E1- Internal Temperature Sensor Error - Toyotomi KURO Mini Service Manual

（1）E1- internal temperature sensor error
Cause: The detection of short circuit or open circuit of internal
temperature sensor during the inspection of main control panel in the
Explanation of
internal machine, indicated by "internal temperature sensor error".
error
Inspection path: Sensor→Sensor wire→Connectors→Main internal
control panel
Tools required
Multimeter, 15KΩ standard sensor（25℃）
for inspection
Frequent
Internal temperature sensor, main internal control panel
problematic part
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℃ for frequency conversion
machine)
2. Check whether the sensor wire is broken.
3. Check whether the terminal connectors are well fixed; check
Inspection
whether the weld between the terminal and the main control panel is
procedure and
loose, and pull the terminal slightly for inspection if necessary.
key points
4. Check whether the sensor is affected with damp.
5. In case no standard sensor is available at present, replace the internal
temperature sensor by other sensor asides, and then check whether the
error still exists; if the error disappears, replace the sensor; if the error
still exists, check the main internal control panel and change if
necessary.
Most internal temperature sensors of the frequency conversion
machine have a resistance value of 15KΩ.
Do not use improper sensor during repairing and maintenance, or it
may led to the wrong temperature sensing of the machine, the start
error or shutdown error. You can switch the air conditioner to the
"Blowing" mode, and judge the accuracy of sensor though
environmental temperature displayed on the screen.
In case a sensor with the resistance value over 15KΩ is used, the
Special attention
detected temperature will be much lower than the actual temperature,
which may lead to the shutdown error under heating mode, or the
startup error under cooling mode.
In case a sensor with the resistance value below 15KΩ is used, the
detected temperature will be much higher than the actual temperature,
which may lead to the startup error under heating mode, or the
shutdown error under cooling mode.
1