Samsung WALL MOUNTED TYPE Technical Manual page 114

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 solder part of the PCB?
2) Troubleshooting procedure
After unplugging out the power cord should
Does the operating lamp blink?
Does the Solid State Relay(SS71) work
properly?
Test rod location
+
SS71+
Is the supply voltage of the fan
Test rod location
PCB CN73
pin3, pin5
115
Troubleshooting
be reconnected within five seconds.
YES
YES
Normal
Voltage
-
SS71- 12V
YES
motor sufficient?
Normal
voltage
Condition
Fan operate = AC 180V :
YES
NO
Check as in the procedur "NO power parts"
NO
NO
PCB is
out of order.
MF-C is out of order
Fan motor
is out of order.
Microcomputer is out of order.
Refer to replace
PCB module
Replace MFC
Fan motor
should be replaced.