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Carrier 38MHRCQ12AA1 - DIAGNOSIS AND SOLUTION; EEPROM & Communication Errors

Carrier 38MHRCQ12AA1
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SG-38MHRC-01 Specifications subject to change without notice. 31
DIAGNOSIS AND SOLUTION
EEPROM Parameter Error (E0/F4)
Description: Indoor or outdoor PCB main chip does not receive feedback from the EEPROM chip.
Possible causes:
Installation mistake
Faulty PCB
Troubleshooting
Remarks:
A read-only memory whose contents can be erased and reprogrammed using a pulsed voltage. For the EEPROM chip location, refer to Figures
36 and 37.
Fig. 36 — Indoor PCB
Fig. 37 — Outdoor PCB
NOTE: Figures 36 and 37 are for reference only and they may differ from the actual unit.
Shut o the power. Wait two
minutes then turn the unit on.
YES
Replace the indoor/outdoor
main PCB.

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