Omcan VP-IT-0300 Instruction Manual page 12

Maintenance and Troubleshooting
of between +10° and + 30°.
• The bags are composed of an outer layer in nylon to protect against air intake; the nylon tends to absorb
humidity especially in the presence of temperature changes; the humidity absorbed prevents correct
sealing: to solve the problem, the bags must be kept in a dry place at temperature between +10° and + 30°.
• The humidity absorbed by the outer layer of the bag can be eliminated by sealing the bag twice.
• Check you have left sufficient free space between the product to pack and the opening of the bag; a limited
space creates folds and bends to prevent correct sealing and limits the vacuum level reachable.
• Check you have cleaned the opening of the bag near the sealing point; any impurities deriving from
passage of the product to package, prevents correct sealing.
• Check you have removed all possible roughness that could perforate the bag; the machines create a high
vacuum level with resulting adhesion of the bag to the product, any point or roughness can create micro-
pores in the bag to let air in.
• Humid products can cause liquid to rise towards the opening of the bag, damaging sealing; check you have
dried the products to package or use a double bag; insert the product in a first bag, fold the mould of the
bag a few times and place it in a second bag with the opening folded of the first turned towards the bottom
of the second. You can execute the vacuum function and any residual liquids will stay in the first bag
without passing into the second, as such obtaining efficient sealing.
• When you use rolls, the first sealing must be carried out by positioning the mouth on the roll on the sealing
bar and not in the vacuum chamber; the machine seals correctly only if the cover exerts correct pressure
on the sealing bar. Anticipating sealing before having a sufficient vacuum level can create channels with air
passage and make sealing inefficient. You are advised to carry out a complete automatic vacuum/sealing
cycle.
• Sealing only function: position the opening of the bag on the sealing bar and not in the vacuum chamber;
the machine seals correctly only if the cover exerts correct pressure on the sealing bar. Anticipating sealing
before having a sufficient vacuum level can create channels with air passage and make sealing inefficient.
You are advised to carry out a complete automatic vacuum/sealing cycle.
• If air enters the bag during the sealing phase and after a correct vacuum/sealing cycle, you need to replace
the bag which is probably damaged.
THE MACHINE DOES NOT CREATE A VACUUM IN THE BAG
• Check you have correctly positioned the opening of the bag between the seals of the vacuum chamber.
• Proceed with auto-diagnosis tests to ensure the machine is working correctly.
• The machine works correctly with original, embossed type bags. Different bags may not work adequately;
check you have used the correct bags.
• During the summer period (when temperatures are higher) or in the event of prolonged use, the residual
heat on the sealing bar can create pre-sealing of the bag to prevent the machine from correctly sucking:
decrease the sealing power using the electronic programming to decrease the sealing time, wait a few
minutes for the sealing bar to cool and continue to work with a lower sealing power.
• Check the seals on the vacuum chamber; in the event of slight liquid suction the seals can harden and get
damaged; in this case you need to change the seals.
THE MACHINE DOES NOT AUTOMATICALLY SEAL
• Proceed with auto-diagnosis tests to ensure the machine is working correctly.
• Start a vacuum cycle and manually seal to check the sealing bar is working properly.
• Check the electronic settings as described in the paragraph "Reset the factory parameters" or adjust the
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