Samsung AM18A1(B1)E09 Service Manual page 33

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 pro c e d u re
Remove power cord and plug in again in approx. 5 seconds.
Does operation start when swing button of the remote con-
Voltage at pin #33-#36 of micom (ICO4)
Volatge at pin #10, #11, #12, #13 of IC05 (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 munber #60 of Micom (IC04) DC 4.8 V?
Is the munber #15 of IC07 (KID65003) LOW?
Is the voltage between CN71 #3 and RY71 NO
Abnormal 4way valve of Outdoor Unit.
4 way valve should be replaced
or connecting Cable Check.
Samsung Electronics
Is operating lamp blinking?
Y
trol unit pushed?
N
change?(Squarewave)
Y
change?(Squarewave)
Y
NO
YES
YES
AC198~264?
3
YES
or connecting Cable
Y
Check as in the procedure "No Power
parts". Refer to page 5-2.
Y
Normal
N
Micom (IC04) is faulty.
N
Driver IC05 (KID65003) is faulty.
YES
Normal
NO
Abnormal Micom
NO
Abnormal IC07
NO
Abnormal RY73
Troubleshooting
PCB should be replaced.
5-5