Samsung AQ12A2VC Service Manual

Also see for AQ09A2VA: Owner's instructions & installation manual

123-2-4 When the UP/DOWN Louver Motor Does Not Operate. (Initial Diagnosis)1) Checklist :(1) Is input voltage normal? (the rating voltage ±10% range)(2) Is the UP/DOWN louver motor properly connected with the connector (CN61)?2) Troubleshooting procedureRemove power cord and plug in again in approx. 5 seconds.Is operating lamp blinking?Does operation start when swing button of the remote controlunit pushed?Voltage at pin #33-#36 of micom (ICO4) change?(Squarewave)Volatge at pin #10, #11, #12, #13 of IC05 (KID65003)change?(Squarewave)UP/DOWN louver motor is faulty.Driver IC05 (KID65003) is faulty.Micom (IC04) is faulty.NormalCheck as in the procedure "No Powerparts". Refer to page 5-2.3-2-5 In the mode, When there is no warm air current. Check this first;(1) Is the set temperature of Remote Control lower than room temperature in Heat mode?(2) Is the Indoor PCB properly connected with the CN71 connector?After training on, the heating operation shouldstart in five minutes.Is the munber #48 of Micom (IC04) DC 4.8 V?Is the munber #12 of IC07 (KID65003) LOW?Is the voltage between CN71 #3 and RY71 NO 3the rating voltage ±10% range?Abnormal 4way valve of Outdoor Unit.or connecting Cable4 way valve should be replacedor connecting Cable Check.NOYESYESYESNONONOYES NormalAbnormal MicomAbnormal IC07Abnormal RY73PCB should be replaced.