1. The vacuum pump travel switch of the packaging machine is not pressed. The cover can be closed, and the travel switch can be adjusted by adjusting the screw position or the pressure lever. The pull rod should be adjusted for the electric cover opening model.
2. If it is a relay control panel, the time relay of the vacuum pump may be damaged. If it is controlled by the computer version, it may be that the computer is faulty and can be replaced.
3. There was a problem with the reset of the residual air sealing strip in the vacuum packaging product bag, which caused the bag mouth to be compressed when the vacuum packaging machine pumped air. This situation causes the bag to be sealed in advance and the air in the bag cannot be pumped out. It can be replaced.
4. The sealing strip of the packaging machine is not flexible, and the bag mouth is pressed tightly, so that the air cannot be extracted. This is caused by insufficient vacuum pump oil or non-standard oil. Try after adding vacuum pump oil.
5. Overheating caused by long-term operation of vacuum pump, or operation under high temperature. It can keep the machine ventilated and cool. The vacuum packaging machine can automatically extract the air in the packaging bag, and complete the sealing process after reaching the predetermined vacuum degree. Or, fill nitrogen or other mixed gases, and then complete the sealing process.