LG MULTI V 5 Manual Book page 46

Self-diagnosis Function
Error
Error Type Error Point
No.
Error No. Error Type Error Point
Water outlet tempera-
Water outlet temperature is
15 Water pipe overheated ture is
15 Water pipe overheated
above 85℃(185℉)
above 85℃(185℉)
n Error diagnosis and countermeasure flow chart
NO
Is the thermometer installed outside
Check facility
the unit 80℃ (176℉) or less?
YES
Is water inlet/outlet temperature
NO
Insert water inlet/outlet temperature sensor in
sensor inserted in the correct
the correct location
location? *
YES
NO
Is water inlet/outlet temperature
Replace water inlet/outlet temperature sensor
sensor normal? **
YES
Replace indoor unit
PCB
*Water inlet/outlet temperature **If the resistance value of the temperature sensor changes according to temperature, and the following
sensor location 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
Water outlet
temperature
sensor
Water inlet
temperature
sensor
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Only for training and service purposes
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_TROUBLE SHOOTING GUIDE BOOK
Main Reasons
Main Reasons
1. High temperature of water inflow
1. High temperature of water inflow
2. Temperature sensor defect 2. Temperature sensor defect
3. Indoor unit PCB fault
3. Indoor unit PCB fault
Measuring the resistance
value of the temperature
sensor
- 34 -
LGE Internal Use Only
Error No. Error Type Error Point
Refrigerant leakage Detecting the error of the
230
sensing error Ref. sensor.
Did set the function code for
No
Power reset
detecting Ref. sensor?
(Check Function code 29:01)
Yes
1. Power off
Did the connector between
No
2. Check the connector and connecting condition
main PCB and ref. sensor connect
between Main PCB and Sensor.
properly ?
3. Power on
Yes
No
Did the sensor work well?
1. Replace the leakage sensor
(refer to picture)
Yes
Detecting Ref. leakage
Normal status: Blinking Green LED or both Green and Red LED on.
Error status: the green and red LED blink alternately.
Main Reasons
1. Function code setting without
Ref. sensor
2. Malfunction of Rf. Sensor
3. Detecting the leakage of Ref.
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