Carrier 42QHC018DS series - Indoor EEPROM Malfunction E0

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18.3 Trouble shooting
18.3.1 For the indoor unit
18.3.1.1 Indoor EEPROM malfunction
Yes
Replace the indoor 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.