It was reported that the ventilator failed flow transducer test during pre-use check.The ventilator logs were not provided.Our field service engineer investigated the ventilator on site and solved the issue by replacing the air gas module.The replaced part was returned for further investigation.The returned air gas module came without a nozzle unit.Simulated use testing of the air gas module passed the performed pre-use check and could not reproduce the reported failure.No abnormal found during ventilation for four days.After the ventilation, the air gas module passed another pre-use check.The reported issue could not be reproduced.Therefore, the root cause to the reported issue could not be established by this investigation.
|