Carrier 42LUVH045N - Indoor Unit Error Codes; Error Diagnosis and Solutions

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9.1 Indoor Unit Error Display
Display
LED STATUS
E0
EEPROM parameter error
E1
Indoor / outdoor units communication protection
E2
Zero-crossing signal error
E3
Fan speed out of control
E5
Open or short circuit of outdoor temperature sensor
E6
Open or short circuit of room or evaporator temperature sensor
E7
Outdoor unit fan protection
P0
IGBT over-strong current protection
P1
Over voltage or too low voltage protection
P2
Temperature protection of compressor top.
P4
Inverter compressor drive error
Note: E4 & P3: Reserved function
9.2 Diagnosis and Solution
9.2.1 E0(EEPROM parameter error) error diagnosis and solution
Circuit or software error on indoor PCB
Replace indoor PCB