3 General inspection and servicing
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Replace the air filter
Replace the air filter
Replace the air filter
Replace the air filter
1 Remove the filter cartridge from the flow generator.
2 Replace the air filter, with the blue side of the filter material facing out from the unit.
3 Check the appropriate box in the Record of Service window.
Caution
Only use genuine ResMed spare parts, because the filter affects the flow characteristics of
the flow generator, which in turn affects the pressure supplied to the patient.
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Keypad test
Keypad test
Keypad test
Keypad test
1 Switch off the flow generator, then switch it back on. Wait for the
Welcome
message to
appear and check that the LCD back light and LEDs beneath the keypad are illuminated.
Note:
The LCD backlight and LEDs may not be clearly visible in bright light.
2 Press the Left key to enter the patient menu. Use the up/down button to cycle through the
menu and the Left and Right keys to set and change options. Confirm that all button presses
produce the appropriate response.
3 Press the start button and confirm that the flow generator starts. Press the button again and
confirm that the flow generator stops.
4 Record the results by checking the appropriate box in the Record of Service window.
5 Press the
Floppy disk
button to save the results.
If the flow generator fails this test, replace the keypad by following the procedures given in
Section 5 Replacing major subassemblies
. Once the keypad has been replaced, repeat the
keypad test procedure.
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Pressure calibration test
Pressure calibration test
Pressure calibration test
Pressure calibration test
Caution
Make sure the flow generator has been warmed up for at least 15 minutes before
proceeding with the remaining tests
1 Close the Record of Service window.
2 Press the
Record
button and select the file which contains the flow generator settings.
3 Select
Performance Tests>Pressure calibration test
from the main window, or press the
Perform the pressure calibration test
button.
4 Set up the test equipment as instructed by the software.
5 Select
Next
and follow the steps as instructed.
If the flow generator fails this test, follow the procedures outlined in
Section 7 Calibration
procedures
to do a full recalibration of the flow generator.
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