The working principle of shrink packaging machine heating, the heater circuit used on the machine is the main power supply through a magnetic absorption switch and then to the electric heating tube, so when the temperature cannot rise or the temperature rises slowly, you should first check the magnetic absorption switches. Whether the connection point is normal.
On the one hand, this problem may be that the line does not pass through one of the phases, and the above phenomenon will occur. If the magnetic switch is normal, check the meter again to see if the ohmic value of each phase is the same as that of the machine.
On the other hand, it may be a short circuit. If all phases are connected but the circuit or electric heating tube is still abnormal, the heater needs to be replaced.
