CareFusion LTV 1200 Service Manual page 80

Symptoms
Low Min Vol display
flashing.
O % (O Flush)
2 2
flashing.
Control display
flashing when setting
a control.
A display or LED does
not illuminate.
Ventilator is running
but displays are
turned off.
p/n 18603-001, Rev. J
Possible Causes
LOW MIN VOL alarm
occurred.
LOW O2 PRES or HIGH
O2 PRES alarm occurred.
Control setting is limited.
Wrong model selected.
Misaligned LED.
Defective LED or display.
Defective main board.
Displays are blanked while
on battery power.
Defective main board.
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LTV 1200, 1150, and 1100 Ventilator Service Manual
What to Do
The Low Min Vol display is flashed and
the LOW MIN VOL message is displayed
when a low minute volume alarm occurs.
The display will continue to flash even
after the condition clears. (See the LTV
1200, 1150, or 1100 Ventilator Operator's
Manual for an explanation of the LOW
MIN VOL alarm feature.)
The O % (O Flush) display is flashed and
2 2
the LOW O2 PRES or HIGH O2 PRES
message is displayed when a low or high
O pressure alarm occurs. The display will
2
continue to flash even after the condition
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clears. (See the LTV 1200 Ventilator
Operator's Manual for an explanation of
the LOW O2 PRES and HIGH O2 PRES
alarm features.)
A control's value can be limited by the
current settings of other controls. (See the
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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.
If displays are operating but misaligned,
remove the main board and realign the
LEDs or displays. See Main Board
Assembly in Chapter 8 for instructions.
If a display is not operating during the
display test, replace the main board. See
Main Board Assembly in Chapter 8 for
instructions.
To conserve battery life while running from
the internal battery, most of the displays
are turned off when no changes are made
to the control settings for 60 seconds. To
turn the displays back on, touch any
control or button or turn the Set Value
knob.
Replace the main board. See Main Board
Assembly in Chapter 8 for instructions.
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