Panasonic CS-PS9JKT, Service Manual

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14.4.15 F11 (Indoor Pipe Temperature Sensor Abnormality)
Malfunction Decision Conditions
•
When cooling operation, when indoor pipe temperature or indoor heat exchanger temperature sensor is above
45°C
Malfunction Caused
•
Faulty connector connection.
•
Faulty indoor pipe temperature sensor.
•
Faulty indoor main PCB.
Troubleshooting
Sensor (Thermistor)
Characteristics
70
60
50
R
esi
st
an
ce
(k
Ω
)
Temperature (ºC)
40
30
20
10
-10 0 10 20 30 40 50
0
1 Pipe temp. Sensor
2 Intake Air Temp. Sensor
1
2
When abnormality indication starts again
Does it cable connection loose or connector broken?
Check the indoor pipe temperature sensor connection.
•
Correct loose or broken cable / connector
YES
For safety reason and to prevent
component breakdown, always switch
off the power before remove and
connect the component.
Check the indoor pipe temperature characteristic.
Does it conform to specification?
•
Replace the indoor pipe temperature
sensor
NO
NO
The problem still occur after replacing the
sensor. •
Replace the indoor main PCB
YES