Samsung 4qt12whwe Service Manual page 16

5-3-2 When the Indoor Unit Fan Does Not Operate. (Initial Diagnosis)
1. Checklist :
1) Is the indoor unit fan motor properly connected with the connector (CN72)?
2) Is the AC voltage correct?
3) Is HALL IC in indoor fan motor properly connected with the connector (CN44)?
4) Is the running capacitor (CR71) properly connected with PCB board?
2. Troubleshooting procedure
After unplugging out the power cord should
be reconnected within 5 seconds.
Does the OPERATION lamp 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
PCB CN72
pin #3 and #5
Samsung Electronics
Yes
Yes
Normal
Voltage
-
SS71- 12V
Yes
Normal
Voltage
Condition
About AC
Fan operate
180V
Yes
No
No
Micom is
out of order.
No
PCB is
out of order.
Motor Fan-Capacitor is out of order
Fan motor
is out of order.
Troubleshooting
Check as in the procedure
"NO power parts"
Micom
should be replaced
PCB should be
replaced.
Replace Motor
Fan-Capacitor
Fan motor
should be replaced.
15