16.3 Diagnosis and Solution
16.3.1 EEPROM error diagnosis and solution (E0/F4)
Malfunction decision
conditions
Indoor or outdoor PCB main chip does not receive feedback
from EEPROM chip.
● Installation mistake
● PCB faulty
Trouble shooting:
Yes
Replace the indoor/outdoor
main PCB.
Power off, then restart the
unit 2 minutes later.
EEPROM: An electrically erasable programmable read-only memory whose contents can be erased
and reprogrammed using a pulsed voltage.
Note: The two photos above are only for reference, it’s may be not same totally with the ones on
your side.
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