代碼 P1: Discharge pipe high pressure protection

Manual restart required: No Display: Displayed on the unit with the error Description: Discharge pipe high pressure protection. If the system has a 3-phase protector and the 3-phase protector is connected with the high pressure switch, the system will display P1 protection when initially powered on, and P1 protection will disappear once the system reaches a steady state. All units stop running. Error code is only displayed on the unit with the error. Trigger condition: Discharge pressure ≥ 4.4MPa. Recover condition: Discharge pressure ≤ 3.2MPa. Reset method: Resume automatically. Possible causes: - Outdoor unit stop valves are closed. - Pressure sensor/switch not connected properly or has malfunctioned. - Excess refrigerant. - System contains air or nitrogen. - High pressure side blockage. - Poor condenser heat exchange. - Main PCB damaged.