vc999 RS420, Maintenance Manual

Page: 49 / 157

TROUBLESHOOTING GUIDE
CHECK SEAL DIE TOP VACUUM
1. Advance forming film to separate the seal die into two separate chambers, top and
bottom, with a flat web.
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Make sure there is no damage to the film (i.e. Holes, tears, or the film out of the
grippers).
2. Connect a vacuum gauge to the t-fitting for the seal die top.
3. All alarms must be eliminated on the alarm screen prior to this test to enable proper
manual valve operation.
4. In the manual valve operation screen turn V3 (seal die close) on by highlighting the
on/off value and pressing “enter” to close the seal die.
5. In the manual valve operation screen turn V7 and V8 (die top and die bottom vacuum
valves) on by highlighting the on/off value and push “enter” to turn these valves “on”.
Both valves must be activated to keep the film barrier stabilized.
6. Run pump for 30 seconds for maximum vacuum level.
7. Check vacuum level deviation for 1 minute.
8. Make a note of the maximum level reached and the remaining vacuum level after 1
minute.
9. A deviation of 10 torr / 13 mB in one minute is acceptable.
10. Turn V7 and V8 off by highlighting the on/off value and push “enter” to turn these
valves “off”.
11. Turn V12(seal die vent) on by highlighting the on/off value and push “enter” to turn
this valve “on” after hearing the die vent return the value to “off”.
12. In the manual valve operation screen turn V3 (seal die close) off by highlighting the
on/off value and pressing “enter” to open the seal die.
CHECK SEAL DIE BOTTOM VACUUM
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Repeat the steps listed above for the seal die top vacuum with the exception of
number 2. The gauge must be connected to the die bottom t-fitting.
POSSIBLE CAUSES FOR VACUUM LEAKS
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Inspect the condition of the epoxy on the vacuum system plumbing.
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If new epoxy is required VC999 Packaging Systems recommends “3M DP-100
epoxy”.
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Clean all surfaces with a wire brush and acetone prior to applying new epoxy.
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Check for physical damage on the die top and die bottom.
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Check the seal gasket for damage.
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Replace it if it is damaged.
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Check the rod t-seals around the seal cylinder shafts.
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Check these by pressing your finger over the vent port of the seal cylinders
during the vacuum cycle of the machine.
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Replacements are needed if a strong vacuum is felt against your finger.
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Proper lubrication of these seals with o-ring lubricant or petroleum jelly is
necessary during installation.