Phase sequence error
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Communication error between indoor and master unit
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T3/T4 temperature sensor error
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Abnormal power supply voltage
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Reserved
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Discharge temperature sensor error
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Outdoor unit address error
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EEPROM mismatch of compressor
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DC bus voltage error
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T6B temperature sensor error
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T6A temperature sensor error
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Electronic expansion valve connection error
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Communication error between main board and compressor drive board
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Quantity of outdoor unit decreases error
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Quantity of outdoor unit decreases error
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Inverter-module protection
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3 times of P2 protection in 60 minutes
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3 times of P2 protection in 60 minutes
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Quantity of indoor units mismatching
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High pressure sensor error
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10 times of P9 protection in 120 minutes
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Slave unit malfunction (y=1,2; e.g. 1Hd stands for slave unit 1 error)
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3 times of PL protection in 100 minutes
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High pressure protection or discharge temperature switch protection
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Low pressure protection
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Compressor current protection
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Discharge temperature protection
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High temperature protection of condenser
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Fan module protection
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Inverter module temperature protection
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Compressor discharge insufficient superheat protection
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Inverter compressor module error
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DC bus low voltage protection
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DC bus high voltage protection
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MCE error
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Zero speed protection
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Phase sequence protection
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Compressor frequency variation greater than 15 Hz within one second protection
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Actual compressor frequency differs from target frequency by more than 15 Hz protection
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