AUX ASW-H09B5B4/FAR3DI-C3, Service Manual

Page: 49 / 101

46
（
15
）
F6- Outdoor Unit temperature sensor error
Explanation of
error
Cause: The detection of short circuit or open circuit of Outdoor Unit
termperature sensor during the inspection of Outdoor Unit main PCB,
indicated by "Outdoor Unit termperature sensor error".
Inspection path:
Sensor→Sensor wire→Connectors→Outdoor Unit
main PCB
Tools required
for inspection
Multimeter, 15KΩ standard sensor （
25
℃ ）
Frequent
problematic part
Outdoor Unit temperature sensor, Outdoor Unit main PCB.
Inspection
procedure and
key points
1. Check whether there’s resistance problem, short circuit or open
circuit in the sensor; the resistance value shall be within a reasonable
range (15KΩ under the temperature of 25
℃
).
2. Check whether the sensor wire is broken.
3. Check whether the terminal connectors are well fixed; check
whether the weld between the terminal and the main PCB is loose, and
pull the terminal slightly for inspection if necessary.
4. Check whether the sensor is affected with damp.
5. In case no standard sensor is available at present, replace the
Outdoor Unit temperature sensor with the other sensor asides, and then
check whether the error still exists; if the error disappears, replace the
sensor; if the error still exists, it's possible that the main PCB is faulted,
change the Outdoor Unit main PCB.
Special attention
Most of the standard resistance values of the Outdoor Unit temperature
sensors are 15KΩ (hen temeperature is at 25
℃
), and the higher the
temeprautre is, the lower the resistance value is, and the lower the
temperature is, the higher the resistance value is. Do not use improper
sensor during repairing and maintenance, or it may led to the wrong
temperature sensing of the machine.