The manufacturer¿s international service technician confirmed the reported blower temperature issue.The manufacturer¿s international service technician replaced the blower to address the reported problem.The unit was checked overall, run in tested, cleaned and functionally tested and no abnormality was confirmed.During further investigation (fi), a visual inspection of the blower assembly outer surface revealed no evidence of damage or contamination.The blower assembly end cap was removed and a visual inspection of the impellers and surroundings did not reveal any signs of rubbing, damage, or contamination.The lm20 temperature sensor output was verified within specifications.The blower assembly was installed into an fi test ventilator and booted up in normal ventilation mode.No errors were detected.The fi test ventilator was allowed to run four (4) hours on normal ventilation mode.No error codes were generated.The fi test ventilator was booted into diagnostic mode and allowed to run another four (4) hours.No error codes were generated and the blower temperature remained at the lower end of normal operating temperatures.The test ventilator booted up and delivered breaths on ac.The air flow accuracy test was performed and passed.The determination could not be made that the device failed to meet specifications.The device was not being used for treatment when the reported event occurred, and there is no relationship of the device to the reported problem.The blower assembly passed all testing.A high blower temperature alarm (1122 error code) could not be duplicated.There were no faults found with the blower assembly.
|