LG LMU240HE Service Manual - Page 75

Service Manual, Troubleshooting Guide

Get LG LMU240HE PDF manuals and user guides View all LG LMU240HE manuals
Add to My Manuals
Save this manual to your list of manuals

Page 75 highlights

Error code Title 44 Outdoor air sensor 45 Condensor pipe sensor 47 D-Pipe sensor Troubleshooting Guide Cause of error • Open / Short • Soldered poorly • Internal circuit error • Open / Short • Soldered poorly • Internal circuit error • Open / Short • Soldered poorly • Internal circuit error 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 : 200KΩ/ at 25°C(77°F) (Unplugged) Normal voltage : 4.5Vdc / at 25°C(77°F) (plugged) Ω Ω Check the resistance ❑ 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 Service Manual 75

  • 1
  • 2
  • 3
  • 4
  • 5
  • 6
  • 7
  • 8
  • 9
  • 10
  • 11
  • 12
  • 13
  • 14
  • 15
  • 16
  • 17
  • 18
  • 19
  • 20
  • 21
  • 22
  • 23
  • 24
  • 25
  • 26
  • 27
  • 28
  • 29
  • 30
  • 31
  • 32
  • 33
  • 34
  • 35
  • 36
  • 37
  • 38
  • 39
  • 40
  • 41
  • 42
  • 43
  • 44
  • 45
  • 46
  • 47
  • 48
  • 49
  • 50
  • 51
  • 52
  • 53
  • 54
  • 55
  • 56
  • 57
  • 58
  • 59
  • 60
  • 61
  • 62
  • 63
  • 64
  • 65
  • 66
  • 67
  • 68
  • 69
  • 70
  • 71
  • 72
  • 73
  • 74
  • 75
  • 76
  • 77
  • 78
  • 79
  • 80
  • 81
  • 82
  • 83
  • 84
  • 85
  • 86
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
Ω
/ at 25
°
C(77
°
F) (Unplugged)
Normal voltage : 2.5Vdc / at 25
°
C(77
°
F) (plugged)
Normal resistor : 5K
Ω
/ at 25
°
C
(77
°
F)
(Unplugged)
Normal voltage : 2.5Vdc / at 25
°
C
(77
°
F)
(plugged)
Normal resistor : 200K
Ω
/ 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
Ω
Ω