LG Single A Svc Manual page 69

5. Trouble Shooting
6.6 Check code Trouble shooting CH01, CH02, CH06
Display
Title
code
Indoor air sensor
01
Indoor inlet pipe sensor
02
Indoor outlet pipe sensor
06
Check Flow Chart
Unplug the sensor
on Indoor unit PCB
Check the
Connector connection
Is it normal ?
Yes
Estimate the resistance
of each sensor.
Is the resistance of
the sensor 10Ω /
5kΩ at 25˚C?
Yes
Plug the sensor
on Indoor unit PCB
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Only for training and service purposes
Cause of error
• 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)
No
Correct connection
No
Correct connection
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Check point & Normal condition
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.
Estimate the Voltage
of each sensor.
Is the voltage of
the sensor 2.5Vdc
at 25˚C
Yes
Repair or Change the PCB.
Unplugged
Ω
10k
Ω
Check the resistance
No
Correct connection
Plugged
2.5Vdc
V
Check the voltage
LGE Internal Use Only