D-1
D Alarm Messages
This chapter lists only the most important physiological and technical alarm messages. Some
messages appearing on your ventilator display may not be included.
Note that in this chapter:
Column L stands for the default alarm level: H for high, M for medium and L for low. “●”
indicates that the alarm level is user-adjustable.
For each alarm message, corresponding actions are given instructing you to troubleshoot
problems. If the problem persists, contact your service personnel.
AA stands for any of the five anesthetic agents: Des (desflurane), Iso (isoflurane), Enf
(enflurane), Sev (sevoflurane), or Hal (halothane).
D.1 Physiological Alarm Messages
Source Alarm message L Cause and action
Paw Too High H Ppeak is higher than the Paw high alarm limit setting.
Decrease tidal volume setting or increase Paw high alarm
limit setting.
Paw Too Low H Ppeak is lower than the Paw low alarm limit setting for 20
seconds. Increase tidal volume setting or decrease Paw high
alarm limit setting.
FiO2 Too High M FiO2 is higher than the high alarm limit setting. Decrease
O2 flow in the fresh gas or increase high alarm limit.
FiO2 Too Low H FiO2 is lower than the low alarm limit setting. Increase O2
flow in the fresh gas or decrease low alarm limit.
TVe Too High M TVe is higher than the high alarm limit setting. If ventilation
mode is switched or settings for ventilator parameters are
changed, this alarm is disabled temporarily within nine
breathing cycles after being set. Decrease tidal volume
setting or increase high alarm limit.
Ventilator
TVe Too Low M TVe is lower than the low alarm limit setting. If ventilation
mode is switched or settings for ventilator parameters are
changed, this alarm is disabled temporarily within nine
breathing cycles after being set. Increase tidal volume
setting or decrease low alarm limit.
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