Midea MS9A-07HRN1-QB6 - Page 54

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9.2.4 EEPROM parameter error diagnosis and solution
Is the EEPROM chip
plugged in PCB well?
Yes
No
Yes
Correct the connection.
Replace the indoor PCB.
Shut off the power supply and
turn it on 5 seconds later. Is it
still displaying the error code?
9.2.5 Zero crossing detection error diagnosis and solution
Check if the connections and
power supply is normal?
Correct the connections. Turn on the
unit when the power supply is good.
No
Yes
Indoor PCB is defective.
Replace indoor PCB.