47TROUBLESHOOTING4-1-5. Exhibition mode setting function1) If Power Freeze Key + Freezer Key are pressed simultaneously for 3 seconds during normaloperation, show room mode will be started with buzzer sound(ding-dong).2) If above Power Freeze & Freezer Key are pressed one more time, show room mode will becanceled.3) If show room mode is selected, blinks "OF-OF" on the temperature setting display of the paneland it indicates the refrigerator has entered the show room mode.4) During show room mode, if fresh food and freezer compartments sensors are higher than 65show room mode will be canceled automatically and freezing operation will be returned.(There is no buzzer sound when the show room mode is canceled by the temperature)5) Operation contents of show room mode- Display, Fan motor and etc operate normally, not to operate compressor only.- Defrost is not operated. (including french heater)- Display function of the initial real temperature is finished.- Under the condition of show room mode, show room mode will be operated when Power Onafter Power OFF.˝ If Power Freeze Key + Freezer Key are pressed for 3 seconds, show room mode willbe started.˝ ˝4-1-6. Option setting functionIf Freezer Key + Fridge Key are pressed simultaneously for 12 seconds during normaloperation, fresh food and freezer compartments temperature display will be changed to optionsetting mode.˝ If Freeze Key + Fridge Key are pressed simultaneously for 12 seconds, optionsetting mode will be started.˝ ˝KEY operation method for changing to option mode