LG Multi-Inverter Service Manual page 70

Display
Title
code
41
D-pipe sensor (Inverter)
44
Air sensor
45 Condenser Pipe sensor
Suction Pipe sensor
46
D-pipe sensor (Constant)
47
Heat sink sensor
65
Ω
Copyright ©2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Cause of error
• Open / Short
• Soldered poorly
• Internal circuit error
• Open / Short
• Soldered poorly
• Internal circuit error
• Open / Short
• Soldered poorly
• Internal circuit error
• Open / Short
• Soldered poorly
• Internal circuit error
• Open / Short
• Soldered poorly
• Internal circuit error
• Open / Short
• Soldered poorly
• Internal circuit error
Check Point
1. Estimate the resistance of each sensor.(Unplugged)
2. Estimate the voltage of each sensor.(Plugged)
3. If the resistance of the sensor is 0 kΩ or ∞, then sensor is abnormal.
If the voltage of the sensor is 0 V or 5Vdc, then sensor is abnormal.
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4. Trouble Shooting
Check point & Normal condition
• Normal resistor : 200KΩ / at 25°C (Unplugged)
• Normal voltage : 4.5Vdc / at 25°C (plugged)
• Normal resistor : 10KΩ / at 25°C (Unplugged)
• Normal voltage : 2.5Vdc / at 25°C (plugged)
• Normal resistor : 5KΩ / at 25°C (Unplugged)
• Normal voltage : 2.5Vdc / at 25°C (plugged)
• Normal resistor : 5KΩ / at 25°C (Unplugged)
• Normal voltage : 2.5Vdc / at 25°C (plugged)
• Normal resistor : 200KΩ / at 25°C (Unplugged)
• Normal voltage : 4.5Vdc / at 25°C (plugged)
• Normal resistor : 10KΩ / at 25°C (Unplugged)
• Normal voltage : 2.5Vdc / at 25°C (plugged)
LGE Internal Use Only