Error Code Check - LG MULTI V 5 Manual Book

2. Error Code Check

Major error Diagnosis Method
Error
Error Type
No.
Error No. Error Type
01 Air temperature sensor error
01 Air temperature sensor error
02 Gas side temperature sensor error
02 Gas side temperature sensor error
06 Liquid side temperature sensor error
06 Liquid side temperature sensor error
08 Water tank temperature sensor error
08 Water tank temperature sensor error
16 Water inlet & outlet temperature sensor error
16 Water inlet & outlet temperature sensor error
17 Water inlet temperature sensor error
17 Water inlet temperature sensor error
18 Water outlet temperature sensor error
18 Water outlet temperature sensor error
n Error diagnosis and countermeasure flow chart
No
Is sensor properly
Connect properly to PCB
connected to PCB?
Yes
No
Is the resistance value
Change the sensor
of sensor normal?*
Yes
Change the PCB
* If the resistance value of the temperature sensor changes according to temperature, and the following resistance
values are displayed based on the current temperature, it is normal. (±5% error)
Air temperature sensor : 10℃(50℉)=20.7kΩ : 25℃(77℉)=10kΩ : 50℃(122℉)=3.4kΩ
Gas/Liquid side temperature sensor : 10℃(50℉)=10kΩ : 25℃(77℉)=5kΩ : 50℃(122℉)=1.8kΩ
Water inlet/outlet temperature sensor : 10℃(50℉)=10kΩ : 25℃(77℉)=5kΩ : 50℃(122℉)=1.8kΩ
Water tank temperature sensor : 10℃(50℉)=10kΩ : 25℃(77℉)=5kΩ : 50℃(122℉)=1.8kΩ
Copyright ©2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
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Self-diagnosis Function
Error Point Main Reasons
Error Point Main Reasons
1. Indoor unit PCB wrong connection!
Sensor is
2. Indoor unit PCB failure! 1. Indoor unit PCB wrong connection!
open/short Sensor is
3. Sensor problem (main reason) 2. Indoor unit PCB failure!
open/short
3. Sensor problem (main reason)
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Error
Error Type
No.
Error No. Error Type Error Point
The remote control-
No communication between The remote controller
ler did not receive the
03 No communication between cabled
did not receive the sig-
03 cabled remote controller &
signal from indoor unit
remote controller & indoor unit
nal from indoor unit
indoor unit
during specific time
during specific time
n Error diagnosis and countermeasure flow chart
Does the error happens
No
Replace cabled remote
again if the remote
controller
controller is replaced?*
Yes
Does the error occurred
No
Check connection &
when the cable of remote
communication cable **
controller is replaced?
Yes
Replace indoor unit PCB ***
* If there is no remote controller to replace : Use another unit's remote controller doing well
** Check cable : Contact failure of connected portion or extension of cable are main cause
Check any surrounded noise ( check the distance with main power cable)
' make safe distance from the devices generate electromagnetic wave
*** After replacing indoor unit PCB, do Auto Addressing & input unit's address if connected to central controller.
(All the indoor units connected should be turned on before Auto Addressing
Copyright ©2017 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Error Point Main Reasons
Main Reasons
1. Remote controller fault
1. Remote controller fault
2. Indoor unit PCB fault
2. Indoor unit PCB fault
3. Connector fault, Wrong connection
3. Connector fault, Wrong connection
4. Communication cable problem
4. Communication cable problem
CN-REMO : Remote controller connection
The PCB can differ from model to model.
❇
Check from the right source.
Checking communication cable connection status
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LGE Internal Use Only
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