11
Troubleshooting
VACUUM PUMP AND VACUUM SYSTEM
Vacuum pump does not start, the possible reasons are as follows:
• Limit switch is not pressed on:
- Close the machine cover and adjust the limit switch.
- Adjust the pull-rod for electric cover opening machine.
•
Time relay of vacuum pump is damaged:
- Replace it.
•
Dynamo of vacuum pump is damaged:
- Replace it.
Vacuum chamber cannot reach the vacuum degree, the possible reasons are as follows:
•
Vacuum degree cannot be reached because vacuum pump is worn or damaged.
• Loose air pipe joint, broken pipe, damaged sealing ring of vacuum chamber or damaged solenoid valve
causes the entry of air into vacuum chamber.
• Insufficient oil in vacuum pump.
•
Vacuum timing is not enough.
Vacuum chamber cannot be opened, the possible reasons are as follows:
•
Air-bleed solenoid valve is not turned on.
•
For electric cover opening machine, the cover opening motor may be damaged, or pull rod is jammed.
Air remains in bag after processing is finished, the possible reasons are as follows:
•
Wrong position resting on sealing bar.
- Redo it.
•
Uneven sealing pressure bar presses the bag opening side so that air cannot escape.
Abnormal sound or tripping when running, black smoke or oil drop at air vent:
•
Abnormal sound of fan of pump motor, it should be repaired.
•
Blockage may be seen in air intake and/or pipe.
• Insufficient oil of vacuum pump or the use of non-standard lubricant.
• Long-time running of pump or overheat running under high temperature, please keep the machine
ventilated and heat radiated.
•
Faulty vacuum pump motor or solenoid valve of vacuum pump or wear and tear due to usage.
•
Replace parts or contact the manufacture factory.
HEAT SEALER
Incapable sealing, the possible reasons are as follows:
•
The heating sealing selector switch is not selected and the heating power is not turned on.
• The heating element is damaged and the power connecting position of heating element is cut off.
•
The heating time is set at “0”.
•
The heating time relay is damaged.
• The sealing solenoid valve does not act and gas bag does not bulge (or gas bag is damaged).
