LG General Wall Mounted-Inverter Type Svc Manual page 56

Part 4 Trouble Shooting
I Troubleshooting Guide(18,24,30kBtu/h Model)
1) Troubleshooting CH01, CH02, CH06
Error
Title
code
Indoor air sensor
01
Indoor inlet pipe sensor
02
06
Indoor outlet pipe sensor
Check Point
1. Unplug the sensor on Indoor unit PCB.
2. Estimate the resistance of each sensor.
3. If the resistance of the sensor is 10kΩ/ 5kΩ at 25°C(77°F), then sensor is normal.
4. If the resistance of the sensor is 0 kΩ or ∞, then sensor is abnormal. ¡ Change the sensor.
5. Plug the sensor on Indoor unit PCB and Power ON.
6. Estimate the voltage of each sensor.
7. If the voltage of the sensor is 2.5VDC at 25°C(77°F), then sensor is normal.
8. If the resistance of the sensor is 0 or 5VDC, then sensor is abnormal. ¡ Repair or Change the PCB.
56 Room Air Conditioner
Cause of error
• Open / Short
• Soldered poorly
• Internal circuit error
• Open / Short
• Soldered poorly
• Internal circuit error
• Open / Short
• Soldered poorly
• Internal circuit error
Ω
10k
Ω
Check the resistance
Check point & Normal condition
Normal resistor : 10kΩ/ at 25°C(77°F) (Unplugged)
Normal voltage : 2.5VDC / at 25°C(77°F) (plugged)
Normal resistor : 5kΩ/ at 25°C(77°F) (Unplugged)
Normal voltage : 2.5VDC / at 25°C(77°F) (plugged)
Normal resistor : 5kΩ/ at 25°C(77°F) (Unplugged)
Normal voltage : 2.5VDC / at 25°C(77°F) (plugged)
2.5VDC
V
Check the voltage