Service Instructions; Cover Removal; Cover Replacement; Control Pc Board Removal - DeVilbiss SleepCube nCPAP Service Manual

EN

9. Service Instructions

NOTE– After performing any service on the DV54/DV53 PAP,
please test the unit to ensure proper operation and cali-
brate, if necessary.
A. Cover Removal
CAUTION– Failure to wear anti-static equipment during ser-
vice may damage
this device.
1. If using a DV5HH, remove the heated humidifi er and un-
plug the tubing/humidifi er air supply support plug from
the back of the cover and re-plug it in the outlet on the
bottom cover.
2. Position the PAP on a clean, fl at surface with the keypad
facing down.
3. Remove four T-20 screws from the bottom cover.
4. Lift the bottom cover straight up off the top cover.
NOTE– Attempting to reorient the PAP in order to lift the
top cover, instead of the bottom cover, may damage this
device.
5. Wearing an anti-static device, turn the unit over and lift
the top cover off the chassis.
B. Cover Replacement
CAUTION– Failure to wear anti-static equipment during ser-
vice may damage
this device.
1. Wearing an anti-static device, search for and connect all
loose wire harnesses.
2. Place the top cover onto the chassis, with the keypad
facing the cover and fi tting the control board around the
screw posts in the cover.
3. Connect all tubing, carefully creating the correct loops and
eliminating any kinking. (Fig. 1)
4. With the 1/8 inch inside bottom cover foam oriented
correctly and lying fl at, place the bottom cover over the
chassis and onto the top cover, fi tting the screw posts into
proper alignment with the chassis and moving any pro-
truding wire harnesses and tubing away from the edges of
the cover.
5. Replace four T-20 screws.
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LT-2026
C. Control PC Board Removal
CAUTION– Failure to wear anti-static equipment during ser-
vice may damage
this device.
1. Remove the cover. See instructions above.
2. Wearing an anti-static device, lift the cover off the chassis
and place it, with the control board facing up and the
blower facing down, onto a clean fl at surface.
3. Disconnect the two pieces of tubing from the outlet port
side of the chassis.
4. Disconnect accessible wire harnesses: one behind and one
to the left of the tubing in step 3, one at the right corner
under the keypad, and one on the outside of the power
supply board.
5. Remove one T-15 screw, located near the middle of the
board beside LCD screen. Lift the board off the chassis
slowly and disconnect any remaining wire harnesses from
the control board.
6. Place control board keypad facing down onto a clean, fl at,
static-free surface, if returning to the unit.
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