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17.4.2 H14 (Indoor Unit Intake Air Temperature Sensor Error)
Troubleshooting
Diagnosis Procedures and Cause
Measures to be Taken
For some models, the sensor is not connected by a connector but it is directly soldered to the board.
In this case, replace the control board.
No abnormality is observed
No abnormality is observed
Below 46°C
Disconnection/Imperfect
connection of the connector
46°C and above
An abnormality is
observed
Check the ambient temperature of the indoor unit during operation.
Improve the ambient temperature.
Fix the problem.
Replace the indoor unit intake air
temperature sensor.
Replace the indoor unit control board.
Check for bad connection of the connector of the indoor unit intake air
temperature sensor.
Check for the characteristics of the sensor.
Refer to the characteristic table for electronic circuit diagram.
(Remove the connector and check the resistance value of the sensor.)
-10
0
10 20
30 40
50
0
10
20
30
40
50
60
70
Sensor (Thermistor)
Characteristics
1
2
1 Pipe Temp. Sensor
2 Intake Air Temp. Sensor
Resistance (kΩ)
Temperature (°C)
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