V4 outdoor unit fault codes:
- E0 – Communication error between outdoor units Displayed only on the auxiliary unit. Read More
- E1 – Phase sequence error Displayed on all outdoor units. Read More
- E2 – Communication failure between master outdoor unit and indoor units Displayed on all outdoor units.
- E4 – Outdoor unit temperature sensor failure Displayed on all outdoor units.
- E8 – Outdoor unit addressing error Displayed on all outdoor units.
- E9 – Supply voltage failure Displayed on all outdoor units.
- H0 – Communication failure between DSP and 780.034 Displayed on all outdoor units.
- H1 – Communication failure between 9177 and 780.034 Displayed on all outdoor units.
- H2 – Decrease in number of outdoor units Only displayed on the main unit.
- H3 – Increasing the number of outdoor units Only displayed on the main unit.
- P0 – Inverter compressor protection Displayed on all outdoor units.
- P1 – High pressure protection Displayed on all outdoor units.
- P2 – Low pressure protection Displayed on all outdoor units.
- P3 – Compressor overcurrent protection Displayed on all outdoor units.
- P4 – Compressor discharge pipe overtemperature protection Displayed on all outdoor units.
- P5 – Outdoor unit condenser high temperature protection Displayed on all outdoor units.
- P6 – Inverter module protection Displayed on all outdoor units.
- P7 – Constant compressor No. 1 overcurrent protection Displayed on all outdoor units.
- P8 – The constant compressor 2 overcurrent protection is displayed on 14 / 16HP outdoor units.
V4 Outdoor Unit Central Control System Fault Codes:
- H3 – Auxiliary outdoor unit increase error (Only displayed on the master unit)
- H2 – Auxiliary outdoor unit decrease error (Only displayed on the master unit)
- H1 – Communication failure
- Ef – Other malfunction
- E4t4 – Ambient or pipe temperature sensor malfunction
- E3 – Ambient or pipe temperature sensor malfunction
- E2 – Sensor Malfunction
- E1 – Fault or missing phase during phase Read More
- E0 – Communication Failure Read More
- Pf – Other Protections
- Pe – Oil Balancing
- Pd – Oil return
- Pa – Defrost Protection
- P8 – 3. Compressor Current Protection
- P7 – 2. Compressor Current Protection
- P5 – Condenser high temperature protection
- P4 – Compressor outlet temperature protection
- P3 – Inverter compressor current protectionı
- P2 – Low pressure protection
- P1 – High pressure protection
- P0 – Inverter compressor protection
V4 Plus Outdoor Unit Fault Codes ：
- E0 – Communication failure between outdoor units Read More
- E1 – Phase sequence error Read More
- E2 – Communication failure between outdoor unit and indoor units
- E4 – Ambient or pipe temperature sensor malfunction
- E8 – Outdoor unit address setting error
- E9 – Voltage error
- H0 – Communication Failure between IR341 and 780034
- H1 – Communication Failure between 0537 and 780034
- H2 – Auxiliary outdoor unit decrease error
- H3 – Auxiliary outdoor unit increase error
- H4 – If P6 is displayed 3 times within half an hour, H4 is displayed.
- H5 – If P2 is displayed 3 times in half an hour, H5 is displayed.
- H6 – If P4 occurs 3 times in 100 minutes, refer to P4.
- H9 – If P9 occurs 3 times in 30 minutes, see P9.
- H7 – The number of indoor units does not match.
- P0 – Inverter compressor temperature protection
- P1 – High pressure protection
- P2 – Low pressure protection
- P3 – Inverter compressor current protection
- P4 – Compressor outlet temperature protection
- P5 – Condenser high temperature protection
- P6 – Inverter module protection
- P7 – 1. Constant compressor current protection
- P8 – 2. Constant compressor current protection
- P9 – Fan module protection
- L0 – Inverter module protection
- L1 – DC power supply low voltage
- L2 – DC power supply high voltage
- L4 – MCE error
- L5 – Zero speed protection
- L7 – Phase sequence error
- L8 – The frequency is 15 Hz at one time. surplus
- L9 – Protection: If the speed change set by instantaneous speed is 15Hz
