这份文件已被撤回。本标准建立了实验室和现场诊断试验方法，用于确定空调机组、热泵和冷却器中冷凝器冷却用直接驱动螺旋桨风机振动问题的原因。本标准适用于所有类型和尺寸的空调机组、热泵和直接驱动250 mm至750 mm（10 in.至30 in.）的冷水机组直径螺旋桨风机，在本标准中称为“系统”本标准涵盖由旋转部件的不平衡、作用在风机叶片上的空气动力和电机中的电磁力引起的系统振动问题。本标准不包括由机组中的压缩机或外部源（如支撑系统的结构）激发的系统振动问题。

This document has been withdrawn.This standard establishes laboratory and on-site diagnostic test methods for identifying causes of vibration problems involving direct-driven propeller fans for condenser cooling in air-conditioning units, heat pumps, and chillers.This standard applies to all types and sizes of air-conditioning units, heat pumps, and chillers using direct-driven 250 mm to 750 mm (10 in. to 30 in.) diameter propeller fans, which, for the purposes of this standard, are called a "system." This standard covers system vibration problems excited by unbalance of the rotating parts, aerodynamic forces acting on the fan blades, and electromagnetic forces in the motor. This standard does not cover system vibration problems excited by the compressor in the unit or by external sources such as the structure supporting the system.