Midea MCH2U-18PHH2 Service Manual page 66

8.4.2.4 E4 (Outdoor temperature sensor (coil sensor T3,ambient sensor T4, Compressor discharge
sensor T5、indoor coil outlet pipe sensor T2B) malfunction) diagnosis and solution
F1/F2/F3/F4/F5 (No.A,B,C,D,E Indoor unit coil outlet temp. sensor malfunction) diagnosis and
solution.
.
Error Code
Malfunction
conditions
Potential causes
Trouble shooting:
E4/F1/F2/F3/F4/F5
If the sampling voltage is lower than 0.06V or higher than
4.94V, the LED will display the failure.
● Wiring mistake
● Faulty sensor
● Faulty PCB
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