4.3 Faulty seal:
4.3.1 Insufficient seal:
Damaged teflon or silicone rubber.
Sealing pressure too low, bellows leaking or pressure bar jammed.
Leakers in seal: heating wire mechanically damaged (knicked) or silicone rubber
uneven.
4.3.2 No seal:
Sealing wire burnt.
Faulty contact in sealing circuit.
Sealing transformer burnt through.
Contactor does not work.
4.3.3 Permanent sealing current:
Contactor is jammed check sealing transformer for damage through overload.
4.3.4 Seal does not stick:
Insufficient layer of polyethylene (inferior quality of bags).
Seal area extremely contaminated by fat or meat juice. Use filling aid.
Sealing temperature is too low (when using very thick films).
Caution: Do not increase sealing time more than really necessary; higher temperature
will reduce working life of teflon and silicone rubber.
4.4 Fault in the valve:
Vacuum or air valve does not open.
Check whether there is voltage on the magnetic valves during their period of operation. If
there is no voltage a wire is broken or the PC board is damaged.
Lid does not open at the end of the cycle; air enters, but there is still 20 - 40% vacuum in
chamber. Vacuum valve does not close.
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