Daikin FTX25JVEA9 Service Manual page 291

Troubleshooting - Outdoor Unit Related
3.3.16 Faulty of Liquid Pipe Thermistor
J7
Outdoor Unit
Indication
Method of
Malfunction
Detection
Malfunction When the liquid pipe temperature sensor became short-circuited or open.
Decision
Conditions
"
Supposed
"
Causes
Troubleshooting
278
Faulty liquid pipe temperature sensor
Faulty connectors connection of liquid pipe temperature sensor
Be sure to turn off power switch before connect or disconnect connector,
Caution or parts damage may be occurred.
Disconnect the thermistor
connectors from outdoor unit
PC board and measure the
resistance of liquid pipe
temperature sensor.
Is the resistance
normal referring to the
table below?
YES
A
1 -10°C 117kΩ
2 0°C 67kΩ
3 10°C 40kΩ
4 20°C 25kΩ
5 30°C 16kΩ
6 40°C 10kΩ
7 50°C 7kΩ
8 60°C 5kΩ
9 70°C 3kΩ
NO
B
Si18-201
Replace thermistor or
thermistor assembly.
If insufficient contact is not
detected, replace outdoor
unit PC board.
(MF035)
Service Diagnosis