Service Manual

34
9.3.5 Open circuit or short circuit of temperature sensor diagnosis and solution (E5)
Error Code
E4/E5/F1/F2/F3
Malfunction decision
conditions
If the sampling voltage is lower than 0.06V or higher than 4.94V, the
LED will display the failure.
Supposed causes
● Wiring mistake
● Sensor faulty
● PCB faulty
Trouble shooting:
Check the connection
between temperature
sensor and PCB.
Correct the connectionNo
Yes
Replace indoor or outdoor
main PCB
Measure the resistance
value of the sensor
Repalce the sensorNo
Yes