LG MULTI V IV ARNU07GTU 2 Series - Page 136

Troubleshooting Guide
- 136 -
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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 kΩ over (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
194*
Master
1941
Slave1
1942
Slave2
1943
Slave3
1944
Outdoor unit Fan PCB
heatsink temperature
sensor error
Outdoor unit Fan PCB
heatsink temperature
sensor error
1. Defective temperature sensor connection
2. Defective temperature sensor (Open / Short)
3. Defective outdoor unit PCB