LCD screen
The LCD screen displays the menus, monitoring screens and alarm status.
Values on this LCD screen and other screens throughout the User Guide are examples only.
ResMed USB stick Mains power
External power supply
Internal battery
Title bar
Settings
Therapy status bar
Ramp time
Program
Therapy mode
Patient mode 
or Clinical mode 
Current screen/number of screens within the menu
Scroll bar
Starting therapy
Performing a functional test
Make sure your device is functioning properly each time before starting therapy.
If any problems occur, see “Troubleshooting” on page 22. Please also check other provided User Instructions for troubleshooting information.
1Turn off the device by pressing the power switch 
at the back of the device.
2Check condition of device and accessories.
Inspect the device and all the provided accessories. If there are any visible defects, the system should not be used.
3Check the circuit configuration.
Check the integrity of the circuit configuration (device and provided accessories) according to the setup descriptions in this User Guide and that all connections are secure.
4Turn on the device and check alarms.
Press the power switch 
at the back of the device once to turn on the device.
Check that the alarm sounds a test beep and the LEDs (visual indicator) for the alarm signal and the Alarm mute button flash. The device is ready for use when the Treatment screen
is displayed. If the display shows the Reminder page, follow the instructions, then press
to display the Treatment screen.
5Check batteries.
Disconnect the device from the mains and external battery (if in use) so that the device is powered by the internal battery. Check that the Battery use alarm is displayed and the battery LED is on.
Note: If the charge state of the internal battery is too low, or if the battery is empty, an alarm occurs. See the Alarm troubleshooting section on page 22 for further information.
Reconnect the external battery (if in use) and check that the LED for the external power supply is lit. The External DC power use alarm will be displayed and the Alarm LED will light.
Reconnect the device to the mains.
Starting therapy | 11 |