LG Electronics A3UH363FA0(LMU360HE) Air Conditioner User Manual


 
Service Manual 75
Troubleshooting Guide
Error
Title Cause of error Check point & Normal condition
code
44 Outdoor air sensor
45 Condensor pipe sensor
47 D-Pipe sensor
Open / Short
Soldered poorly
Internal circuit error
Open / Short
Soldered poorly
Internal circuit error
Open / Short
Soldered poorly
Internal circuit error
Normal resistor : 10K / at 25°C(77°F) (Unplugged)
Normal voltage : 2.5Vdc / at 25°C(77°F) (plugged)
Normal resistor : 5K/ at 25°C
(77°F)
(Unplugged)
Normal voltage : 2.5Vdc / at 25°C
(77°F)
(plugged)
Normal resistor : 200K/ at 25°C
(77°F)
(Unplugged)
Normal voltage : 4.5Vdc / at 25°C
(77°F)
(plugged)
Check Point
1. Estimate the resistance of each sensor.(Unplugged)
2. Estimate the voltage of each sensor.(Plugged)
3. If the resistance is 0V or 5Vdc, then sensor is abnormal
Check the resistance