Samsung Electronics
4-9
4-3-4 Indoor Fan Motor Speed Detecting Error
When
is diplayed
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
Micom is
out of order.
Check as in the procedure
“No power parts”
No
Does the OPERATION lamp blink?
After unplugging out the power cord should
be reconnected within 5 seconds.
Does the Solid State Relay(SS71) work properly?
Test rod location
Normal
Voltage
+
-
SS71-
SS71-
12V
Is the supply voltage of the fan motor sufficient?
Test rod location
Normal
Voltage
PCB CN72
Condition
pin #3 and #5
Fan operate
About AC
180V
Micom should be replaced
PCB is
out of order.
PCB should be replaced.
Yes
Yes
Yes
No
No
Yes
Motor Fan-Capacitor is out of order
Replace Motor
Fan-Capacitor
Fan motor
is out of order.
Fan motor
should be replaced.
