Troubleshooting Indoor Error - LG ABNW85GB9A0 Svc Manual

Part 4 Trouble Shooting

6.5 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)
Error
Error Type
No.
01 Indoor unit air sensor error
02 Indoor unit pipe intake sensor error
06 Indoor unit pipe outlet sensor error
■ Error diagnosis and countermeasure flow chart
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) ➔ Normal
Air temp sensor: 10°C = 20.7kΩ : 25°C= 10kΩ : 50°C= 3.4kΩ
Pipe temp sensor: 10°C = 10kΩ
CN-ROOM
CN-PIPE/IN
CN-PIPE/OUT
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Only for training and service purposes
Indoor unit sensor is
No
Connect properly to PCB
No
Change the sensor
: 25°C= 5kΩ : 50°C= 1.8kΩ
- 41 -
Error Point
1. Indoor unit PCB wrong connection
2. Indoor unit PCB failure
open/short
3. Sensor problem (main reason)
Main Reasons
Measure the resistance
of outlet pipe temp
sensor.
LGE Internal Use Only