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2. When the Indoor Unit Fan Does Not Operate - Initial Diagnosis
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 correct?
(3) Is HALL IC in the indoor fan motor properly connected with the connector (CN43)?
(4) Is the running capacitor properly connected with PCB board?
2) Troubleshooting procedure
After unplugging out, the power cord should
be reconnected within five seconds.
Does the STD lamp(Orange) 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
about AC
180V
Normal
voltage
pin #3 and #5
YES
YES
YES
NO
NO
NO
Check as the procedure “No power”
Refer to page”16”
Micom is abnormal
PCB is
abnormal
Replace the PCB
module
Refer to page21
Replace MFC
Replace Fan motor
Fan motor
is abnormal.
MFC is abnormal
YES
-
Test rod location
+
SS71- SS71- 12V
Normal
Voltage
AS18A9(0)RCF SM_E_15775 3/10/05 7:15 PM Page 17
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