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Part 4 Trouble Shooting

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6.6 Troubleshooting Indoor Error

CH 01 (Indoor unit air sensor error)

CH 02 (Indoor unit pipe inlet sensor error)

CH 06 (Indoor unit pipe outlet sensor error)

** In case the value is more than 100 kΩ (open) or less than 100 Ω (short), Error occurs

Refer: Resistance value maybe change according to temperature of temp sensor,

It shows according to criteria of current temperature(±5 % margin)

Normal

Air temp sensor: 10 °C = 20.7 kΩ : 25 °C= 10 kΩ : 50 °C= 3.4 kΩ

Pipe temp sensor: 10 °C = 10 kΩ : 25 °C= 5 kΩ : 50 °C= 1.8 kΩ

Is sensor properly

connected to PCB?

Is the resistance value

of sensor normal?*

Connect properly to PCB

Change the sensor

Change the PCB

Yes

CN_PIPE_IN : Pipe inlet temp sensor

CN_PIPE_OUT : Pipe outlet temp sensor

CN_ROOM : Indoor air temp sensor

Measure the resistance of outlet pipe temp sensor.

Error No.

Error Type Error Point Main Reasons

Indoor unit air sensor error

Indoor unit sensor is open/

short

1. Indoor unit PCB wrong connection

2. Indoor unit PCB failure

3. Sensor problem (main reason)

Indoor unit pipe inlet sensor error

Indoor unit pipe outlet sensor error

■ Error diagnosis and countermeasure flow chart

LG CM24F Service Manual

Other manuals for LG CM24F