Service Manual 165
Troubleshooting Guide
Outdoor Unit air
temperature sen-
sor error
Error
Code
Error Contents Meaning Main Causes
Error display
position
44
Sensor measured value is
not normal
(Open/Short)
Concerned
Remote con-
troller
Panel Display
Outdoor unit
1. Defective connection of the temp.
sensor
2. Defective temp. sensor (Open /
Short)
3. Defective Outdoor Unit PCB
The pipe sensor
error of the
Outdoor Unit’s heat
exchanger
Error
Code
Error Contents Meaning Main Causes
Error display
position
45(Heat
exchanger
Upper parts)
48 (Heat
exchanger
Lower parts)
Sensor measured value is
not normal
(Open / Short)
Concerned
Remote con-
troller
Panel Display
Outdoor unit
1. Defective connection of the temp.
sensor
2. Defective temp. sensor (Open /
Short)
3. Defective Outdoor Unit PCB
Comp. suction
temp. sensor error
Error
Code
Error Contents Meaning Main Causes
Error display
position
46
Sensor measured value is
not normal
(Open/Short)
Concerned
Remote con-
troller
Panel Display
Outdoor unit
1. Defective connection of the temp.
sensor
2. Defective temp. sensor (Open /
Short)
3. Defective Outdoor Unit PCB
■ Defect inspection method s
1) Check the temp. sensor connecting condition and also the lead wire connecting condition.
2) Check whether the temp. sensor resistance value is normal ? Otherwise, replace the sensor.
- Air 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) In case the sensor connection and the resistance value is normal, then please replace the outdoor PCB .
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