Midea MCA3U-09HRFN1-M(C)

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17.4.21 Communication Malfunction between Indoor Unit and auto-lifting Panel (F7)
Malfunction decision conditions
Indoor PCB does not get the feedback from the PCB of auto
lifting-panel
Possible causes
● Wiring mistake between indoor PCB and
auto-lifting panel
● Faulty PCB of auto-lifting panel
● Faulty indoor PCB
Communication malfunction between indoor
unit and auto-lifting panel
Communication malfunction between indoor
unit and auto-lifting panel
NO
Replace the indoor main PCB
Replace the indoor main PCB
is it in working order?
is it in working order?
YES
Has the problem been solved?
Has the problem been solved?
Check the wire connection between auto-
lifting panel and indoor unit
Check the wire connection between auto-
lifting panel and indoor unit
Replace the main control of auto-lifting panel.
Replace the main control of auto-lifting panel.
Correct the connection
Correct the connection NO