Derby AC Error Codes

Error Codes	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 (T4)
E6	Open or short circuit of room (T1) or evaporator temperature sensor (T2)
P0	Outdoor PCB protection
P1	Over voltage or too low voltage protection
P2	Temperature protection of compressor top.
P4	Inverter compressor drive error

Derby Ac Error Codes And Troubleshooting Method

Diagnosis and Solution

E0 (EEPROM parameter error) error diagnosis and solution

Circuit or software error on indoor PCB ⇒ Replace indoor PCB
After you trying all things then call a professional technician.

E1 (indoor / outdoor units communication protection) error diagnosis and solution

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