LG multi V PLUS Service Manual page 260

Self-diagnosis function
Display
Sub1 Outdoor Unit constant speed
compressor2 discharge temperature
1 2 2
sensor
Sub1 Outdoor Unit heat exchanger
1 2 3
sensor (front side)
Sub1 Outdoor Unit heat exchanger
1 2 4
sensor (rear side)
Sub1 Outdoor Unit liquid pipe temper-
1 2 5
ature sensor
Sub1 Outdoor Unit excessive cooling
1 2 6
inlet temperature sensor
Sub1 Outdoor Unit excessive cooling
1 2 7
outlet temperature sensor
Sub2 Outdoor Unit High Pressure
1 2 8
sensor (3Units)
Sub2 Outdoor Unit Low Pressure
1 2 9
sensor (3Units)
Sub2 Outdoor Unit air temperature
1 3 0
sensor (3Units)
Sub2 Outdoor Unit suction
1 3 2
temperature sensor (3Units)
Sub2 Outdoor Unit constant speed
compressor1 discharge temperature
1 3 3
sensor (3Units)
Sub2 Outdoor Unit constant speed
1 3 4 compressor2 discharge temperature
sensor (3Units)
Sub2 Outdoor Unit heat exchanger
temperature sensor (front side)
1 3 5
(3Units)
Sub2 Outdoor Unit heat exchanger
1 3 6 temperature sensor (rear side)
(3Units)
Sub2 Outdoor Unit liquid pipe
1 3 7
temperature sensor (3Units)
Sub2 Outdoor Unit excessive cooling
1 3 8
inlet temperature sensor (3Units)
Sub2 Outdoor Unit excessive cooling
1 3 9
outlet temperature sensor (3Units)
Sub2 Outdoor Unit High Pressure
1 4 0
sensor (3Units)
Reverse connection of the R, S, T
1 4 1
Power line of Sub2 Outdoor Unit
Transmission related error between
Outdoor Units (Main Outdoor Unit
1 4 2
Sub2 Outdoor Unit) (3Units)
High Pressure of Sub1 Outdoor Unit
1 4 3
260 Trouble Shooting Guide
Title
Open or short of Sub1 Outdoor Unit constant speed com-
pressor2 discharge temperature sensor
Open or short of heat exchanger sensor of Sub1 Outdoor
Unit (front side)
Open or short of heat exchanger sensor of Sub1 Outdoor
Unit (rear side)
Open or short of Sub1 Outdoor Unit liquid pipe temperature
sensor
Open or short of Sub1 Outdoor Unit excessive cooling inlet
temperature sensor
Open or short of Sub1 Outdoor Unit excessive cooling outlet
temperature sensor
Open or short of Sub2 Outdoor Unit High Pressure sensor
(3Units)
Open or short of Sub2 Outdoor Unit Low Pressure sensor
(3Units)
Open or short of Sub2 Outdoor Unit air temperature sensor
(3Units)
Open or short of Sub2 Outdoor Unit suction temperature sen-
sor (3Units)
Open or short of Sub2 Outdoor Unit constant speed com-
pressor1 discharge temperature sensor (3Units)
Open or short of Sub2 Outdoor Unit constant speed com-
pressor2 discharge temperature sensor (3Units)
Open or short of Sub2 Outdoor Unit heat exchanger temper-
ature sensor(front side) (3Units)
Open or short of Sub2 Outdoor Unit heat exchanger temper-
ature sensor(rear side) (3Units)
Open or short of Sub2 Outdoor Unit liquid pipe temperature
sensor (3units)
Open or short of Sub2 Outdoor Unit excessive cooling inlet
temperature sensor (3units)
Open or short of Sub2 Outdoor Unit excessive cooling outlet
temperature sensor (3units)
Open or short of Sub2 Outdoor Unit High Pressure sensor
(3units)
Misconnection or disconnection of R, S, T Power line of Sub2
Outdoor Unit
If failing to receive signal of the central control part from the
main control part
Compressor Off by excessive increase of Sub1 Outdoor Unit
High Pressure
Cause of Error