Daikin FTX25JVEA9 Service Manual page 292

Si18-201
3.3.17 Faulty BP Liquid Pipe Thermistor
J8
Outdoor Unit
Indication
Method of
Malfunction
Detection
Malfunction When the BP liquid pipe temperature sensor became short-circuited or open.
Decision
Conditions
"
Supposed
"
Causes
Troubleshooting
Service Diagnosis
Faulty BP liquid pipe temperature sensor
Faulty connectors connection of BP liquid pipe temperature sensor
Be sure to turn off power switch before connect or disconnect connector,
Caution or parts damage may be occurred.
Set the rotary switch to [01]
and specify the corresponding
BP unit.
Disconnect the thermistor
connectors from the
corresponding BP PC borad
and measure the resistance of
liquid tube 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
8 60°C
9 70°C
NO
B
7kΩ
5kΩ
3kΩ
Troubleshooting - Outdoor Unit Related
Replace thermistor or
thermistor assembly.
If insufficient contact is not
detected, replace the
corresponding PC board.
(MF036)
279