LG MULTI V IV ARNU12GTU 2 Series User Manual

Troubleshooting Guide
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Copyright ©2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
01 Indoor unit air sensor error
01(FAU) FAU Outlet air sensor error
02 Indoor unit pipe inlet sensor error
06 Indoor unit pipe outlet sensor error
17(FAU) FAU Inlet air sensor error
Error
No.
Error Type Error Point Main Reasons
Indoor unit sensor is
open/short
1. Indoor unit PCB wrong connection
2. Indoor unit PCB failure
3. Sensor problem (main reason)
** 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 : 25°C= 5kΩ : 50°C= 1.8kΩ
n Error diagnosis and countermeasure flow chart
Is sensor properly
connected to PCB?
Is the resistance value
of sensor normal?*
Connect properly to PCB
Change the sensor
Change the PCB
Yes
Yes
No
No
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.

LG MULTI V IV ARNU12GTU 2 Series Specifications

General

Brand	LG
Model	MULTI V IV ARNU12GTU 2 Series
Category	Air Conditioner
Language	English