Samsung AQT24A5RE/B Service Manual page 28

5-2-4 When the UP/DOWN Louver Moter 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 procedure
Remove power cord and plug in again in approx. 5 seconds.
Does operation start when swing button of the
Voltage at pin #1-#4 of micom (ICO4) change?(Squarewave)
Volatge at pin #10, #11 of IC06 (KID65003), #15, #16 of IC05
5-2-5 In the Heat 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 and CN78 connector?
After training on, the heating operation should
start in five minutes.
Is the number #43 of Micom (IC04) DC 4.8 V?
Is the number #16 of IC06 (KID65003) LOW? (0V)
Is the voltage between CN71 #5 and CN78 #1 the rating voltage ±10% range?
Abnormal 4way valve of Outdoor Unit.
4 way valve should be replaced
or connecting Cable Check.
Samsung Electronics
Is operating lamp blinking?
YES
remote control unit pushed?
NO
YES
change?(Squarewave)
YES
UP/DOWN louver motor is faulty.
NO
YES
YES
YES
or connecting Cable
NO
Check as in the procedure "No Power parts".
YES
NO
Micom (IC04) is faulty.
NO
Driver IC05 (KID65003) or IC06 is faulty.
YES
Normal
NO
Abnormal Micom
NO
Abnormal IC06
NO
Abnormal RY73
Troubleshooting
Refer to page 5-2.
Normal
Refer to replace PCB module
5-5