LG Multi V 5 - Page 67

132 133
_TROUBLE SHOOTING GUIDE BOOK _
- 149 -
Copyright ©2017 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
n
Error diagnosis and countermeasure flow chart
Is temperature sensor
connector connections
are normal?
Is the value of temperature
sensor resistance normal?*
Check and correct connection
Replace sensor
Replace outdoor unit PCB
Yes
Yes
No
No
* Sensor resistance 100 kΩover (open) or 100 Ω below (short) will generate error
Note: Temperate sensor resistance vary with temperature, So compare temperature sensor resistance value
according to outdoor unit temperature by referring below table (±5% tolerance)
Air temperature sensor: 10°C = 20.7kΩ : 25°C = 10kΩ : 50°C= 3.4kΩ
Pipe temperature sensor: 10°C = 10kΩ : 25°C = 5kΩ : 50°C= 1.8kΩ
Error No. Error Type Error Point Main Reasons
113*
Master
1131
Slave1
1132
Slave2
1133
Slave3
1134
Outdoor unit liquid
pipe (condenser) tem-
perature sensor error
Abnormal sensor resis-
tance value
(Open/Short)
1. Defective temperature sensor connection
2. Defective temperature sensor (Open / Short)
3. Defective outdoor unit PCB
114*
Master
1141
Slave1
1142
Slave2
1143
Slave3
1144
Outdoor Unit
Subcooling Inlet
Temperature Sensor
Error
Abnormal sensor resis-
tance value
(Open/Short)
1. Defective temperature sensor connection
2. Defective temperature sensor (Open/Short)
3. Defective outdoor PCB
115*
Master
1151
Slave1
1152
Slave2
1153
Slave3
1154
Outdoor Unit
Subcooling Outlet
Temperature Sensor
Error
Abnormal sensor resis-
tance value
(Open/Short)
1. Defective temperature sensor connection
2. Defective temperature sensor (Open/Short)
3. Defective outdoor PCB
Error No. Error Type Error Point Main Reasons
113*
Outdoor unit liquid
pipe (condenser)
temperature sensor
error
Abnormal sensor
resistance value
(Open/Short)
1. Defective temperature sensor connection
2. Defective temperature sensor(Open / Short)
3. Defective outdoor unit PCB
114*
Outdoor Unit
Subcooling Inlet
Temperature Sensor
Error
Abnormal sensor
resistance value
(Open/Short)
1. Defective temperature sensor connection
2. Defective temperature sensor(Open/Short)
3. Defective outdoor PCB
115*
Outdoor Unit
Subcooling Outlet
Temperature Sensor
Error
Abnormal sensor
resistance value
(Open/Short)
1. Defective temperature sensor connection
2. Defective temperature sensor(Open/Short)
3. Defective outdoor PCB
- 148 -
Copyright ©2017 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
1. Wrong wiring between Inverter PCB and
Fan PCB
2. Fan PCB assembly defect
3. Reactor terminal contact defect
4. DC link terminal wiring/contact defect
5. Bridge diode defect
Error No. Error Type Error Point Main Reasons
Fan PCB DC link voltage supplied
below 380V
Fan DC Link Low
Voltage Error
107＊
Master
1071
Slave2
1072
Slave3
1074
n Error Diagnosis and Countermeasure Flow Chart
1. Check DC_Link Wire connection
2. DC_Link
→ Replace wire if abnormality found
Measure DC_Link voltage
→ Check Inverter PCB if voltage is below 380V
Yes
No
Yes
No
Is wiring between fan motor
and PCB normal?
Is DC_Link voltage normal?
Yes
Is Fan PCB assembly normal?
Recheck power and
installation condition
No
DC voltage connection
Replace fan PCB assembly
DC Volt connected
Error No. Error Type Error Point Main Reasons
107*
Fan Control part
communication
defect
Fan PCB not re
-
ceived the data from
Main PCB
1. Overload operation (Pipe clogging/Covering/
EEV defect/Ref. overcharge
2. ODU fan motor assemble condition abnormal
(Coil disconnection/Short/Insulation damage)
3. Fan PCB assembly defect
Basic Part
Multi V 5
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Trouble Shooting
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