Troubleshooting
5-3
Samsung Electronics
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 (CN72)?
(2) Is the AC voltage correct?
(3) Is HALL IC in indoor fan motor properly connected with the connector (CN42)?
(4) Is the running capacitor (CR71) properly connected with PCB board?
2)
Troubleshooting procedure
After unplugging out the power cord should
be reconnected within five seconds.
Does the STD lamp(Green) blink?
Does the Solid State Relay(SS71) work
properly?
Is the supply voltage of the fan
motor sufficient?
Test rod location
PCB CN72
Condition
Fan operate
about AC 180V
Normal
voltage
pin #3 and #5
YES
YES
YES
NO
NO
NO
Check as in the procedure “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
DB81-00181A(4)-1 3/6/11 3:24 PM Page 5-3
Summary of Contents for AQ12?5(6)MB
Page 13: ...MEMO Samsung Electronics 3 4...
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Page 55: ...MEMO Samsung Electronics 6 16...
Page 57: ...MEMO Samsung Electronics 7 2...
Page 58: ...8 1 Samsung Electronics 8 PCB Diagrams 8 1 ASS Y MAIN PCB DB93 00437A TOP PATTERN...
Page 60: ...8 3 Samsung Electronics PCB Diagrams BOTTOM PATTERN...
Page 61: ...Samsung Electronics 8 4 8 2 ASS Y MAIN PCB DB93 01017A TOP PATTERN...
Page 63: ...PCB Diagrams Samsung Electronics 8 6 BOTTOM PATTERN...
Page 65: ...MEMO Samsung Electronics 8 8...
Page 66: ...9 1 Samsung Electronics 9 Wiring Diagrams 9 1 Indoor Unit...
Page 68: ...MEMO 9 3 Samsung Electronics...
Page 69: ...Samsung Electronics Samsung Electronics 10 2 10 1 10 Schematic Diagrams 10 1 Indoor Unit...
Page 70: ...MEMO Samsung Electronics 10 3...
Page 72: ...ELECTRONICS Samsung Electronics Co Ltd Mar 2002 Printed in Korea Code No DB81 00181A 4...