DeVilbiss DV63 Standard Plus - Troubleshooting

LT-2320
14
CALIBRATION / TROUBLESHOOTING
a. Close the ball valve so no air ows through.
b. Send the terminal command ‘Pn=0’ to ensure the DV6x device measured pressure is in cmH
2
O.
c. Use the terminal command ‘Tw=’ to change the motor speed to an arbitrary value, thus changing the DV6x device pressure.
d. Send the terminal command ‘PR’ and verify that the DV6x device returned pressure is equal to the pressure measurement from the
external pressure meter. NOTE: The DV6x device returned pressure is in multiples of 10.
e. Repeat the (Step 9) test for various motor speeds.
Once the DV6x device is calibrated, send the terminal command ‘Mo=0’ to put the device in CPAP mode or ‘Mo=1’ to put the device in AutoAdjust
mode as required.
TROUBLESHOOTING
Symptom Action (for symptoms listed at left, follow the steps listed below)
Blower does not start when powered up
(display may be blank).
or
Unit is dead.
1. Examine the CPAP LCD display for error codes.
a. If error code E01 (on second line)— replace control PC board.
b. If display is blank or shows error codes E02, E07, E08, E09, proceed to next step.
NOTE: Wait at least 20 seconds after applying power for error codes to appear on display.
2. Open unit and verify that all wire harnesses are securely connected.
3a. Measure resistance of PC board fuse F2.
The ohmmeter should indicate a short or 0 ohms. If open, replace the control board.
3b. If reading is zero (0) ohms, check the voltage. It should be: 12 volts (+/- .5 volts) if out of spec or not
present – try another desk top power supply
4. Install a known good blower (remove AC power and reapply) – does the good blower run?
a. Yes – replace the blower, burn in for 6 hours and test unit (subjective sound testing should be
performed).
b. No – replace control board.
Blower does not start when powered up and
display shows E06 error code after a short
time.
1. Open the unit and inspect the air intake lter, intake foam components and any internal connections. Replace
any foam pieces that appear damaged.
2. Check for signs of water damage in the unit (the blower assembly, pressure sensor or ow sensor can be
damaged by water). Replace any components that appear damaged.
3. Verify that the blower halves are properly snapped together. No visible gap should be present between the
top and bottom sections.
4. Recalibrate the pressure and ow sensors using Manual Calibration Procedure.
5. If calibration does not resolve issue, install a known good blower (remove AC power and reapply) – does the
good blower run?
a. Yes – replace the blower, burn in for 6 hours and test unit (subjective sound testing should be
performed).
b. No – replace control board.
Blower runs loud. 1. Open the unit and verify that the blower assembly is properly snapped together. No visible gaps should be
present.
2. Check for correct assembly of the foam, blower and silicone isolator.
3. If the unit assembly is correct, replace the blower, burn in for a minimum 6 hours and test unit (subjective
sound testing should be performed).
Pressure or ow out of tolerance
(Pressure ± 0.5 cmH
2
O of setting for Model
(DV63, DV64) (Flow ± 10 L/Min).
OR
Unit not triggering properly.
1. Open the unit and inspect the air intake lter, intake foam components and any internal connections. Verify
the PC Board is inserted into the manifold properly. Replace any foam pieces and/or tubing that appear
damaged.
2. Check for signs of water damage in the unit (the blower assembly, pressure sensor or ow sensor can be
damaged by water). Replace any components that appear damaged.
3. Verify that the blower halves are properly snapped together. No visible gap should be present between the
top and bottom sections.
4. Check the chassis manifold, verify that manifold is aligned on seal surfaces and that the motor wire harness
is routed correctly through the manifold. Replace the chassis manifold if it is damaged.
5. Check pressure and ow after replacing any of the above parts or snapping the blower together. If pressure
and ow are still out of tolerance, go to next step.
6. Calibrate the CPAP using the “Manual Calibration Procedure”.
7. If the above steps do not improve pressure or ow accuracy, replace the control board.