(1) Air compressor failure: check valve damage, piston ring wear serious, intake valve plate damage and air filter blockage.

若要判断止逆阀是否损坏，只需在空压机自动停机十几秒后，将电源关掉，用手盘动大胶带轮，如果能较轻松地转动一周，则表明止逆阀未损坏；反之，止逆阀已损坏；另外，也可从自动压力开关下面的排气口的排气情况来进行判断，一般在空压机自动停机后应在十几秒左右后就停止排气，如果一直在排气直空压机再次启动时才停止，则说明止逆阀已损坏，须更换。

If you want to judge whether the check valve is damaged, just turn off the power supply after the air compressor stops automatically for more than ten seconds, and turn the large belt pulley manually. If it can be easily rotated for one cycle, it indicates that the check valve is not damaged; on the contrary, the check valve has been damaged; in addition, it can also be judged from the exhaust condition of the exhaust port under the automatic pressure switch. Generally, after the automatic shutdown of the air compressor, the check valve is not damaged After more than ten seconds, stop exhaust. If the exhaust is stopped until the air compressor starts again, it indicates that the check valve has been damaged and must be replaced.

当空压机的压力上升缓慢并伴有串油现象时，表明空压机的活塞环已严重磨损，应及时更换。

When the pressure of the air compressor rises slowly and accompanied by oil leakage, it shows that the piston ring of the air compressor has been seriously worn and should be replaced in time.

当进气阀片损坏或空气过滤器堵塞时，也会使空压机的压力上升缓慢（但没有串油现象）。检查时，可将手掌放空气过滤器的进气口上，如果有热气向外顶，则说明进气阀处已损坏，须更换；如果吸力较小，一般是空气过滤器较脏所致，应清洗或更换过滤器。

When the intake valve piece is damaged or the air filter is blocked, the pressure of the air compressor will rise slowly (but there is no oil leakage). During the inspection, the palm of your hand can be placed on the air inlet of the air filter. If there is hot air pushing outward, it means that the air inlet valve has been damaged and must be replaced; if the suction is small, it is generally caused by the dirty air filter, the filter should be cleaned or replaced.

（2）减压阀的故障有：压力调不高，或压力上升缓慢等。

(2) The faults of the pressure reducing valve are: the pressure can not be adjusted high, or the pressure rises slowly.

压力调不高，往往是因调压弹簧断裂或膜片破裂而造成的，必须换新；压力上升缓慢，一般是因过滤网被堵塞引起的，应拆下清洗。

If the pressure is not adjusted high, it is often caused by the rupture of the pressure regulating spring or the rupture of the diaphragm, so it must be replaced; the pressure rises slowly, which is generally caused by the blockage of the filter screen, so it should be removed and cleaned.

（3）管路故障有：管路接头处泄漏，软管破裂，冷凝水聚集等。

(3) Pipeline failures include: leakage at the pipe joint, hose rupture, condensation water accumulation, etc.

管路接头泄漏和软管破裂时可从声音上来判断漏气的部位，应及时修补或更换；若管路中聚积有冷凝水时，应及时排掉，特点是在北方的冬季冷凝水易结冰而堵塞气路。

In case of pipe joint leakage and hose rupture, the leakage position can be judged by sound, and it should be repaired or replaced in time; if there is condensate accumulated in the pipeline, it should be drained in time. The characteristic is that the condensate water is easy to freeze and block the gas path in winter in North China.

（4）压缩空气处理组件（三联体）的故障有：油水分离器故障，调压阀和油雾器故障。

(4) The faults of compressed air treatment unit (TRIAD) are: oil water separator failure, pressure regulating valve and oil mist device failure.

油水分离器的故障中又分为，滤芯堵塞、破损，排污阀的运动部件动件不灵活等情况。工作中要经常清洗滤芯，除去排污器内的油污和杂质。

The faults of oil-water separator are divided into plugging and breakage of filter element and inflexibility of moving parts of drain valve. The filter element should be cleaned frequently to remove the oil and impurities in the blowdown.

调压阀的故障与上述“（2）减压阀的故障”相同。

The fault of pressure regulating valve is the same as "(2) failure of pressure reducing valve" above.

油雾器的故障现象有：不滴油、油杯底部沉积有水分、油杯口的密封圈损坏等。当油雾器不滴油时，应检查进气口的气流量是否低于起雾流量，是否漏气，油量调节针阀是否堵塞等；如果油杯底部沉积了水分，应及时排除；当密封圈损坏时，应及时更换。

The fault phenomena of the oil atomizer are: no oil dripping, water deposited at the bottom of the oil cup, and the sealing ring of the oil cup mouth is damaged. When the oil mist eliminator does not drip oil, check whether the air flow rate at the air inlet is lower than the fogging flow rate, whether there is air leakage, whether the oil volume regulating needle valve is blocked, etc.; if the water is deposited at the bottom of the oil cup, it should be removed in time; when the sealing ring is damaged, it should be replaced in time.