47TROUBLESHOOTING4-1) Function for failure diagnosis● If Energy Saver Key + Fridge/Power Cool Key on the front of panel are pressed simultaneouslyfor 8 seconds , it will be changed to the test mode and all displays on the front of panel will be off.● If any key on the front of panel is pressed within 15 seconds after the test mode, it will beoperated as below sequence :manual operation(fresh food compartment) ª manual defrost of fresh food compartment(rd) ªmanual defrost of fresh food and freezer compartments (Fd) ª Cancel(Display all off).● If any key on the front of panel is not pressed within 15 seconds after the test mode, the testmode will be canceled and it will be returned to previous mode.1) Manual operation function˝ If Energy Saver Key + Fridge/Power Cool Key are pressed simultaneously for8 seconds, (displays are all off)It will be changed to the test mode (manual operation) by pressing any key4-1-1. Test mode (manual operation / manual defrost function)1-1) If any key is pressed once in test mode, blinks "FF" on the display and it indicates therefrigerator has entered the manual operation. At this moment, buzzer beeps as analarm.1-2) If manual operation is selected, compressor will run at once without 5 minutes delay inany mode. If the refrigerator is on the defrost cycle at the moment, defrost will befinished and manual operation will begin.(Be careful if manual operation get started at the moment of compressor off, over loadcould be occurred)1-3) If manual operation works, compressor & f-fan operate continuously for 24 hours andfresh food compartment will be controlled by the setting temperature.1-4) When the manual operation runs, setting temperature will be selected automatically asbelow: freezer compartment -14×(-25), fresh food compartment 33.8×(1).1-5) During manual operation, Power Freeze & Power Cool function will not be worked.If a function is selected, the power function icon of the selected function will be offautomatically after 10 seconds.1-6) Manual operation can be canceled during manual operation by turning on the applianceafter power off(reset) or choosing the step 4) test cancel mode.1-7) Alarm(0.25 sec ON/ 0.75 sec OFF) will beep continuously until manual operation iscompleted and there is no function to make the sound stop.˝˝˝˝