Klarstein Airakles, Manual

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c. If need to open the lid / cover, please pull out the vent valve, let air runs in first, then
open lid / cover, as below Pic.8
Notice: if the tank does not stick to the lid / cover automatically, or the control panel
shows “E0” in set working period, it means the product vacuum pumping set is leaking
air, and leakproofness is not good. Please stop working, and check if all the vacuum
pumping set parts are installed well and sealed, then repeat above step a. and step b.