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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 Nos. 01, 02, 06, and 17
Error No. Description Details Causes
01
Indoor unit return air or optional remote wall tem-
perature sensor communications error.
Sensor has
disconnected or
short circuited.
Use the OHM
and voltage
check charts.
1. Problem with the sensor.
2. Connections on indoor unit PCB are wrong.
3. Indoor unit PCB has failed.
01 (Fresh Air
Unit [FAU])
Fresh air unit outlet air sensor error.
02
Indoor unit inlet pipe temperature sensor communi-
cation error.
06
Indoor unit or hydro kit outlet pipe temperature
sensor error.
1. Indoor unit outlet pipe temperature sensor is
disconnected or shorted. (Check the connection on
the indoor unit PCB, then check the thermistor.)
2. Hydro kit liquid side temperature sensor is
disconnected or shorted. Values read less than
&RUJUHDWHUWKDQ&OHVVWKDQ)RU
JUHDWHUWKDQ)
16
Hydro kit indoor unit water pipe temperature and
ambient temperature sensor communication error.
Water inlet and outlet pipe temperature sensor
disconnected, shorted, or opened.
17
Hydro kit inlet pipe temperature sensor communi-
cation error. Outside air duct inlet pipe temperature
sensor communication error.
1. Water inlet temperature sensor disconnected
or shorted. Values read less than -43°C or greater
WKDQ&OHVVWKDQ)RUJUHDWHUWKDQ
)
2. Temperature sensor disconnected, shorted, or
opened.
Is the sensor properly connected to
the PCB?
Is the resistance value of the sensor
normal?
Replace the PCB.
Connect to the PCB properly.
Change the sensor.
No
No
Yes
Yes
• ,IWKHYDOXHLV!NȍRSHQRUȍ
(short), there is an error.
• Sensor resistance value will vary with the
temperature. See below for the resistance
values according to temperature (±5% toler-
ance).
• $LUWHPSHUDWXUHVHQVRU) Nȍ)
Nȍ) Nȍ
• 3LSHWHPSHUDWXUHVHQVRU) Nȍ)
Nȍ) Nȍ
CN-ROOM: Indoor Air Temperature Sensor
CN-PIPE IN: Pipe Inlet Temperature Sensor
CN-PIPE OUT: Pipe Outlet Temperature Sensor
Measure the resistance of outlet pipe temperature
sensor.
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