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MULTI V 5 Outdoor Unit Service Manual
Due to our policy of continuous product innovation, some specifications may change without notification.
©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
ERROR CODES
Please refer to the Safety Precautions on pages 4-7 for more detail to prevent injury or death regarding the operation and service
troubleshooting of the Multi V product.
WARNING
Error No. Description Details Causes
41 (Inverter
Compressor1)
Master: 411
Slave 1: 412
Slave 2: 413
Outdoor unit
inverter compres-
sor discharge
pipe temperature
sensor error.
Disconnection or short circuit of outdoor unit
compressor discharge temperature sensor.
Error occurs within three (3) minutes of oper-
ation.
Error also occurs after three (3) minutes of
compressor operation when discharge tem-
perature sensor is removed (before compres-
sor operation).
1. Error can also occur if the system is operat-
ing in cooling at extremely low temperatures
with no low ambient kit.
2. Compressor discharge pipe temperature
sensor (TH3) is not installed or connected
properly.
3. Defective compressor discharge pipe sen-
sor (TH3) (opened or shorted).
4. Defective outdoor unit PCB.
47 (Inverter
Compressor2)
Master: 471
Slave 1: 472
Slave 2: 473
Error Nos. 41 and 47
(UURULVJHQHUDWHGLIUHVLVWDQFHLV!0ȍRSHQDQGNȍVKRUW
• Standard values of sensor resistance at different temperatures (5%
variation): 50°) Nȍ°) Nȍ°) Nȍ°F
Nȍ
• 2WKHUWHPSHUDWXUHVHQVRUUHVLVWDQFHYDOXHV) Nȍ
) Nȍ) Nȍ) Nȍ
) Nȍ) Nȍ
Check the resistance
of the Inverter compressor
discharge temperature
sensor.
Images here are representative
of system components. Actual
component appearance depends
on model and system type.
Is the sensor installed
or connected to the PCB
correctly?
Replace corresponding sensor.
Yes
Yes
Is the resistance of
the sensor normal?*
Are the sensor resistance
and the temperature values (in
LGMV) the same?
Yes
Labels for Outdoor Unit
Sensors:
• Outdoor Temperature Sensor:
TH1
• Pipe Temperature Sensor:
TH2
• Discharge Pipe (D-pipe)
Temperature Sensor: TH3
Insert sensor connector to PCB correctly.
No
No
No
Replace sensor.
Replace corresponding outdoor unit PCB.
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