壁挂炉系统出现频繁掉压或者没有压力的情况。

　　Cb system appeared frequently fall without pressure or stress.

　　原因:壁挂炉在长期运行后，采暖系统出现一定幅度的压力下降是正常现象。造成此故障的主要有两种情况:一是因为采暖系统的管道密闭不严，系统跑冒滴漏造成缺水而掉压;另一种是膨胀水箱缺气或者膨胀水箱偏小。

　　Cb: after running for a long time, heating system in a certain range of pressure drop is a normal phenomenon. This failure mainly has two kinds of circumstances: because heating system pipe closed lax, system PaoMaoDiLou cause a lack of pressure; The other is a small expansion tank of gas or expansion tank.

　　解决办法:如果是前一种情况造成的问题，则系统的压力会持续降低。此时需要找系统的安装方对采暖系统进行打压检查，查到漏点后进行维修，给系统补水后解决问题。

　　Solution: if it is caused by the former, then the system will continue to reduce the pressure. Now need to find a system of heating system crackdown on the installation party to check, check the funnelled after repair, to the system after filling water to solve the problem.

　　如果是后一种情况造成的，业主可以观察到这样的情况:当壁挂炉不工作时系统压力较低，一旦采暖功能开始运转，则压力会有较大的提升，上升幅度还比较大，压力超过极限值后，安全阀开始泄水。解决的办法是需要给膨胀水箱重新充压或者增设系统膨胀水箱。

　　After if it is a kind of situation, the owner can observe such a situation: when cb does not work when the system pressure is low, to run once the heating function, the pressure will have larger ascension, increase is relatively large, after pressure exceeds limit value, the relief valve began to drain. The solution is to need to expansion tank pressurized expansion tank or addition system.