Midea MV5-X252W/V2GN1 - 4.3 E1 Troubleshooting; 4.3.1 Digital display output; 4.3.2 Description; 4.3.3 Possible causes

V5 X VRF 50/60Hz
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Midea V5 X Series Service Manual
4.3 E1 Troubleshooting
Digital display output 4.3.1
Description 4.3.2
 Phase sequence error.
 All units stop running.
 Error code is only displayed on the unit with the error.
Possible causes 4.3.3
 Power supply phases not connected in correct sequence.
 Power supply terminals loose.
 Power supply abnormal.
 Main PCB damaged.