空调抽真空压力表指针不动？
空调维修怎样接压力表
选择需要使用的制冷剂压力表和对应的制冷剂软管，将不带套管的软管一端连接到压力表上，带套管的一端先连接到针阀上。当顶针略微打开阀芯，有少量制冷剂流出时，迅速拧紧，完成压力表连接。制冷剂压力表范围应根据针阀处制冷剂压力值确定。拧紧针阀和软管连接位置时，应加快速度，防止制冷剂损失过多。
空调加氟时压力表15个往上也不制冷。一开始是4.5左右，后来5,5.5,6.5,然后就一下不停的到Typical compressor overtemperature protection itself: the cause of the cause and solution:1 outdoor condenser (that is, outside the machine that lu fin) too dirty on solving two inside after cleaning the voltage is too low (less than 170v)，etc. In the morning or evening someone's house is not low voltage electricity try if after the installation of a voltage regulator to solve 3 repaired?It is possible that there is air fluoride added more or system put off excess fluoride or to take time to add fluoride solution to this problem if you don't have system can not consider 4 system hasbet (dirty wager wager冰bet) look for professional maintenance man wash the system with nitrogen gas and then to take time to add fluoride after solving the problem of starting capacitance of a 5 orcompressor itself problems seek专业人士6 PC board inductance part has a problemProfessional maintenance man to solve 7 natural environment temperature more than 38 degrees mayalso cause the compressor flow most easily night at noon good natural environment such as temperature drop point naturally good advicefirst take a look at the fin outdoor肮脏don't肮脏to see if the voltage too low energy will solve the problem and solve fault said ah this tired lookout can help you格力空调加完氟，低压管上接的压力表显示7，问了修空调的师傅说一般都是4.5左右，放气压力也不降
根据所描述的现象来判断，维修人员的水平比较低，制冷系统的状态是否正常也不清楚。要查看制冷系统的制冷剂压力值，在空调运行在制冷模式时读取压力值是有意义的。采用R22制冷剂的空调系统处于制冷模式运行。当室外环境温度为35℃左右，室内实际温度为27℃左右时，低压截止阀针阀部分制冷剂压力值为5bar左右，正常。使用R410a制冷剂的空调系统处于制冷模式运行。在相同工况下，针阀制冷剂压力值约为8.8bar，属于正常状态。关闭状态下测量的制冷剂压力无意义。
空调抽真空压力表指针不动？或表阀未打开，在假真空中;或真空已合格。制冷剂复合真空压力表用于制冷系统,只有在真空指针开始猛烈地摇摆,回来后,指针几乎不动,因为这个时候系统中的压力管道一直低于零,准确地说已经超过了这个表的测量范围。当然，安装工人做假的，直接不打开旁边桌子的阀门，就会有这个问题。
