Inlet and outlet water temp.sensor fault
Wire controller communication protection
Driver communication protection
IPM over temp. protection
High exhaust temp. protection
Low outlet water temp. protection（Cooling）
High coil temp.protection（Cooling）
High outlet water temp. protection（Heating）
High pressure switch protection
Low pressure switch protection
Power supply phase sequence error
Power supply phase A lost fault
Inlet and outlet temp. difference too high protection
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