LG Multi V CRUN Series Service Manual page 235

Fault diagnosis and Trouble shooting guide
Display
Title
code
40, 41,
42, 43,
Sensor
44, 45,
error
46, 47,
48, 49
Trouble shooting Flow
Confirm the state of sensor connection
Meaning
Sensor detects abnormal
value
to the PCB
Is the state of sensor
connection normal?
Yes
Is the value of Sensor
resistance/voltage
normal?
•• Refer to value table of temperature-resistance in appendix
Yes
•• Refer to value table of pressure-voltage in appendix
Check indoor unit
PCB
Cause of error
•The temperature sensor is unplugged
•The sensor is open or short by its inferiority
•PCB inferiority
No
Plug the sensor to
normal position
No
Replace sensor
which is
corresponded
Self-diagnosis function
Service Manual 235