Troubleshooting Indoor Error - LG ATNH09GRLE2 Svc Manual

4. Trouble Shooting

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)
Is sensor properly
connected to PCB?
Yes
Is the resistance value
of sensor normal?*
Yes
Change the PCB
** In case the value is more than 100kΩ (open) or less than 100Ω (short), Error occurs
Refer: Resistance value maybe change according to temperature of temp sensor,
It shows according to criteria of current temperature(±5% margin)
Air temp sensor: 10°C = 20.7kΩ : 25°C= 10kΩ : 50°C= 3.4kΩ
Pipe temp sensor: 10°C = 10kΩ
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Only for training and service purposes
No
Connect properly to PCB
No
Change the sensor
: 25°C= 5kΩ : 50°C= 1.8kΩ
- 67 -
Normal
CN-ROOM : Indoor air temp sensor
CN-PIPE IN : Pipe inlet temp sensor
CN-PIPE OUT : Pipe outlet temp sensor
Measure the resistance of outlet pipe temp sensor.
LGE Internal Use Only