加氟前提条件：
Pre conditions for fluorination:
1.维修的空调必须符合其使用条件及安装标准。
1. The air conditioner to be maintained must meet its service conditions and installation standards.
2..维修工具及材料必须合格。
2. Maintenance tools and materials must be qualified.
3 .严格按加氟工艺操作
3. Strictly follow the fluorination process