Covidien Puritan Bennett 700 Series, Руководство по обслуживанию

Страница: 255 / 439

Alarm messages
Puritan Bennett™ 700 Series Ventilator System Service Manual 10070389 Rev. A 7-9
LOW EXT BATTERY
(no diagnostic code
logged) High-priority alarm.
Low external battery voltage detected
during POST, although AC power is
sufficient. This alarm occurs only when the
internal battery is also low or missing.
Autoreset after two minutes or when
external battery is replaced. Once reset,
alarm is not reannunciated. 1. Verify reliable AC power source.
2. Check external battery connections.
3. Replace external battery.
4. Replace BBU PCB.
LOW INSP PRESSURE
(no diagnostic code
logged) High-priority alarm.
Monitored circuit pressure never rises
above LOW INSP PRESSURE setting during
inspiration (this alarm is only active during
A/C and SIMV modes).
Autoreset when circuit pressure is at least
equal to alarm setting during inspiration. 1. Check patient.
2. Check for ventilator breathing circuit
disconnect.
3. Consider appropriate LOW INSP
PRESSURE and ventilator settings.
LOW INSP PRESSURE1
(diagnostic code 6023) High-priority alarm. Technical alert.
Exhalation pressure transducer reading (P
e
)
fell below -40 cmH
2
O, possibly due to a
patient outdrawing the ventilator’s set
flow rate.
Autoreset when pressure within range.
1. Make sure PEAK FLOW setting is
adequate to meet patient’s demand.
Consider appropriate LOW INSP
PRESSURE and ventilator settings.
2. Make sure air intake filter is not
occluded.
3. Check reasonableness of P
e
reading
using Sensor data menu while
ventilation is occurring. Perform a P
e
gain calibration as required.
4. Replace pressure solenoid PCB.
LOW INSP PRESSURE2
(diagnostic code 6024) High-priority alarm. Technical alert.
Inspiration pressure transducer reading (P
i
)
fell below -40 cmH
2
O, possibly due to a
patient outdrawing the ventilator’s set
flow rate.
Autoreset when pressure within range.
1. Make sure PEAK FLOW setting is
adequate to meet patient’s demand.
Consider appropriate LOW INSP
PRESSURE and ventilator settings.
2. Make sure air intake filter is not
occluded.
3. Check reasonableness of P
i
and P
a
readings using Sensor data menu while
ventilation is occurring.
4. Replace pressure solenoid PCB.
LOW INSP PRESSURE3
(diagnostic code 6025) High-priority alarm. Technical alert.
Cylinder pressure transducer reading (P
cyl
)
fell below -40 cmH
2
O, possibly due to a
patient outdrawing the ventilator’s set
flow rate.
Alarm does not autoreset.
1. Make sure PEAK FLOW setting is
adequate to meet patient’s demand.
Consider appropriate LOW INSP
PRESSURE and ventilator settings.
2. Make sure air intake filter is not
occluded.
3. Check reasonableness of P
cyl
reading
using Sensor data menu while
ventilation is occurring. Perform a P
cyl
gain equalization as required.
4. Replace pressure solenoid PCB.
Table 7-2: Alarm messages (continued)
When you see this
message:
It means... Do this...