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CS-Z25UD3EAW CS-Z35UD3EAW CS-Z50UD3EAW CS-Z60UD3EAW CU-Z25UBEA CU-Z35UBEA CU-Z50UBEA CU-Z60UBEA
Pages
127
Size
22.46 MB
Type
PDF
Document
Service Manual
Brand
Device
Air Conditioner / AIR CONDITIONER
File
cs-z25ud3eaw-cs-z35ud3eaw-cs-z50ud3eaw-cs-z60ud3ea.pdf
Date
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Panasonic CS-Z25UD3EAW / CS-Z35UD3EAW / CS-Z50UD3EAW / CS-Z60UD3EAW / CU-Z25UBEA / CU-Z35UBEA / CU-Z50UBEA / CU-Z60UBEA Service Manual ▷ View online

101 
18.4.7  H23 (Indoor Pipe Temperature Sensor Abnormality) 
Malfunction Decision Conditions 
  During startup and operation of cooling and heating, the temperatures detected by the indoor heat exchanger 
temperature sensor are used to determine sensor errors. 
 
Malfunction Caused 
 Faulty 
connector 
connection. 
 Faulty 
sensor. 
 Faulty 
PCB. 
 
Troubleshooting 
 
 
 
 
 
 
 
 
 
 
 
 
 
102 
18.4.8  H24 (Indoor Pipe Temperature Sensor 2 Abnormality) 
Malfunction Decision Conditions 
  During startup and operation of cooling and heating, the temperatures detected by the indoor heat exchanger 
temperature sensor 2 are used to determine sensor errors. 
 
Malfunction Caused 
 Faulty 
connector 
connection. 
 Faulty 
sensor. 
 Faulty 
PCB. 
 
Troubleshooting 
 
When abnormality indication starts again.
For safety reason and to prevent component
breakdown, always switch off the power
before remove and connect the component.
Connector poor contact.
Correct the connection.
Defect in outdoor unit PCB.
Replace the outdoor unit PCB.
Defect in outdoor intake air temperature sensor.
Replace the outdoor intake air temperature
sensor.
NO
NO
YES
YES
Check the connector connection:
Plug out connector from the indoor unit PCB.
Is the connector connection normal?
Measure the resistance of the indoor pipe temperature
sensor.
Check the outdoor air temperature sensor:
Is the measured resistance of the outdoor intake air
temperature sensor matches the value specified in its
characteristic chart?
Plug out connector from the outdoor unit PCB.
Measure the resistance of the outdoor intake air
temperature sensor.
Caution
Sensor (Thermistor)
Characteristics
70
60
50
R
e
s
is
ta
n
ce
(k
Ω
)
Temperature °C (°F)
40
30
20
10
-10
(14)
0
(32)
10
(50)
20
(68)
30
(86)
40
(104)
50
(122)
0
1 Pipe temp. Sensor
2 Intake Air Temp. Sensor
1
2
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
103 
18.4.9  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 
 
 
 
 
 
 
 
 
 
 
 
104 
18.4.10  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 
 
 
 
 
 
 
 
 
 
 
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