Service Manual - Quietside

4-5 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 procedureTurn off the breaker and turn it on after 30 secondsCheck outdoor unit terminalblock voltage on each N-R,N-S,N-T(230Vac nominal)NormalAbnormalCheck AC power source.Reconnect wires correctlyCheck outdoor unit terminalblock voltage on L-N for indoor unit(230Vac nominal)NormalAbnormalCheck Inner wiring of outdoor unitCheck indoor unitterminal block voltage on L-N(230Vac nominal)AbnormalCheck cable and connection of wire betweenindoor and outdoor unitNormalCheck indoor unitterminal block voltage on V1-V2(12Vdc nominal)AbnormalCheck Indoor controlPCB, Transformer, and FUSE on PCB andreplace one which is broken.NormalCheck DC power voltage ofremote controller(V1,V2)AbnormalCheck cable and connection of wire betweenremote controller and indoor unitNormalPress the On/Off button on thewired remote controller to operate the airconditionerNo displayCheck DIP SW in thewired remote controller.No displayWrong settingReplace wired remote controllerSet DIP SW correctlyCorrectIs there any error display onthe wired remote controllerYesCheck each item according to error code listNoCheck the setting temperatureSamsung Electronics 4-17CH£ª£ª£ªCAV_USA_30520_SM_N.indd 17 2009-2-18 17:33:43