Samsung MC18AC2-09 Service Manual

Also see for MC18AC2-09: Installation manual Owner's instructions Service manual

Contents

Troubleshooting5-5Samsung Electronics5-2-4 When the UP/DOWN Louver Moter Does Not Operate. (Initial Diagnosis)1) Checklist :(1) Is input voltage normal?(2) Is the UP/DOWN louver motor properly connected with the connector (CN61)?2) Troubleshooting procedure5-2-5 In the mode, When there is no cool air current. Check this first;(1) Is the set temperature of Remote Control lower than room temperature in Cool mode?(2) Is the Indoor PCB properly connected with the CN71 connector?Remove power cord and plug in again in approx. 5 seconds.Is STD lamp blinking?Does operation start when swing button of the remote controlunit pushed?Voltage at pin #58 ~ #61 of micom (ICO4) change?(Squarewave)Volatge at pin #13 ~ #16 of IC06 (ULN2003AFW)change?(Squarewave)UP/DOWN louver motor is faulty.Driver IC06 (ULN2003AFW) is faulty.Micom (IC04) is faulty.NormalCheck as in the procedure "No Powerparts". Refer to page 5-2.After training on, the Cooling operation shouldstart in five minutes.Is the number #33 of Micom (IC04) DC 5.0 V?Is the number checking #10 of IC06 (ULN2003AFW) LOW?RY01 or Cable Check.NOYESNONOYES NormalAbnormal MicomAbnormal IC06PCB should be replaced.YESNONOYESNONOYESYES