Testing; Pressure Accuracy Test; Keypad Test - DeVilbiss SleepCube Gebrauchsanleitung

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5. Testing

The following test procedures verify correct operation of the
DV54/DV53 PAP and should be performed on all repaired
units.
NOTE– Verify that the DV54/DV53 PAP contains the latest
fi rmware release before conducting maintenance or
repairs. Go to http://www.devilbisshealthcare.com/Prod-
ucts to download the latest fi rmware update. Download
and installation instructions are provided on the web site.
A. Pressure Accuracy Test
Additional equipment required: outlet cap (DV54/
DV53D-620), a calibrated pressure gauge (0-30 cmH2O, ac-
curacy ±0.25 cmH2O)
1. Connect the pressure gauge to the unit outlet port.
2. 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'.
3. While pressing both the Down Arrow and Delay keys,
press the ON/OFF key to start the blower and enter clinical
mode.
4. Press the Next Item key until Set Pressure is displayed.
Use the Up and Down Arrow keys to adjust the pressure
to 12 cmH2O. Wait at least 30 seconds for the pressure to
stabilize.
5. Verify that the displayed pressure matches the pressure
measured on the gauge (pressure setting ±1.0 cmH2O).
Accuracy at other pressure settings can be checked if
needed.
6. If the pressure is out of calibration, turn the blower OFF for
approximately 1 minute to allow auto-calibration to occur.
Turn the blower back ON and allow 30 seconds for the
pressure to stabilize. If the pressure is still out of calibra-
tion, perform a full calibration using the Manual Calibra-
tion Procedure.
7. If manual calibration does not improve pressure accuracy,
there may be a problem with the fl ow path or control
board. Refer to Troubleshooting.
10
LT-2026
B. Keypad Test
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. 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 Delay Time is shown on the
LCD display.
4. Note the Delay Time; then change it by pressing the Up and
Down arrow keys. Use the arrows keys to return the Delay
Time back to the original setting.
5. Use the Previous Item key to return to the Set Pressure
screen.
6. If any of the keypad keys did not function correctly dur-
ing this test, replace the PC control board using Service
Instructions.