1. Classification of maintenance and maintenance of central air conditioning

1、检查性维护保养：

1, inspection maintenance:

（1）基于设备运行情况和客户需求，有计划地进行各类常规检查；

(1) based on the operating conditions of the equipment and the needs of the customers, all kinds of routine inspection are carried out in a planned way.

（2）现场指导业主的操作人员，讲解涉及机组运行、保养的实用技术；

(2) to guide the owner's operators on the spot, to explain the practical techniques involved in the operation and maintenance of the units.

（3）提供各类必要的增值服务；

(3) providing all kinds of necessary value-added services;

（4）就主机及辅助设备运行存在的问题提供专业意见和改善方案。

(4) provide professional advice and improvement on the problems existing in the operation of the host and auxiliary equipment.

2、预防性维护保养：

2, preventive maintenance:

（1）包括检查性维护保养提供的内容；

(1) including the contents of the inspection maintenance.

（2）按照厂家的推荐进行必要的预防性保养；

(2) carry out the necessary preventive maintenance according to the recommendation of the manufacturer;

（3）预防性保养包括清洗换热器铜管，分析和更换冷冻机油、油滤芯、干燥过滤器等。

(3) preventive maintenance includes cleaning heat exchanger copper tube, analysis and replacement of frozen oil, oil filter core, drying filter and so on.

3、全面性维护保养：

3, comprehensive maintenance:

（1）最全面彻底的保养方案，包括全部常规检查、增值服务和紧急故障处理的服务；

(1) the most comprehensive and thorough maintenance program, including all the routine inspection, value-added service and emergency service;

（2）在设备故障时，负责全部维修工作和零部件更换。

(2) in the case of equipment failure, it is responsible for all maintenance work and replacement of parts.

4、紧急性维修：

4, emergency maintenance:

根据客户的需求，24小时为客户提供紧急维修服务，发达的服务网络和高素质的服务人员队伍确保快速排除故障，确保最短停机时间。

According to customer needs, 24 hours to provide customers with emergency maintenance services, well-developed service network and high-quality service staff to ensure that the rapid elimination of failures, to ensure the shortest downtime.

5、节能改造：

5. Energy saving transformation:

节能改造是指将冷却水水泵、冷却风扇电机采用变频驱动，并根据冷冻水的出水温度变化来实现水泵和风机的变频调速，实现节能降耗。

Energy saving transformation means that the cooling water pump and the cooling fan motor are driven by frequency conversion, and the variable frequency speed regulation of the pump and fan is realized based on the change of the outlet water temperature of the chilled water, so as to achieve energy saving and consumption reduction.

6、冷冻机油的分析：

6. Analysis of refrigerant oil:

润滑油质能充分反映压缩机的内部机械运转状况和运行趋势，润滑油的金属含量、湿度和酸度等都是可能导致重大设备故障的关键指标，我们提供的专业油分析，能在管件时刻向您提出改进意见，提前排除机组的重大故障隐患，避免意外停机和高额维修费用，保护您的投资。

Lubricating oil quality can fully reflect the internal mechanical operation status and operation trend of compressor lubricating oil, metal content, humidity and acidity are key indicators may lead to major equipment failure analysis, we provide professional oil, can propose improvements to you in advance fitting moment, eliminate serious hidden trouble of the unit, to avoid accidental shutdown and high maintenance costs, protect your investment.

7、冷却塔、水泵、风机盘管、新风机组等的维修保养和改造。

7. Maintenance and renovation of cooling tower, water pump, fan coil, fresh air unit and so on.

二、中央空调系统维护保养内容

Two. The maintenance content of the central air conditioning system

1、空调主机部分：

1, the main part of the air conditioner:

（1）检查空调主机制冷系统制冷剂的高压、低压是否正常；

(1) check whether the high pressure and low pressure of refrigerant in the refrigeration system of the air conditioner are normal.

（2）检查空调主机制冷系统制冷剂有无泄漏，是否需要补充制冷剂；

(2) check whether the refrigerant of the cooling system of the air conditioner is leaked or not, and whether the refrigerant needs to be supplemented;

（3）检查压缩机运转电流是否正常；

(3) check whether the compressor running current is normal or not;

（4）检查压缩机运转声音是否正常；

(4) check the operation of the compressor sound is normal;

（5）检查压缩机的工作电压是否正常；

(5) check whether the working voltage of the compressor is normal or not;

（6）检查压缩机油位，颜色是否正常；

(6) check the oil level of the compressor and whether the color is normal.

（7）检查压缩机油压、油温是否正常；

(7) check whether the oil pressure of the compressor and the temperature of the oil are normal.

（8）检查空调主机相序保护器是否正常、有无缺相情况；

(8) check whether the phase sequence protector of the main engine of the air conditioner is normal or not.

（9）检查空调主机各接线端子有无松动；

(9) check whether the terminals of the air conditioning main engine are loose;

（10）检查水流量保护开关工作是否正常；

(10) check whether the water flow protection switch is normal or not.

