LG MULTI V IV ARNU07GTU 2 Series - Page 130

Troubleshooting Guide
- 130 -
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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