Samsung AD26B1C13, UD26B1C2, UD18B1C2, AD18B1C09 3-3-4When the fan of indoor unit does not operate

3-3-4 When the fan of indoor unit does not operate

1)Inspection items

(1)Is the power voltage normal?

(2)Is the connector of indoor fan with the good contact? (CN73)

(3)Is the soldering status of running condenser (CR71) with the good contact?

(4)Is connector of the Hall IC with the good contact (CN 43) ?

(5)Is the indoor fan rotating when it is under operation mode?

(6)Is the FAN LED (green) flickering when the indoor fan stalled (for more than 15 seconds) and the trouble condition of speed detecting part?

Error occurs after the

indoor unit fan motor is rotating for 15 seconds?

(FAN Lamp flickering)

YES

Replacement of

indoor unit fan motor.

Put the power off and put it on after 5 seconds.

		YES
	Is the operation lamp flickering for 3 minutes and			NO
	then put off?
		YES
YES	If the operation /stop button of the remote controller			NO
	is pressed, is the operation lamp flickering and then is
	the indoor fan rotating after 5~6 seconds?
		YES
YES
	Is AC 120V and higher shown across the indoor fan
	connector (CN73) ?
		NO
NO	Is the type of MICOM (IC 04) Pin no.
	63 old type ?
			120Hz
		YES
	Is the pin no. 12 of IC 06 (KID 65003)			NO
	the old type?
			120Hz

If the power is not available (indoor unit), item no 3-3-1.

Replace of indoor unit PCB Ass'y.

Replace the IC 06 (KID 65003)

and SS71(G3MB202pl).

YES

Is the pin no 25 of MICOM the old type?

NO

Replace Q401 (Ksc 945Y).

Replace the indoor unit PCB Ass'y due to the

Micom defect.

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