LG R410A Service Manual page 127

Error
Error Contents
Code
01 Indoor Unit room temp.sensor error
02 Unit inlet pipe temp.sensor error
(Indoor Unit)
06 Outlet pipe temp. sensor error
(Indoor Unit)
I Defect inspection method :
1) Check the connecting point of the sensor with the PCB (Sensor's Connector).
Is the sensor connecting condition correct ? Otherwise, reconnect the sensor at the correct position.
2) Remove the sensor and measure its resistance with a tester.
Room temp sensor : 10°C = 20.7kΩ : 25°C = 10kΩ : 50°C = 3.4kΩ
Pipe temp sensor : 10°C = 10kΩ : 25°C= 5kΩ : 50°C = 1.8kΩ
3) Replace the sensor if it is not having a correct resistance value.
4) If there is no problem with the sensor and the sensor connection then replace the Indoor Unit PCB.
• Panel Display indication method : Error code and the LED blinking counts are indication.
Error
Error Contents
Code
Communication error
between Indoor Unit and
03
the Wired Remote
Controller
I Defect inspection method :
1) Check the connection point of the Wired Remote Controller (Connecting Connector).
2) In case the Wired Remote Controller's cable is installed near the AC power line, then they must be separated by
distance of at least 30cm.
3) In case the replaced Remote Controller has no defect, then the originally installed Remote Controller is defec-
tive.
4) In case the error code exists even after the replacement of the Remote Controller, then the Remote Controller is
not defective and hence only Indoor Unit PCB should be replaced.
5) In case error code exists even after the replacement of the Wired Remote Controller and the Indoor Unit PCB,
then replace the cable connecting the Wired Remote Controller and Indoor Unit.
Meaning
Indoor Unit
sensor open
or short
Meaning
1. Defective wired Remote controller.
In case the wired
2. Defective Indoor Unit PCB .
Remote Controller
3. Defective Connector connection
cant receive the
the signal from the
4. Defective wire of the Wired Remote
Indoor Unit
Controller
Troubleshooting Guide
Main Causes
1. Sensor wrong connection
2. Sensor open/Short
3. Defective Indoor Unit PCB
4. Defective Sensor
Main Causes
Service Manual 127
Error display
position
Concerned
Remote con-
troller
Panel Display
Error display
position
Concerned
Remote
Controller
Panel Display