No lot number was provided; therefore, device history record review could not be performed.A product sample was received for evaluation.Visual and functional testing were performed.Visual inspection found a part of the female connector of the flat filter (the base of the lug) was whitened.During functional testing water was injected by connecting a syringe, but no leakage was found at the connection, so it is considered that the connector was not deformed or damaged.Since only the root of the lug is whitened, it is considered that it is not a reaction by a chemical solution but an excessive force.The root cause of the reported issue was found to be user interface.We will record the occurrence of this event in a database, monitor the occurrence tendency of this event, and take appropriate measures according to the occurrence situation.No product information has been provided to date.(b)(4).
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