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5 Open circuit or short circuit of temperature sensor diagnosis and solution (E4/E5/F1/F2/F3)
Error Code
Malfunction decision
conditions
Supposed causes
Check the connection
between temperature
sensor and PCB.
Measure the resistance
value of the sensor
Replace indoor or outdoor
main PCB
E4/E5/F1/F2/F3
If the sampling voltage is lower than 0.06V or higher than 4.94V, the LED
will display the failure.
Wiring mistake
●
Sensor faulty
●
Yes
Yes
No
Correct the connection
No
Repalce the sensor
8
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