LTV 1150 - Alarms

Page 7-32 LTV
®
1200/1150 Ventilator Service Manual p/n 18603-001, Rev. C
Alarms
Many alarms such as HIGH PRES or LOW O2 PRES can occur during normal operation.
Information on addressing alarms is covered in the LTV
®
1200 or the LTV
®
1150 Ventilator
Operator's Manual. Single occurrences of some alarms, such as HW FAULT or RESET may be
caused by ESD. If these alarms recur, and for other alarms that do not usually occur during
normal operation, follow the instructions in this section or contact Pulmonetic Systems using the
contact information at the front of this manual.
Symptoms Possible Causes What to Do
Alarm silence was already
active (Silence Reset LED
is red).
The ventilator alarms can be silenced for
60 seconds by pressing the Silence
Reset button. If the alarm is already
silenced (Silence Reset LED is red), it will
not sound again until the silence period
expires.
Alarm automatically
silenced after 3 seconds
because condition cleared.
When an alarm occurs, the audible alarms
sound for a minimum of 3 seconds or for
as long as the condition exists. Some
alarms, such as HIGH PRES may clear
almost immediately and the alarm will
sound for only 3 seconds.
HIGH PRES
occurred but alarm
did not sound.
High pressure alarm delay
is on - HP DELAY is set to
DELAY 1 BRTH or DELAY
2 BRTH.
When a high pressure condition is
detected, the HIGH PRES message is
displayed and the High Pres Limit control
is flashed. If the HP DELAY option is set
to NO DELAY, the audible alarm is
sounded immediately.
When the HP DELAY option is set to
DELAY 1 BRTH or DELAY 2 BRTH, the
audible is not sounded until the second or
third consecutive breath with a high
pressure condition. (See the LTV
®
1200 or
the LTV
®
1150 Ventilator Operator's
Manual for an explanation of this feature.)
Ventilator did not run for
more than 1 minute.
Turn the ventilator on and run for a
minimum of 1 minute to charge the alarm
capacitor.
Defective or disconnected
sounder.
Run an alarm test. See Alarm Test in
Chapter 2 for instructions.
If the alarm does not sound, open the
ventilator and verify that the alarm
sounder connector is securely connected
to the power board.
Replace the alarm sounder. See page 8-
55 for instructions.
Alarm doesn’t sound.
Defective power board.
Replace the power board. See Power
Board Assembly in Chapter 8 for
instructions.