Carrier 38QUS012D8S - Page 121

Troubleshooting
Electrical Control System 119
2.4.4 Outdoor Units
2.4.4.1. Compressor Driven Chip EEPROM Malfunction
Malfunction conditions
Main PCB chip does not receive feedback from EEPROM chip
Possible causes
● Installation mistakes
● Faulty PCB
Yes
Replace the outdoor main
PCB
Replace the outdoor main
PCB
Power off, then restart the
unit 2 minutes later. Does the
malfunction still remain?
Power off, then restart the
unit 2 minutes later. Does the
malfunction still remain?
Compressor driven chip
EEPROM malfunction
Compressor driven chip
EEPROM malfunction