Samsung AQ07ACVE, Service Manual

Page: 33 / 56

Troubleshooting
5-5
Samsung Electronics
5-2-4 When the UP/DOWN Louver Moter Does Not Operate. (Initial Diagnosis)
1) Checklist :
(1) Is input voltage normal? (198-264V~)
(2) Is the UP/DOWN louver motor properly connected with the connector (CN61)?
2) Troubleshooting procedure
5-2-5 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?
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 #33-#36 of micom (ICO4)
change?(Squarewave)
Volatge at pin #10, #11, #12, #13 of IC05 (KID65003)
change?(Squarewave)
UP/DOWN louver motor is faulty.
Driver IC05 (KID65003) is faulty.
Micom (IC04) is faulty.
Normal
Check as in the procedure "No
Power parts". Refer to page 5-2.
After training on, the heating opera-
tion should start in five minutes.
Is the number #60 of Micom (IC04) DC 4.8 V?
Is the number #15 of IC07 (KID65003) LOW?
Is the voltage between CN71 #3 and RY71 NO
3
AC198~264?
Abnormal 4way valve of Outdoor Unit.
or connecting Cable
4 way valve should be replaced
or connecting Cable Check.
NO
YES
YES
YES
NO
NO
NO
YES
Normal
Abnormal Micom
Abnormal IC07
Abnormal RY73
PCB should be replaced.
Y
Y
N
N
N
Y
Y
Y
TSH00-9 5/31/01 1:57 PM Page 5-5