Samsung MC26AC2X Service Manual download pdf (Page 33)

Troubleshooting

Samsung Electronics5-8

5-2-6 When the UP/DOWN Louver Moter Does Not Operate. (Initial Diagnosis)

1) Checklist :

(1) Is input voltage normal?

(2) Is the UP/DOWN louver motor properly connected with the connector (CN61)?

2) Troubleshooting procedure

5-2-7 In the mode, When there is no cool air current. Check this first;

(1) Is the set temperature of Remote Control lower than room temperature in Cool mode?

(2) Is the Indoor PCB properly connected with the CN71 connector?

Remove power cord and plug in again in approx. 5 seconds.

Is STD lamp blinking?

Does operation start when swing button of the

remote control unit pushed?

Voltage at pin #58 ~ #61 of micom (ICO4) change?(Squarewave)

Volatge at pin #13 ~ #16 of IC06 (ULN2003AFW)

change?(Squarewave)

UP/DOWN louver motor is faulty.

Driver IC06 (ULN2003AFW) is faulty.

Micom (IC04) is faulty.

Normal

Check as in the procedure "No Power parts".

Refer to page 5-2.

After training on, the Cooling operation should

start in five minutes.

Is the number #33 of Micom (IC04) DC 5.0 V?

Is the number checking #10 of IC06 (ULN2003AFW) LOW?

RY01 or Cable Check.

YES

Normal

Abnormal Micom

Abnormal IC06

PCB should be replaced.

YES

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Samsung MC26AC2X Service Manual Page 33