormal operationNormal operationCheck the floating switch is bad.Reset the indoor unitpower after replaceIs the resistance value āwhen measuring the resistance valueof two terminal after taking out the floatingswitch connector connected to indoorunit PCB? (Open status)Is much the water of drain pan ?Does the drain pump operate?Does the water level decrease?Is the same error occurred?Is the terminalvoltage of drain pump PCB aboutAC220V?Re-assembly the floating switchconnector and perform the reset ofoutdoor power(Required the reset ofindoor unit power)NoOutdoor unit displayIndoor unit displayHow to determineReason of error(Indoor float switching error )(Operation) (Timer) (Airflow) (Filter)The status continues over 1 minute that indoor unit float switch is opened.The rising of water level of drain pan due to the disorder of indoor unit drain pump,the badness of detection sensor