Indoor Unit Error Display; Diagnosis And Solution - Carrier 42LUVH025N Service Manual

9.1 Indoor Unit Error Display

Display
E0
E1
E2
E3
E5
E6
E7
P0
P1
P2
P4
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
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LED STATUS
EEPROM parameter error
Indoor / outdoor units communication protection
Zero-crossing signal error
Fan speed out of control
Open or short circuit of outdoor temperature sensor
Open or short circuit of room or evaporator temperature sensor
Outdoor unit fan protection
IGBT over-strong current protection
Over voltage or too low voltage protection
Temperature protection of compressor top.
Inverter compressor drive error
Replace indoor PCB