Alarm messages
Puritan Bennett™ 700 Series Ventilator System Service Manual
10070389 Rev. A
7-11
% O
2
HIGH
(no diagnostic code
logged)
High-priority alarm.
Measured oxygen percentage more than
10 percentage points above setting for at
least 30 seconds.
Autoreset when measured %O
2
is within
10 percentage points of setting.
1. Check air intake filter for occlusion.
Replace if necessary.
2. Check oxygen supply.
3. Verify that an oxygen sensor is
installed.
4. Check remaining sensor life (via service
summary) and replace sensor if
required.
5. Perform FIO
2
calibration check.
6. Replace pressure solenoid PCB.
% O
2
LOW
(no diagnostic code
logged)
High-priority alarm.
Measured oxygen percentage more than
10 percentage points below setting for at
least 30 seconds.
Autoreset when measured %O
2
is within
10 percentage points of setting.
The ventilator may have been calibrated at
a high altitude then moved to a lower
altitude.
1. Check patient.
2. Check oxygen supply.
3. Verify that an oxygen sensor is
installed.
4. Check remaining sensor life (via service
summary) and replace sensor if
required.
5. Perform FIO
2
calibration check.
6. Perform these calibrations: O
2
pressure
calib, then (if applicable) Reg altitude
calib (Section 4.2.3.2.2).
7. Replace pressure solenoid PCB.
OCCLUSION
(no diagnostic code
logged)
High-priority alarm.
Ventilator breathing circuit or inspiratory
or expiratory filters occluded. Ventilator
detects above-normal difference between
inspiratory and expiratory pressure
transducers. The ventilator enters occlusion
cycling mode.
Autoreset when the ventilator no longer
detects an occlusion.
1. Check patient.
2. Check ventilator breathing circuit and
inspiratory and expiratory filters for
occlusions or kinks. Empty excess water
from tubes.
3. Press the alarm reset key.
4. If this does not resolve the problem,
provide alternate ventilation and
contact service.
PARTIAL OCCLUSION
(no diagnostic code
logged)
High-priority alarm.
Ventilator breathing circuit or inspiratory
or expiratory filters occluded. Ventilator
detects above-normal difference between
inspiratory and expiratory pressure
transducers. Safety valve remains closed,
ventilation continues.
Autoreset when ventilator fails to detect a
partial occlusion for two consecutive
breaths.
1. Check patient.
2. Check ventilator breathing circuit and
inspiratory and expiratory filters for
occlusions or kinks. Empty excess water
from tubes.
3. Press the alarm reset key.
4. If this does not resolve the problem,
provide alternate ventilation and
contact service.
REPLACE O
2
SENSOR
(diagnostic code 6022)
High-priority alarm. Technical alert.
Oxygen sensor missing or reading out of
range.
Alarm does not autoreset; you must press
alarm reset key.
1. Make sure an oxygen sensor is installed
and securely connected to ventilator
head harness.
2. Perform FIO
2
calibration check.
3. Replace oxygen sensor.
Table 7-2: Alarm messages (continued)
When you see this
message:
It means...
Do this...
Summary of Contents for Puritan Bennett 700 Series
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