Samsung AQT24A1QE/B, Service Manual

Page: 31 / 54

Samsung Electronics
5-3
5-2-2 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 corre c t ?
(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 pro c e d u re
Troubleshooting
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?
Is the supply voltage of the fan
motor sufficient?
Test rod location
PCB CN73 Condition
Fan operate = AC 180V
Normal
voltage
Pin 3, Pin 5
YES
YES
YES
NO
NO
NO
Check as in the procedur “NO power parts” Refer tp
page 5-2.
Microcomputer is out of order.
PCB is
out of order.
PCB should be
replaced.
Replace MFC
Fan motor
should be replaced.
Fan motor
is out of order.
MF-C is out of order
YES
-
Test rod location
+
SS71+ SS71- 12V
Normal
Voltage
.
.