Samsung AS09HPBN Service Manual page 37

Troubleshooting
6-2-6 When the Up/Down Louver Motor 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
Voltage at pin #57~#60 of micom (IC04) change?(Squarewave)
Voltage at pin #2 ~ #3 of CN61(motor connector)
6-2-7 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 connector?
After training on, the heating operation
should start in 5 minutes.
Is the number #38 of Micom (IC04) DC5.0V?
Is the number checking #11 of IC05 (ULN2003A) LOW?
Is the voltage between CN71 #1 and CN71 #5 rating voltage ±10% range
Abnormal 4-Way valve of Outdoor Unit.
4-Way valve should be replaced
or connecting Cable Check.
36
Is STD 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".
Yes
No
Micom (IC04) is faulty.
No
Driver IC05/06 (ULN2003A) is faulty.
Yes
Normal
No
Abnormal Micom
No
Abnormal IC05
No
Abnormal RY73
PCB should be replaced.
Normal
Samsung Electronics