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9.3 Diagnosis and Solution
9.3.1 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 ● Installation mistake
● PCB faulty
Trouble shooting:
Yes
Replace the indoor/outdoor
main PCB.
Power off, then restart the
unit 2 minuteslater.
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.
Indoor PCB
Outdoor PCB(18k model)
Note: The two photos above are only for reference, it’s may be not same totally with the ones on
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