Samsung AS12SGGE Training Manual page 80

Troubleshooting for Non Inverter Cooling Only
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.
Is STD lamp blinking?
Does operation start when swing button of the
remote control unit pushed?
Voltage at pin #57~#60 of micom (ICO4)
change?(Squarewave)
Volatge at pin #16 of IC06 (ULN2003A) and #10~#12 of
IC08 (ULN2003A) change?(Squarewave)
UP/DOWN louver motor is faulty.
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?
After training on, the Cooling operation
should start in five minutes.
NO
Is the munber #38 of Micom (IC04) DC 5.0 V?
YES
Is the munber checking #11 of IC05 (ULN2003A) LOW?
RY7I or Cable Check.
NO
YES
YES
NO
NO
YES
NO
YES
YES
NO
NO
TROUBLESHOOTING
(7K/9K)
(Cont.)
Check as in the procedure
"No Power parts".
Normal
Micom (IC04) is faulty.
Driver IC06/08 (ULN2003A) is faulty.
Normal
Abnormal Micom
Abnormal IC05
PCB should be replaced.
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