Troubleshooting Guide

5
Cause of Error
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
Tools Required
Multimeter, 20KΩ standard sensor (25℃）
Possible Broken Part External coil sensor, outdoor unit control panel
Troubleshooting
Procedures
1. Check if
there’s resistance problem, short circuit or open
circuit in the sensor; the resistance value should be
within a reasonable range (15KΩ under the temperature
of 25℃)
2. Check if the sensor wire is broken.
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.
4. Check if the sensor is damp/wet.
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.
Key Details
DO NOT USE A SENSOR WITH A VALUE LOWER OR
HIGHER THAN 20KΩ
E2 – EXTERNAL COIL SENSOR ERROR