LG AS-W1863 Series Svc Manual page 72

Universal air conditioner

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Troubleshooting Guide

When the horizontal louver does not operate.

Trouble 5

• Confirm that the vertical louver is normally geared with the shaft of Stepping Motor.

• If the regular torque is detected when rotating the vertical louver with hands ⇒ Normal

• Check the connecting condition of CN-U/D Connector

• Check the soldering condition(on PCB) of CN-U/D Connector

• Confirm that there is DC +12V between pin ➀ of CN-U/D and GND.

• Confirm that there is a soldering short at following terminals.

- Between

• Confirm the assembly condition that are catching and interfering parts in the link of the

vertical louver

Only for training and service purposes

Check the operating circuit of the vertical louver

and

of MICOM

and

of IC01M

5 , 6

and

of IC01M

11 , 12

If there are no problems after above checks.

- 72 -

LGE Internal Use Only

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As-w2463 series