Midea MOU-36HFN1-M - Page 72

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16.3.4 Open circuit or short circuit of temperature sensor diagnosis and solution
(E4/E5/F1/F2/F3)
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.
Check the connection
between temperature
sensor and PCB.
Correct the connection
Correct the connectionNo
Yes
Replace indoor or outdoor main
PCB
Replace indoor or outdoor main
PCB
Measure the resistance value
of the sensor
Measure the resistance value
of the sensor
Repalce the sensor
Repalce the sensorNo
Yes