Troubleshooting Guide

6
Cause of Error
Cause: The detection of short circuit or open circuit of
internal coil sensor during the inspection of main internal
control panel, indicated by “internal coil sensor error”.
Inspection path: Sensor → Sensor wire → Connectors →
Main internal 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
E3 – INTERNAL COIL SENSOR ERROR