Midea MSMBA-07HRN1 - Page 50

Mission On-off DM16-01.01.21en
50 Service manual
10.2.6 Indoor / outdoor unit’s communication diagnosis and solution(E9)
Error Code
E9
Malfunction decision
conditions
Indoor unit does not receive the feedback from outdoor unit during
120 seconds.
Supposed causes ● Wiring mistake
● Indoor or outdoor PCB faulty
Trouble shooting: