冷水机组在大型建筑物空调系统中得到了广泛应用,其故障诊断也受到了广泛关注。本文提出使用压缩机功耗、冷凝器负荷、虚拟蒸发器负荷以及虚拟冷凝器负荷替代蒸发器负荷,组成冷水机组故障诊断新模型,以满足不同参数条件下的故障诊断要求。通过ASHRAE 1043-RP数据的验证,新模型具有很好的预测精度,能够作为冷水机组的故障诊断模型。 Chiller has been widely used in large building air-conditioning systems, and its fault diagnosis has received widespread attention. This paper proposes to use the compressor power consumption, condenser load, virtual evaporator load and virtual condenser load instead of evaporator load to form a new fault diagnosis model for chillers to meet the fault diagnosis requirements under different parameters. Through the verification of ASHRAE 1043-RP data, the new model has good prediction accuracy and can be used as a fault diagnosis model for chillers.