Auto-On / Auto-Off Test; Backlight Test For Lcd And Keypad - DeVilbiss SleepCube nCPAP Service Manual

C. Auto-ON / Auto-OFF Test
Additional equipment required: 6 ft x 22 mm smooth bore
tubing.
1. Apply AC power to the unit. If the blower is running, press
the ON/OFF key on the keypad so that the blower stops
and the LCD displays 'OFF'.
2. While pressing both the Down arrow and Delay keys,
press the ON/OFF key to start the blower and enter clinical
mode.
3. Press the Next Item key until Enable Menu is displayed,
then press the Down Arrow key to enter the sub-menu.
4. Press the Next Item key until the Auto-ON setting is dis-
played. Use the UP or DOWN arrow keys to set the value
to Enabled.
5. Press the Next Item key until the Auto-OFF setting is dis-
played. Use the UP or DOWN arrow keys to set the value
to Enabled.
6. Press the ON/OFF key on the keypad so that the blower
stops and OFF is displayed on the LCD.
7. Connect the 6 ft x 22 mm smooth bore tubing to the
CPAP and block the airfl ow with your hand or a plug.
8. Turn the blower ON by pressing the ON/OFF key on the
keypad.
9. Keep the airfl ow blocked for two minutes. Verify that the
blower continues running and no mask alerts appear.
10. Unblock the smooth bore tubing to open the unit's air-
fl ow.
11. Verify that after approximately 10 seconds the LCD shows
'Mask OFF'. If the mask alert did not appear, go to step 14.
12. After another 20 seconds the blower should turn OFF via
the Auto-OFF feature. Wait approximately two minutes
after the blower turns OFF. Verify that the blower does not
turn back ON without breathing present.
13. Tap the palm of your hand on and off the end of the tub-
ing to simulate breathing and verify that the blower turns
ON via the Auto-ON feature.
14. If the Auto-OFF or Auto-ON features do not work correctly,
perform a full calibration using the Manual Calibration
Procedure.
D. Backlight Test for LCD and Keypad
No additional equipment required.
1. Apply AC power to the unit. If the blower is running, press
the ON/OFF key on the keypad so that the blower stops
and the LCD displays OFF.
2. Press the ON/OFF key and verify that the LCD and keypad
backlights are lit.
3. Wait one minute and verify that the LCD and keypad back-
lights reduce intensity.
4. Press any keypad key, except ON/OFF, and verify that the
LCD and keypad backlights return to full intensity.
5. If the LCD or keypad backlights did not function correctly
during this test, replace the LCD, keypad and/or PC control
board.
EN
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LT-2026