Daikin FTX25JVEA9 Service Manual page 288

Si18-201
3.3.13 Faulty Discharge Thermistor
J3
Outdoor Unit
Indication
Method of
Malfunction
Detection
Malfunction When the discharge temperature sensor became short-circuited or open.
Decision
Conditions
"
Supposed
"
Causes
Troubleshooting
Service Diagnosis
Faulty discharge temperature sensor
Faulty connectors connection of discharge 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 discharge
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
Troubleshooting - Outdoor Unit Related
Replace thermistor or
thermistor assembly.
If insufficient contact is not
detected, replace outdoor
unit PC board.
(MF032)
275