Daikin FTX25JVEA9 Service Manual page 293

Troubleshooting - Outdoor Unit Related
3.3.18 Faulty BP Gas Pipe Thermistor
J9
Outdoor Unit
Indication
Method of
Malfunction
Detection
Malfunction When the BP gas pipe temperature sensor became short-circuited or open.
Decision
Conditions
"
Supposed
"
Causes
Troubleshooting
280
Faulty BP gas pipe temperature sensor
Faulty connectors connection of BP gas 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 board
and measure the resistance of
gas 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
8 60°C
9 70°C
NO
B
7kΩ
5kΩ
3kΩ
Si18-201
Replace thermistor or
thermistor assembly.
If insufficient contact is not
detected, replace the
corresponding PC board.
Service Diagnosis
(MF037)