Carrier 42QHF009DS - Page 65

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12.3.2 For the outdoor unit
12.3.2 1 Outdoor EEPROM malfunction(ODU E0)
If the EEPROM chip
is welded on PCB,
replace the PCB
directly. Otherwise,
check whether the
EEPROM chip
plugged in PCB well?
Yes
No
Yes
Insert the EEPROM well
Replace the outdoor main board
Outdoor EEPROM malfunction
EEPROM: An electrically erasable programmable read-only memory whose contents can be erased and
reprogrammed using a pulsed voltage.
12.3.2.2 Communication malfunction between IPM board and outdoor main board(ODU E3)