Samsung UM27A1C3, Руководство по обслуживанию, Страница: 10 / 27

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3-2-2 When the Indoor Unit Fan Does Not Operate. (Initial Diagnosis)
1) Checklist :
(1) Is input voltage normal?
(2) Is the indoor unit fan properly connected(CN73)(CN43)?
(3) Is the starting codenser CR 71 properly soldered?
(4) Is HALL IC in indoor fan motor properly connected(CN43)?
(5) When in operation mode, does the indoor unit fan operate?
2) Troubleshooting procedure
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Remove power cord and plug in again in approx. 5 seconds.
Is operating lamp lights on for
three minutes, and then goes off?
Check whether the indoor fan turns with the operation
lamp being turned on when the start/stop button of the
remote control is pressed?
¥Is a voltage of above rating voltage ± 10%applied to
both ends of theindoor fan connector (CN73)?
¥Is pin #3 of the CN43 a square wave?
Check the indoor fan motor or fan motor capacitor.
Check the Q401 (KSC945Y).
Replace the IC07.
Replace the SS71 (G3MB202PL).
Go to the item of "No power
parts" (Refer to page 8.)
No problem (Normal)
Is pin #63 of the micom (IC04)
a square wave?
Is pin #16 of the IC07 a square wave?
Is pin #24 of the micom (IC04)
a square wave?
Replace the micom (IC04).
31039A(5)-All 4/17/01 5:36 PM Page 9
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