Alarm messages
7-10
10070389 Rev. A
Puritan Bennett™ 700 Series Ventilator System Service Manual
LOW INT BATTERY
(no diagnostic code
logged)
HIgh-priority alarm.
Low internal battery voltage detected
during POST, although AC power is
sufficient.
Autoreset after two minutes. Once reset,
alarm is not reannunciated.
1. Verify reliable AC power source.
2. Check internal battery connections.
3. Replace internal battery.
4. Replace BBU PCB.
LOW O
2
SUPPLY
(no diagnostic code
logged)
High-priority alarm.
Low oxygen supply pressure. Ventilation
continues with reduced %O
2
. (Alarm is not
activated when %O
2
setting is 21%.)
Autoreset when sufficient oxygen supply
pressure is detected.
The ventilator may have been calibrated at
a high altitude then moved to a lower
altitude.
1. Check patient.
2. Verify integrity of oxygen supply and
connections. Increase oxygen supply
pressure if necessary.
3. Perform these calibrations: O
2
pressure
calib, then (if applicable) Reg altitude
calib (Section 4.2.3.2.2).
4. Replace oxygen regulator pressure
transducer.
5. Replace pressure solenoid PCB.
LOW RESP RATE
(760 only, no diagnostic
code logged)
Medium-priority alarm.
The ventilator cannot deliver the current
RESPIRATORY RATE setting (insufficient
time for piston to retract and deliver next
breath). Monitored respiratory rate lower
than RESPIRATORY RATE setting by one
breath per 10% of the setting.
Autoreset after 30 seconds. Pressing alarm
reset key immediately disables the alarm
and clears the autoreset, and the alarm is
not reannunciated unless the condition
perists after you change settings.
1. Check patient.
2. Check for ventilator breathing circuit
disconnect or occlusion.
3. Consider appropriate RESPIRATORY
RATE and other mandatory settings.
4. Consider adequacy of ventilatory
support and patient comfort.
LOW SYS TEMP ALERT
(diagnostic code 6009)
High-priority alarm. Technical alert.
Temperature inside ventilator enclosure
too low.
Autoreset when temperature within range.
1. Make sure room temperature is not too
low. Make sure that ventilator has
warmed up and T
box
attained a steady
state.
2. Replace pressure solenoid PCB.
MOTOR OVER TEMP
(diagnostic code 6002)
High-priority alarm.Technical alert.
Motor temperature too high.
Autoreset when temperature within range
(if within two minutes). Escalates to a 9008
condition (causing a ventilator reset) if
temperature out of range longer than two
minutes.
1. Check or replace main fan filter.
2. Check for proper operation of main
fan.
3. Replace motor/encoder.
4. Replace controller PCB.
NEBULIZER FAILED
(diagnostic code 6040)
Nebulizer failed alert. Power not being
supplied to nebulizer.
1. Check cable connection between the
communications panel and the
nebulizer.
2. Replace cable.
3. Check cable connection between the
communications PCB and the controller
PCB.
4. Replace cable.
5. Replace communications PCB.
6. Replace nebulizer.
Table 7-2: Alarm messages (continued)
When you see this
message:
It means...
Do this...
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