Daikin FTX25JVEA9 Service Manual page 289

Troubleshooting - Outdoor Unit Related
3.3.14 Faulty of Suction Thermistor
J5
Outdoor Unit
Indication
Method of
Malfunction
Detection
Malfunction When the suction temperature sensor became short-circuited or open.
Decision
Conditions
"
Supposed
"
Causes
Troubleshooting
276
Faulty suction temperature sensor
Faulty connectors connection of suction 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 suction
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
PC board. (MF033)
Service Diagnosis