Carrier 40MKCF - Page 21

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2. --- EEPROM parameter error --- diagnosis and solution
Error Code E7
Malfunction conditions Indoor PCB main chip does not receive feedback from EEPROM chip.
Possible Causes
• Installation mistake
• Defective PCB
Troubleshooting:
If the EEPROM chip
is welded on main
PCB, replace the
main PCB directly.
Otherwise, check
whether the
EEPROM chip is
plugged into main PCB
well.
Yes
No
Yes
Correct the connection.
Replace the main PCB.
Shut off the power supply and
turn it on 5 seconds later. Is it
still displaying the error code?
A14480