Samsung Electronics 4-184-5 Fault Diagnosis by Symptom4-5-1 No Power(completely dead) - Initial diagnosis1. Checklist :1) Is Power source voltage normal?2) Is AC power linked correctly? ( miss-wiring, wire detaching etc. )3) Is any LED on the MAIN PCB of Outdoor unit lit?4) Is terminal voltage for indoor unit normal? (230Vac nominal)5) Is Wired remote controller installed correctly?2. Troubleshooting procedureYesYesYesYesYesYesYesNoCheck outdoor unit terminalblock voltage on each N-R,N-S,N-T(230Vac nominal)Check outdoor unit terminalblock voltage on L-N for indoor unit(230Vac nominal)Check indoor unit terminalblock voltage on L-N(230Vac nominal)Check indoor unit terminalblock voltage on V1-V2(12Vdc nominal)Press the On/Off button onthe wired remote controller to operate theair conditionerCheck DC power voltage of remotecontroller(V1,V2)Check DIP SW in the wired remote controllerIs there any error display on the wiredremote controllerTurn off the breaker and turn it on after 30 secondsCheck AC power source. Reconnect wires correctly.Check Inner wiring of outdoor unit.Check cable and connection of wire betweenindoor and outdoor unit.Check Indoor control PCB, Transformer,and FUSE on PCB and replace one which is broken.Check cable and connection of wire betweenremote controller and indoor unit.Replace wired remote controller.Set DIP SW correctly.Check each item according to error code list.Check the setting temperatureNoNoNoNoNoNoNoNoNS090SDXEA_E_SM_33623A(1)_1.indd 18 2011-04-08 �� 10:55:29