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4. Trouble Shooting

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Only for training and service purposes

LGE Internal Use Only

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Is connector

connection proper?

Yes

Connect properly

Is fan motor

normal?*

Replace indoor unit fan motor

* It is normal when check hall sensor of indoor fan motor as shown below

Yes

Replace indoor unit PCB **

1 4 5

6 7

Each termainl with the tester

Tester

TH chassis

hundreds kΩ hundreds kΩ

TD chassis

Normal resistance(±10%)

** Replace the indoor unit PCB, and then make sure to do Auto addressing and input the

address of central control

(Notice: The connection of motor connector to PCB should be done under no power

supplying to PCB)

∞

6.6 Troubleshooting Indoor Error

CH 10 (Indoor unit BLDC fan motor failure)

LG CT18 NQ2 User Manual

Questions and Answers: