Alarm messages
7-8
10070389 Rev. A
Puritan Bennett™ 700 Series Ventilator System Service Manual
LO EX TIDAL VOLUME
(no diagnostic code
logged)
Medium-priority alarm.
Monitored tidal volume less than LOW
TIDAL VOLUME setting for three out of
four consecutive breaths. If LOW TIDAL
VOLUME ALARM setting = 0 and breath
type is PCV or PSV, this alarm indicates that
monitored tidal volume is less than 3 mL
for three out of four consecutive breaths.
Autoreset when monitored value is at least
equal to alarm setting for three out of four
consecutive breaths, or (if LOW TIDAL
VOLUME = 0 and breath type is PCV or PSV)
when monitored value is greater than
three mL for three out of four consecutive
breaths.
1. Check patient.
2. Consider appropriate LOW TIDAL
VOLUME, TIDAL VOLUME, and
SUPPORT PRESSURE settings.
3. If flow sensor was recently replaced,
make sure calibration constants were
correctly entered.
4. Replace exhalation flow sensor.
5. Replace pressure solenoid PCB.
6. Replace controller PCB.
LOSS AC POWER
(no diagnostic code
logged)
Medium-priority alarm.
Loss of AC power, although battery backup
available.
Autoreset after two minutes, or when AC
power restored.
1. Restore AC power, if possible.
2. Check LEDs on BBU PCB to determine
presence of voltages. Replace BBU PCB,
power supply, or power input
component as required.
LOSS OF POWER
(diagnostic code 6001)
High-priority alarm. Technical alert.
The AC supply was lost and the batteries
are so low that all power may be lost. The
unit will shut down in five minutes.
Autoreset when AC power is restored or
battery power is restored. Alarm sounds
until autoreset and for at least two
minutes following loss of both battery and
AC power.
1. Restore AC power, if possible.
2. Check battery connections.
3. Replace batteries (internal and
external, if installed) as necessary.
4. Replace BBU PCB.
NOTE:
Actual battery backup time remaining depends on battery condition and ventilator
settings.
LOW BBU TEMP ALERT
(diagnostic code 6015)
High-priority alarm. Technical alert.
Temperature measured on BBU PCB too
low.
Autoreset when temperature within range.
1. Replace BBU PCB.
2. Replace power supply.
LOW EX MINUTE
VOLUME
(no diagnostic code
logged)
Medium-priority alarm.
Monitored minute volume less than LOW
MINUTE VOLUME setting.
Autoreset when monitored value is at least
equal to alarm setting.
1. Check patient.
2. Consider appropriate LOW MINUTE
VOLUME and ventilator settings.
Table 7-2: Alarm messages (continued)
When you see this
message:
It means...
Do this...
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