CareFusion LTV 1200 Service Manual page 81

Symptoms
A control doesn't
activate.
Set Value knob
doesn't operate.
Continued...
A control doesn't
activate
Set Value knob
doesn't operate
Page 7-4
Possible Causes
Control not active in
selected mode.
Controls are locked.
Control is not selected.
Controls are limited.
Wrong model selected.
Front panel ribbon cable
not properly connected.
Front panel ribbon cable
damaged.
Defective switch.
®
LTV 1200, 1150, and 1100 Ventilator Service Manual
What to Do
If a control is dimmed, it is not active in the
currently selected mode and changing its
setting does not affect ventilation. (See the
®
LTV 1200, 1150, or 1100 Ventilator
Operator's Manual for an explanation of
Bright, Dim and Blank Control
Displays.)
If the controls are locked, a LOCKED
message will be displayed when a control
is selected.
To unlock in EASY mode, press and
release the Control Lock button. To
unlock in HARD mode, press and hold the
Control Lock button for 3 seconds. (See
®
the LTV 1200, 1150, or 1100 Ventilator
Operator's Manual for an explanation of
the CTRL UNLOCK feature and Control
Lock button.)
Before a control value can be changed, the
control must be selected. To select a
control, press the associated button. When
a control is selected, it is displayed at
normal intensity and all other controls are
®
dimmed. (See the LTV
1100 Ventilator Operator's Manual for an
explanation of how to use the controls.)
A control's value may be limited by the
current settings of other controls. To
change the value of the current control,
change the value of the flashing controls.
®
(See the LTV 1200, 1150, or 1100
Ventilator Operator's Manual for an
explanation of Control Limiting
If an incorrect model is selected, some
controls may not be lit and will not
operate. Verify the model number selected
in VENT MTNCE, MODEL matches the
model number on the front of the
ventilator. See Chapter 6 -Maintenance &
Calibration for instructions.
Remove the power board to access the
ribbon cable connection on the main
board. Disconnect and reconnect the front
panel ribbon cable connector. See Main
Board Assembly in Chapter 8 for
instructions. Handle the ribbon cable
carefully to avoid scratching or damaging
it.
Replace the membrane switch panel and
overlay. See Front Panel in Chapter 8 for
instructions
1200, 1150, or
.)
p/n 18603-001, Rev. J