Samsung AS12A2VC Service Manual page 11

3-2-2 When the Indoor Unit Fan Does Not Operate. (Initial Diagnosis)
1) Checklist :
(1) Is the indoor unit fan motor properly connected with the connector (CN73)?
(2) Is the AC voltage correct?
(3) Is HALL IC in indoor fan motor properly connected with the connector (CN43)?
(4) Is the running capacitor properly connected with the terminal?
2) Troubleshooting procedure
After unplugging out the power cord should
be reconnected within five seconds.
Does the operating lamp(Green) blink?
Does the Solid State Relay(SS71) work
properly?
Test rod location
+
SS71-
Is the supply voltage of the fan
motor sufficient?
Test rod location
Condition
PCB CN73
Fan operate
10
YES
YES
Normal
Voltage
-
SS71-
12V
YES
Normal
voltage
AC 180V
YES
Check as in the procedur "NO power parts" Refer tp
NO
Microcomputer is out of order.
NO
PCB is
out of order.
NO
MF-C is out of order
Fan motor
is out of order.
page 5-2.
PCB should be
replaced.
Replace MFC
Fan motor
should be replaced.