LG MULTI V 5 Manual Book page 67

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