What are the reasons for lower temperature?How to deal with it?

What are the reasons for lower temperature?How to deal with it?

There are eight reasons.Firstly, the mounting angle deviation is too large;secondly,there are obstruction near the collector plate;thirdly,there are much dust on the vacuums’ surface;fourthly,poor water quality leads to the accumulation of sludge within the vacuum tube;fifthly,you obeyed to the requirements to install a necessary check valve,resulting in the loss of hot water;sixth,the bad weather and lack of radiation energy;seventh,pipeline insulation processor is not in place or the insulation effect is reduced;eighth,hot water system is failing.And there are eight methods to deal.Firstly,correct the angle of installation;secondly,change the environment of installation;thirdly,clean the vacuums’ surface;;fourthly,clean the vacuum;fifthly,install the check valve;sixth,use the photoelectric complementary to aid heating;seventh,strengthening the measures of insulation;eighth,repair or replace the controller.