Midea MV5-X252W/V2GN1 - 4.5 E4, E7 Troubleshooting; 4.5.1 Digital display output; 4.5.2 Description; 4.5.3 Possible causes

V5 X VRF 50/60Hz
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Midea V5 X Series Service Manual
4.5 E4, E7 Troubleshooting
Digital display output 4.5.1
Description 4.5.2
 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.
Possible causes 4.5.3
 Temperature sensor not connected properly or has malfunctioned.
 Damaged main PCB.