61TROUBLESHOOTING4-1-2. Display function of Communication error2-1) When you press any key one more time at Fridge off Forced Operation [OF r], rd lights up on the DisplayPanel. At this time, the Forcd Operation stops immediately and R-Defrost will be performed at the sametime.2-2) When you press any key one more time at Forced R-Defrost [rd], Fd lights up on the Display Panel. At thistime, FR-Defrost will be performed at the same time.2-3) At this time, it will send out “Beep” sound for 2 seconds and then it will perform Forced F/R Defrost whilesending out “0.5 sec On and 0.5 sec Off” sound.2) Forced Defrost3-1) During the simultaneous defrosting of fresh food and freezer compartments, if the display panel change tothe test mode and test button is pressed one more time, defrosting of fresh food and freezercompartments will be canceled and the unit will return to the normal operation.Or, all test functions will be canceled by turning main power ON and OFF.3) Test cancel mode1-1) If there is no answer for 10 seconds after the panel micom received the requirement of communication,"PC- Er or PC-Ch" display on the panel PCB will be ON/OFF alternately until the communication error iscanceled. (0.5 sec ALL ON, 0.5 sec ALL OFF alternately)1-2) “PC- Er or PC-Ch” display on the Panel Display will be ON/OFF alternately until the communication error iscanceled. (0.5 sec ALL ON, 0.5 sec ALL OFF alternately)1) Display function when Panel ↔ MAIN MICOM communication has error2-1) ”oP-Er or oP-Ch” code is repeatedly ON/OFF until Option error settles down.2) Display function when Panel ↔ MAIN MICOM OPTION has error