Device evaluation: one device was received.Per visual inspection, no physical damage was found on the device.Per functional testing, although no incidents were confirmed where the unit repeatedly turned on and off after the power was turned on, it was confirmed that the heating tube was not recognized due to a defective microswitch.Because the complaint of the device repeatedly turning on and off was not confirmed, a root cause could not be determined.It is presumed that the phenomenon of repeating on/off was the repeated unrecognition of the tube connection.The product's history records were reviewed and there were no non-conformances nor service-related issues that would have resulted in the reported complaint.The microswitch was replaced.The device passed all functional and delivery tests.
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