During device evaluation at olympus, it was found the complaint was unable to be confirmed or reproduced.Upon disassembly and inspection, there was no immersion or obvious dust inside the device and the heath dissipation and ventilation holes were normal.No signs of burning was found.The fuse of the device was normal.When started, the device continually supplied air for four hours and all functions were normal.After the gas supply was stopped, the cover was opened for inspection and the power unit was found to be hot, which may have been due to aging of the power unit and poor load leading to overheating.This event is under investigation.A supplemental report will be submitted upon receiving additional information.
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