TroubleshootingSamsung Electronics 1394-3-50 Indoor unit and MCU address duplication errorOutdoor unit display - A00X (X : Address of duplicate indoor unit)Indoor unit displayOperation Defrost Timer Fan Filter/EMI× × ስ ስ ×: ON ስ : Flash ×: OFFJudgment Method Refer to the judgment method below.Cause of problem ∙ Indoor unit and MCU address duplication.1. Cause of problemYesNoMCUIndoor unitHas E108 occurred?E108 occurring machineAfter completely tracking the outdoor unit,check the occurrence of E108.Check the machine where the error occurred in theoutdoor unit display:- If SEG1 is A, an indoor unit; and- If SEG1 is C, MCU.Reset the address of the unit whose address isduplicated.Press the reset key (K3) of the outdoor unit PBA to trackor reset the whole system to rerun.Find a unit whose address is duplicated in the manualaddress view on the view mode of the outdoor unitdisplay. (If there is an address that does not appear inthe manual address view even though a unit is actuallyinstalled, the address is duplicated.)e.g.) When the following is displayed in the view mode atthe site where No. 0 to 4 are installed, possible to judgethat the address of no. 3 indoor unit is duplicated.A000 A001 A002 A004Check the manual address view in the view mode.(Press K4 Switch long to enter)EndCheck the rotary switch of the address ofthe installed MCU to check any duplicate address.K3 reset- When the system is reset through K3 reset, the previous error (E108) on thedisplay is sometimes indicated. This indicates the error left previously in theindoor unit during the course of performing resetting and addressing thewhole system after the outdoor unit is reset.When addressing is completed, the error indication disappears (up to 5minutes required).Whole system power reset- To solve the problem through the power reset after the address is reset thepower reset of individual units is meaningless and the power of the wholesystem must be reset.4-3 Appropriate Measures for Different Symptom (cont.)
