Investigation codes: updated investigation summary: the affected device was returned for evaluation.Cracks were observed on the cover of the circulating water tank.After visual inspection, functional testing was performed.When the power switch was turned on, the circulating water level alarm and heating tube installation alarm sounded, but it was confirmed that the lcd did not display anything.The customer's indicated failure was confirmed.The root cause was traced to the failure of the lcd circuit section of the main pcb.At the customer's request, the product was returned to the customer without repair.The service history review identified there was no indication that the complaint was related to a service of the device within the review period.
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