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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 the EEPROM chip.
Supposed causes
·Installation mistake
·PCB faulty
Troubleshooting
Yes
Replace the indoor/outdoor
main PCB.
Power off, then restart the
unit 2 minutes later.
EEPROM: A read−only memory whose contents can be erased and reprogrammed using a pulsed voltage. For the EEPROM chip location,
please refer to Fig 21 and Fig. 22.
Fig. 21 – Indoor PCB
Fig. 22 – Outdoor PCB (18K Model)
NOTE: The two photos above are for reference only and they may differ from the actual unit.
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