LG Single "A" - Page 104

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Only for training and service purposes
LGE Internal Use Only
5. Trouble Shooting
6.20 Check code Trouble shooting CH41, CH44, CH45, CH46, CH47, CH65
41
47
44
45
46
65
D-pipe sensor(Inv)
D-pipe sensor(Cons)
Air sensor
Condenser Pipe sensor
Suction Pipe sensor
Heat sink
sensor
• Connector connection error
• Faulty PCB
• Faulty sensor (Open / Short)
• Connector connection error
• Faulty PCB
• Faulty sensor (Open / Short)
• Connector connection error
• Faulty PCB
• Faulty sensor (Open / Short)
• Connector connection error
• Faulty PCB
• Faulty sensor (Open / Short)
• Normal resistor : 200KΩ/ at 25˚C (Unplugged)
• Normal voltage : 4.5Vdc / at 25˚C (plugged)
• Refer to sensor resistance table.
• Normal resistor : 10KΩ/ at 25˚C (Unplugged)
• Normal voltage : 2.5Vdc / at 25˚C (plugged)
• Refer to sensor resistance table.
• Normal resistor : 5KΩ/ at 25˚C (Unplugged)
• Normal voltage : 2.5Vdc / at 25˚C (plugged)
• Refer to sensor resistance table.
• Normal resistor : 5KΩ/ at 25˚C (Unplugged)
• Normal voltage : 2.5Vdc / at 25˚C (plugged)
• Refer to sensor resistance table.
Display
code
Title Cause of error Check point & Normal condition
Ω
10kΩ
Unplugged Plugged
Check the resistance Check the voltage
V
2.5Vdc
Unplug the sensor
on Indoor unit PCB
Estimate the Voltage
of each sensor.
Is the voltage of the
sensor is 4.5Vdc /
2.5Vdc at 25˚C
Repair or Change the PCB.
Check the
Connector connection
Is it normal ?
Estimate the resistance
of each sensor.
Plug the sensor
on Indoor unit PCB
Is the resistance of the
Sensor is 200kΩ/10kΩ⁄
/5kΩ at 25˚C?
Yes
Yes
No
Correct connection
Yes
No
Change the sensor
No
Change the sensor
Check Flow Chart