Panasonic CS-CZ35ZKE - H27: Outdoor Air Temperature Sensor Error

96
17.5.8 H27 (Outdoor Air Temperature Sensor Abnormality)
Malfunction Decision Conditions
 During startup and operation of cooling and heating, the temperatures detected by the outdoor air temperature
sensor are used to determine sensor errors.
Malfunction Caused
 Faulty connector connection.
 Faulty sensor.
 Faulty PCB.
Troubleshooting
Sensor (Thermistor)
Characteristics
70
60
50
Resistance (k
Ω
)
40
30
20
10
0
Tem pe rat u re (ºC )
-10 0 10 20 30 40 50
1OutdoorAirSensor
2 Outdoor Heat Exchanger
Sensor
1
2
When abnormality indication starts again
Check the outdoor air temperature sensor:
● Plug out connector from the outdoor unit PCB
● Measure the resistance of the outdoor air temperature
sensor
Is the measured resistance of the outdoor air temperature
sensor matches the value specified in its characteristic
chart?
● Defect in outdoor air temperature sensor
● Replace the outdoor air temperature sensor
● Defect in outdoor unit PCB
● Replace the outdoor unit PCB
For safety reason and to prevent component
breakdown, always switch off the power
before remove and connect the component.
Check the connector connection:
● Turn off the power
● Check the connector connection
Is the connector connection normal?
YES
● Connector poor contact
● Correct the connection
NO
YES
NO
Caution