LG Single A Svc Manual page 86

6.23 Check code Trouble shooting CH61, CH62
Display
Title
code
Condenser
61 pipe sensor
temp. high
Heat sink sensor
62
temp. high
Check Flow Chart
Check Over load condition
- Refrigerant leakage
- Condenser is blocked
- Outdoor fan is locked
Yes
Unplug the sensor
on Outdoor unit PCB
Check the
Connector connection
Is it normal ?
Yes
Estimate the resistance
of each sensor.
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Only for training and service purposes
Cause of error
• condenser pipe
sensordetected high
temp.(65˚C)
• heat sink sensor
detected high temp.
(85˚C)
No
Remove obstruction
Change outdoor fan
or motor
Change refrigerant
No
Correct connection
- 85 -
Check point & Normal condition
• Check the load condition.
• Check the sensor of Condenser pipe sensor.
• Normal resistor : 5KΩ/ at 25˚C (Unplugged)
• Normal voltage : 2.5Vdc / at 25˚C (Plugged)
• Check the load condition.
• Check the sensor of heat sink.
• Normal resistor : 10KΩ/ at 25˚C (Unplugged)
• Normal voltage : 2.5Vdc / at 25˚C (Plugged)
Is the resistance of
the Sensor is 5kΩ
/10kΩ at 25˚C?
Yes
Plug the sensor
on Indoor unit PCB
Estimate the Voltage
of each sensor.
Yes
Is the voltage of the
sensor is 4.5Vdc /
2.5Vdc at 25˚C
Yes
Repair or Change the PCB.
5. Trouble Shooting
No
Change the sensor
No
Change the sensor
LGE Internal Use Only