Samsung AQ12A5(6)MB Service Manual page 22

5-2-4 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 procedure
Remove power cord and plug in again in approx. 5 seconds.
Does operation start when swing button of the remote control
unit pushed?
Voltage at pin #1-#4 of micom (ICO4) change?(Squarewave)
Volatge at pin #13 ~ #16 of IC06 (KID65003)
UP/DOWN louver motor is faulty.
5-2-5 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 should
start in five minutes.
Is the number #18 of Micom (IC04) DC 5.0 V?
Is the number checking #11 of IC06 (KID65003) LOW?
Is the voltage between CN71 #3 and CN71 #5 rating voltage ±10% range
Abnormal 4way valve of Outdoor Unit.
or connecting Cable
4 way valve should be replaced
or connecting Cable Check.
Samsung Electronics
Is STD lamp blinking?
Y
N
Y
change?(Squarewave)
Y
NO
YES
YES
YES
N
Check as in the procedure "No Power
parts". Refer to page 5-2.
Y
N
Micom (IC04) is faulty.
N
Driver IC06 (KID65003) is faulty.
YES
Normal
NO
Abnormal Micom
NO
Abnormal IC06
NO
Abnormal RY73
Troubleshooting
Normal
PCB should be replaced.
5-5