Eeprom Parameter Error Diagnosis And Solution; Outdoor Pcb (18K Model) - Carrier 38MAQB12-1 Service Manual

DIAGNOSIS AND SOLUTION
EEPROM Parameter Error Diagnosis and Solution (E0/F4)
Error Code
Malfunction decision conditions
Supposed causes
Troubleshooting
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. 29.
NOTE: Fig. 29 is for reference only and the PCB pictured may differ from the actual unit.
E0/F4
Indoor or outdoor PCB main chip does not receive feedback from the EEPROM chip.
·Installation mistake
·PCB faulty
Power off, then restart the
unit 2 minutes later.
Yes
Replace the indoor/outdoor
main PCB.
Fig. 29 – Outdoor PCB (18K Model)
29