The user facility reported that the criticool exhibited a "halt 1" alarm and subsequently exhibited a "halt 4" alarm after the device was restarted.Following receipt of the user facility's report, belmont's technical support engineer investigated the criticool and discovered a fine black powder around the pump, suggesting that the pump diaphragm loosened from the motor and caused the unit to exhibit the reported alarms.A root cause of the loosened pump diaphragm could not be established.The pump was replaced and the unit subsequently passed all test specifications.The criticool is equipped with self-testing routines that continuously monitor system operation and displays a fault message in the event of a system fault.The unit exhibits a "halt 1" alarm when the system detects a flow problem in operation mode and exhibits a "halt 4" alarm when a flow problem is detected during self-test.In the event of a halt 1 or halt 4 alarm, the system disables by turning off the pump and displays an alarm message with instructions for corrective measure.It was reported that another criticool was used to proceed with the case; no patient injury was reported.A review of past complaints indicates that no trend has been identified for this type of issue.Should additional information become available, a supplemental report will be provided.
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