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Working with alarms
The S9 VPAP Tx is fitted with an alarm module that continuously monitors both therapy and device
conditions. Alarms are only activated when therapy is running. An alarm condition can be indicated by an
audible sound, a flashing yellow LED or a message on the screen.
Note: The alarms should be tested after final system setup to ensure the alarms work as required.
Alarms menu
The alarms pre-set for the device are:
• Power fail
• Blocked tube*
• System fault (system error).
* Blocked tube alarm is only triggered reliably for pressures above 10 cm H
2
O.
If the system has not been properly assembled, the device will trigger an alarm. Check that the air tubing
has been properly attached to the device, mask and humidifier.
Clearing the alarm message
When an alarm activates, a corresponding alarm message is displayed.
To clear an alarm message, press
. This allows you to return to the
previously displayed screen.
Note: Alarms are cleared by pressing
.
Testing the alarms
When the device is turned on, the alarm LED will flash and the alarm will sound to confirm that the alarm
is working.
To test the alarm manually or to adjust the alarm volume using the menus, go to the Settings menu and
select Alarm Vol/Test. When the setting is selected and confirmed, the alarm will sound and all LEDs will
be active.
The alarms should be tested weekly. To test some of the alarm conditions, follow the procedures
described below. When completed, stop therapy and return all settings to their original settings
appropriate to the patient before delivering therapy.
Power fail
1. Set up the device with the air tubing attached, but no mask.
2. Press the Start/Stop key to start therapy.
3. Unplug the DC plug of the power supply unit from the rear of the device. The alarm activates
immediately.
4. Plug the DC plug back in. The alarm stops.
Blocked tube
1. Set up the device with the air tubing attached, but no mask.
2. Set pressure above 12 cm H
2
O in CPAP mode.
Note: Blocked Tube alarm only activates above 10 cm H
2
O.
3. Press the Start/Stop key to start therapy.
4. Block the air tubing with your hand. The alarm activates when tubing is blocked for 30–50 seconds.
5. Unblock the air tubing. The alarm stops.
System Fault
No testing for system fault.