Modular air cooled water heat pump unit alarm 65 indicates overcurrent protection trip. When the condenser heat dissipation is poor, resulting in high condensing pressure, pressure switch action protection; Excessive refrigerant charge, resulting in high pressure, pressure switch action protection; Refrigerant leakage, system refrigerant shortage, resulting in low compressor suction pressure, pressure switch action protection; Compressor exhaust valve plate is broken, resulting in poor exhaust, causing high pressure pressure, pressure switch action protection; Compressor suction and exhaust valve plate is not tightly closed, resulting in compressor leakage, resulting in low suction and exhaust pressure, pressure switch action protection.
The alarm 65 of the modular air-cooled chiller heat pump unit refers to the start of the overload protection function of the unit, which may be caused by the power supply voltage being too high or too low, the overload of the unit running for a long time or the ambient temperature being too high. It may also be caused by internal line failure of the unit, fan or compressor and other parts damage. If this alarm occurs, the unit should immediately stop operation, check and troubleshoot, including checking the power supply voltage, ambient temperature, internal lines and components of the unit. After troubleshooting, the unit should be restarted and the operation should be observed. If the alarm occurs again, professionals should be contacted for maintenance.