Samsung SH09ZS8 - Page 90

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TROUBLESHOOTING
8
Troubleshooting for Non Inverter Cooling Only (12K) (Cont.)
◆ 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.
Is operating 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), #10~#12 of
IC08 (ULN2003A) change?(Squarewave)
UP/DOWN louver motor is faulty.
Driver IC06/08 (ULN2003A) is faulty.
Micom (IC04) is faulty.
Normal
Check as in the procedure
"No Power parts".
YES
YES
YES
NO
NO
NO
NO
YES
◆ 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.
Is the munber #38 of Micom (IC04) DC 5.0 V?
Is the munber checking #11 of IC05 (ULN2003A) LOW?
RY7I or Cable Check.
NO
YES
NO
NO
YES
Normal
Abnormal Micom
Abnormal IC05
PCB should be replaced.
DB98_08187A(1)_57~100 3/27/03 2:24 PM Page 89