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E2 – EXTERNAL COIL SENSOR ERROR
Cause of Error
Tools Required
Possible Broken Part
Troubleshooting
Procedures
Key Details
Cause: The unit detects a short circuit or open circuit of the
outdoor unit coil sensor during the inspection of the outdoor
unit control panel, indicated by "external coil sensor error".
Inspection path: Sensor → Sensor wire → Connectors →
Main outdoor unit control panel
Multimeter, 20KΩ standard sensor (25℃）
External coil sensor, outdoor unit control panel
Check if there's resistance problem, short circuit or open
1.
circuit in the sensor; the resistance value should be
within a reasonable range (15KΩ under the temperature
of 25℃)
Check if the sensor wire is broken.
2.
3.
Check if the terminal connectors are well fixed; check if
the weld between the terminal and the main control panel
is loose and pull the terminal slightly for inspection if
necessary.
Check if the sensor is damp/wet.
4.
5.
If no standard sensor is available, replace the internal
temperature sensor, and then check if the error persists;
if yes, check the main internal control panel and replace
it.
DO NOT USE A SENSOR WITH A VALUE LOWER OR
HIGHER THAN 20KΩ
5
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