When The Indoor Unit Fan Does Not Operate. (Initial Diagnosis) - Samsung SH07AS2 Service Manual

Troubleshooting

6-2-4 When the Indoor Unit Fan Does Not Operate. (Initial Diagnosis)

Description
Indoor fan motor malfunction
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 Fan operating
22
Yes
Yes
Normal
Voltage
-
SS71-
12V
Yes
Normal
voltage
Condition
About AC 180V
Yes
LAMP
OPERATION TIMER
No
Check as in the procedure "NO power"
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.
7-segment
TURBO
Display
: Lamp off : Lamp flickering
Micom should be replaced
PCB should be replaced.
Replace Motor
Fan-Capacitor
Fan motor should be replaced.
Samsung Electronics