Midea MV5-X252W/V2GN1 Service Manual page 57

V5 X VRF 50/60Hz
4.5 E4, E7 Troubleshooting
4.5.1 Digital display output
4.5.2 Description
 E4 indicates an outdoor ambient temperature sensor error.
 E7 indicates a compressor top temperature sensor or discharge pipe temperature sensor error.
 All units stop running.
 Error code is only displayed on the unit with the error.
4.5.3 Possible causes
 Temperature sensor not connected properly or has malfunctioned.
 Damaged main PCB.
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