P
AGE
77
1127179,
V
ER
.
02
D
REAM
S
TATION
B
I
PAP
S/T
AND
AVAPS
S
ERVICE
&
T
ECHNICAL
R
EFERENCE
M
ANUAL
Problem/Failure Mode
Possible Cause
Steps to Take
Ramp Does Not Work
•
Mechanical button failure
•
Ramp feature not
enabled
•
Ramp pressure set the
same as prescribed
pressure
•
Check for physical damage or
enclosure separation.
•
Ensure ramp feature is
enabled.
•
Ensure ramp pressure is set
lower than prescribed
pressure.
The Display is Erratic
•
The device has been
dropped or mishandled
•
The device is in an area
with high Electromagnetic
Interference (EMI)
emissions.
•
Problem with UI ribbon
cables and connections.
•
Unplug the device and
reapply power.
•
Relocate the device to an
area with lower EMI
emissions (cellular phones,
computers TVs, etc.).
•
Check UI connections.
•
Replace UI Panel if faulty.
Back Light Does Not Work
•
Faulty PCA
•
Ambient light sensor is
blocked.
•
Replace PCA if ambient light
sensor is faulty.
•
Verify nothing is blocking the
ambient light sensor.
Back Light Dims Too Quickly
•
User perception
•
Ambient light sensor not
functioning
•
Verify ambient light sensor is
functioning by covering the
sensor hole on the Top
Enclosure.
•
Replace PCA if ambient light
sensor does not function.
Back Light Does Not Dim
•
Ambient light sensor not
functioning
•
Verify ambient light sensor is
functioning by covering the
sensor hole on the Top
Enclosure.
•
Replace PCA if ambient light
sensor does not function.
