Samsung WALL MOUNTED TYPE Technical Manual page 116

When the UP/DOWN Louver Moter Does Not Operate. (Initial Diagnosis)
1) Checklist :
(1) Is input voltage normal? (input 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 remote control unit
pushed?
Voltage at pin #1-#4 of micom (ICO4) change?(Squarewave)
Volatge at pin #16, #15 of IC06, #10, #11 of IC05 (KID65003)
117
Troubleshooting
Is operating lamp blinking?
Y
N
Y
change?(Squarewave)
Y
UP/DOWN louver motor is faulty.
N
Check as in the procedure "No Power parts".
Y
Normal
N
Micom (IC04) is faulty.
N
Driver IC05 (KID65003) or IC06 is faulty.