Carrier 40MAQB12B--3 - EEPROM Parameter Error Diagnosis (E0;F4); EEPROM Error Diagnosis and Solution

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Diagnosis and Solution
EEPROM parameter error -- diagnosis and solution (E0/F4)
Error Code E0/F4
Malfunction decision conditions Indoor or outdoor PCB main chip does not receive feedback from EEPROM chip.
Supposed Causes
S Installation mistake
S PCB faulty
Trouble shooting:
If the EEPROM chip
is welded on main
PCB, replace the
main PCB directly.
Otherwise, check
whether the
EEPROM chip is
plugged into main PCB
well.
Yes
No
Yes
Correct the connection.
Replace the main PCB.
Shut off the power supply and
turn it on 5 seconds later. Is it
still displaying the error code?
EEPROM: a read -- only memory whose contents can be erased and reprogrammed using a pulsed voltage.