Midea MOBA30U-12HN1-Q Service Manual page 246

Troubleshooting
For Floor-standing type:
Codes Contents
Indoor evaporator temperature protection
P4
Outdoor condenser temperature protection
P5
P9 Anti-cold wind(for S2, it means defrosting)
T1 temperature sensor open or short circuit
E1
T2 temperature sensor open or short circuit
E2
T3 temperature sensor open or short circuit
E3
E6 Outdoor unit malfunction
HS Defrosting
P0 Communication malfunction between indoor main PCB and display PCB(J2,S4)
242 Electrical Control