w w w . i n n o v a i r . c o m
DELUXE
Inverter
Service
M
anual
（
1
）
E1- internal temperature sensor error
Explanation of
error
Cause:
The detection of short circuit or open circuit of internal temperature
sensor during the inspection of main control panel in the internal machine,
indicated by “internal temperature sensor error”.
Inspection path:
Sensor→Sensor wire→Connectors→Main internal control
panel
Tools required
for inspection
Multimeter, 15KΩ standard sensor
（
25
℃
）
Frequent
problematic part
Internal temperature sensor, main internal control panel
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
℃
for frequency conversion machine)
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 control panel is loose, and pull the
terminal slightly for inspection if necessary.
4. Check whether the sensor is affected with
humidity
.
5. In case no standard sensor is available at present, replace the internal
temperature sensor
with a generic
sensor
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.
Special attention
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 le
a
d
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 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.
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