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17.4.9 H28 (Outdoor Pipe Temperature Sensor Abnormality)
Malfunction Decision Conditions
During startup and operation of cooling and heating, the temperatures detected by the outdoor pipe temperature
sensor are used to determine sensor errors.
Malfunction Caused
Faulty connector connection.
Faulty sensor.
Faulty PCB.
Troubleshooting
Sensor (Thermistor)
Characteristics
70
60
50
R
e
si
st
a
n
ce
(kΩ
)
40
30
20
10
0
Temperature (ºC)
-10
0
10
20
30
40
50
1 Outdoor Air Sensor
2 Outdoor Heat Exchanger
Sensor
1
2
Is the measured resistance of the outdoor heat exchanger
temperature sensor matches the value specified in its
characteristic chart?
YES
When abnormality indication starts again
Check the outdoor heat exchanger temperature sensor:
●
Plug out connector from the outdoor unit PCB
●
Measure the resistance of the outdoor heat exchanger
temperature sensor
●
Defect in outdoor heat exchanger
temperature sensor
●
Replace the outdoor heat exchanger
temperature sensor
●
Defect in outdoor unit PCB
●
Replace the outdoor unit PCB
Check the connector connection:
●
Turn off the power
●
Check the connector connection
Is the connector connection normal?
●
Connector poor contact
●
Correct the connection
No
YES
No
Caution
For safety reason and to prevent
component breakdown, always switch
off the power before remove and
connect the component.
Содержание CS-HZ9RKE-1
Страница 28: ...28 11 1 4 Receiver Printed Circuit Board CN RCV 11 1 5 Fuse Printed Circuit Board ACL501 ACN501 ACL502 ACN502 ...
Страница 117: ...117 18 1 1 4 To remove control board Figure 6 18 1 1 5 To remove cross flow fan and indoor fan motor Figure 7 ...
Страница 118: ...118 Figure 8 Figure 9 ...
Страница 119: ...119 Figure 10 ...