LG ARNU Series, Service Manual

Page: 179 / 226

Service Manual 179
Troubleshooting Guide
Sensor error at
the outdoor Liquid
Refrigerant pipe
Error
Code
Error Contents Meaning Main Causes
Error display
position
113
Abnormal value of Sensor
measurement
(Open/Short)
Concerned
Remote
Controller
Outdoor unit
1. Defective temp sensor connector
connection
2. Defective temp sensor Open/Short)
3. Defective outdoor PCB
Sensor error at
the outdoor sub
cooling inlet or
outlet
Error
Code
Error Contents Meaning Main Causes
Error display
position
114(Main
Sub cool
inlet)
115(Main
Sub cool
outlet)
Abnormal value of the sen-
sor measurement
(Open/Short)
Concerned
Remote
Controller
Outdoor unit
1. Defective temp sensor connector
connection
2. Defective temp sensor
(Open/Short)
3. Defective outdoor PCB
■
Defect inspection method
1) Check the temp sensor connector connecting condition and lead wire.
2) Is the temp sensor resistance value normal? Otherwise, replace the sensor
- Pipe temp sensor : 10°C = 10k
Ω
: 25°C = 5k
Ω
: 50°C = 1.8k
Ω
3) In case the sensor connection and the resistance value is correct then replace the outdoor PCB .
Communication
error between the
Main PCB and the
fan PCB
Error
Code
Error Contents Meaning Main Causes
Error display
position
108
Communication error
between the Main PCB
and the fan PCB
(Fan › outdoor , outdoor ›
fan )
Refer to CH105