Midea M2OC-18HFN1-M Service Manual page 57

9.4.2 Outdoor unit trouble shooting
9.4.2.1 E0(Outdoor EEPROM malfunction) error diagnosis and solution
Error Code
Malfunction decision
conditions
Supposed causes
Trouble shooting:
Outdoor EEPROM malfunction
Replace the outdoor main board
EEPROM: a read-only memory whose contents can be erased and reprogrammed using a pulsed voltage.
For the location of EEPROM chip, please refer to the below photos.
E0
PCB main chip does not receive feedback from EEPROM chip
● Installation mistake
● PCB faulty
Yes
If the EEPROM chip
is welded on PCB,
replace the PCB
directly. Otherwise,
check whether the
EEPROM chip
plugged in PCB well?
Yes
Outdoor PCB(M3OC-30HRFN1-M)
No Insert the EEPROM well