What is the reason why the temperature of the tungku vakum does not rise?

You need to first check whether the heating relay in the control box is closed. If not, check whether there is a problem with the circuit or the relay. If it is sucked in, there may be a problem with the thermometer on the drying tower, and the temperature display is abnormal. It is necessary to understand the normal degree. It will automatically jump after the alarm of the temperature controller or something. It may be the problem of the heating element, whether it is graphite, molybdenum, or nickel-chromium, and then measure the resistance value. It is the voltage regulator, the secondary voltage.