Midea MSV1I-09HRDN1 Technical & Service Manual page 25

Display
E4
Is connection to connector of pipe temp. sensor good?
Yes
Check the resistance of the temp. sensor according to Annex 1
Replace the sensor
Display
E5
Check the voltage of power supply, if the voltage is about 220V, turn off the
power supply to indoor unit and turn it on again after 1 minute
Does the trouble occur again?
Check the voltage of secondary of T3 transformer in outdoor power board,
is this voltage 12-14V (AC)
Replace the outdoor power board
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Outdoor units temp. sensor or connector of temp. sensor is defective
Compressor voltage protection
Yes
No
LED STATUS
LED STATUS
25
No
Repair connector