Pillow type packaging machine. The temperature is not displayed or cannot be controlled. How to use a universal meter to detect whether it is a temperature control meter or a solid state. Or is one of the three heating tubes broken? Please ask the great God
measure the voltage at both ends of the heating tube when the temperature controller light is not on. If the voltage is 220, it indicates that the solid-state relay or temperature control meter is damaged. At this time, measure the input end of the solid-state relay. If there is an input, the temperature control meter is broken, and if there is no input, the solid-state relay is broken
if there is voltage at both ends of the heating tube and it is not heated, the heating tube is broken.