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11Starting therapy
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LCD screen
The LCD screen displays the menus, monitoring screens and alarm status.
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 21. Please also check other
provided User Instructions for troubleshooting information.
1 Turn off the device by pressing the power switch at the back of the device.
2 Check 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.
3 Check the circuit configuration.
Check the integrity of the circuit configuration (dev
ice and provided accessories) according
to the setup descriptions in this User Guide and that all connections are secure.
4 Turn 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 Tr
eatment screen.
5 Check 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 lo
w, or if the battery is empty, an
alarm occurs. See the Alarm troubleshooting section on page 21 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.
6 Check H4i heated humidifier (if in use).
Check that the warm-up feature is displayed in the Tr
eatment screen. Start the warm-up
feature. Check that the humidifier warm-up symbol is displayed on top of the screen.
Warm-up feature H4i
Program
Mains power
ResMed USB stick
Therapy status bar
Internal battery
Title bar
Therapy mode
Ramp time
Settings
External power supply
Current screen/number of
screens within the menu
Scroll bar
Patient mode or
Clinical mode