（11）检查电脑板、感温探头阻值是否正常；

(11) check whether the resistance of the computer board and temperature sensor is normal.

（12）检查空调主机空气开关是否正常；交流接触器、热保护器是否良好。

(12) check whether the air switch of the air conditioner is normal; the AC contactor and the heat protector are good.

2、风系统的检查：

2. The inspection of the wind system:

（1）检查风机盘管出风的风量是否正常；

(1) check whether the air volume of the fan coil out of the wind is normal.

（2）检查风机盘管回风的回风滤网是否聚积灰尘；

(2) check the dust of the return air filter net of the fan coil and return air.

（3）检查出风温度是否正常。

(3) check whether the wind temperature is normal.

3、水系统的检查：

3. Inspection of the water system:

（1）检查冷却、冷冻水的水质情况，是否需要更换水；

(1) check the water quality of cooling and frozen water and whether the water should be replaced.

（2）检查冷却、冷冻水系统中的过滤网上的杂质，且清洗过滤网；

(2) check the impurities in the filtration network on the cooling and frozen water system, and clean the filter net.

（3）检查水系统中有无空气，是否需要排气；

(3) check whether there is air in the water system and whether it needs exhaust.

（4）检查回水、出水温度是否正常；

(4) check whether the temperature of return water and water is normal;

（5）检查水泵声音、电流是否运转正常；

(5) check the sound and current of the pump.

（6）检查阀门是否开启灵活、有无锈斑、有无泄漏等现象；

(6) check whether the valve is open and flexible, no rust, no leakage phenomenon;

（7）检查保温系统有无开裂、破损、漏水等现象。

(7) check whether the thermal insulation system has cracks, breakage, water leakage and other phenomena.

三、中央空调系统维护保养定期回访

Three. Regular return visits of central air conditioning system maintenance

（1）向工程部工作人员了解设备、系统近期运行情况是否良好；

(1) the staff of the engineering department know whether the equipment and the system are running well in the near future.

（2）检查设备、系统的运行工作记录；判断是否有故障。

(2) check the operating records of the equipment and the system; determine whether there is a failure.

四、中央空调检修内容

Four. The contents of the central air conditioning maintenance

1、正常运转中的检修

1. Maintenance in normal operation

（1）查压缩机冷冻油的油压及油量；

(1) check the oil pressure and oil quantity of the refrigerated oil of the compressor;

（2）系统探漏（制冷剂），发现漏点及时处理；

(2) system leak detection (refrigerant), found leakage in time to deal with;

（3）检查有无不正常的声响、震动及高温；

(3) check to have normal sound, vibration and high temperature.

（4）检查冷凝器及冷却器的温度、压力；

(4) check the temperature and pressure of the condenser and cooler;

（5）检查各种阀门是否正常；

(5) check whether all kinds of valves are normal.

（6）检查冷水机出入水的温度及压力；

(6) check the temperature and pressure of the water chiller in and out of the water.

（7）检查主电路上接线端子并压实；

(7) check the wiring terminal on the main circuit and compacted;

（8）检查电气控制部分；

(8) check the electrical control part;

（9）检查机组润滑系统；

(9) check the lubricating system of the unit;

（10）检查各仪表、控制器的工作状态；

(10) check the working state of each instrument and controller.

（11）保持设备处于清洁状态。

(11) keep the equipment in a clean state.

2、年度间停机后的检修

2. Overhaul after the annual shutdown

（1）检查清洗干燥过滤器，干燥剂吸潮后应进行干燥处理或更换；

(1) check the cleaning and drying filter, the drying agent should be dried and replaced after the moisture absorption;

（2）检查及制冷设备安全保护装置整定值；

(2) the setting value of the inspection and the safety protection device of the refrigeration equipment;

（3）检查压缩机冷冻油的油压及油量，必要时进行冷冻油更换及补充；

(3) check the oil pressure and oil amount of the compressor frozen oil and replace and supplement the frozen oil when necessary.

（4）检查压缩机电机绝缘情况；

(4) check the insulation of the compressor motor;

（5）查并收紧电路上的各电线接点；

(5) check and tighten the electrical connections on the circuit.

（6）查电气控制部分；

(6) check the electrical control part;

（7）提供以上内容检查报告（每年一次）。

(7) provide the above inspection report (once a year).

3、末端的检修

3, the end of the maintenance

（1）空气处理机、风机盘管的检查（每年一次）。

(1) inspection of air processor and fan coil (once a year).

（2）空气处理机、风机盘管的保养、加油（每年一次）。

(2) maintenance and refueling of air processor and fan coil (once a year).

（3）检查、调整皮带，清洗表冷器，清洗过滤器（每年至少一次）。

(3) check and adjust the belt, clean the cooler, and clean the filter (at least once a year).

（4）清理管路、除污（每年至少一次）。

(4) cleaning up the pipe and decontamination (at least once a year).

（5）空气处理机的清扫、除尘（每

(5) the cleaning and dedusting of the air processor (each)