D-4
Ventilator
parameters
Air Supply
Pressure Low
H The supply gas pressure is low.
Check the status of supply gas. If the alarm continues
although supply gas is normal, contact your service
personnel.
O2 Supply
Pressure Low
H
No Gas Supply
Pressure
H Air supply pressure low and O2 supply pressure low occur
every second simultaneously.
1. Make sure that the patient is in safe ventilation status.
2. Check the actual pressures of Air and O2 supplies.
3. Check that Air and O2 supply devices and connections
are in good condition.
4. Check Air and O2 supply pressure switches.
Airway Leak? L The airway is leaky. Check the airway for leakage and
restore it to good condition.
Airway
Obstructed?
H The airway is obstructed.
Check the airway for leakage and restore it to good
condition.
Tube
Disconnected?
H The tube is disconnected.
Restore tube connection.
TV Not Achieved L Tidal volume is less than the set tidal volume by over
70%.
Check ventilation setting parameters to see if the
ventilation volume is too large. Check if the supply gases
are normal. Check if the expiratory flow sensor has a
deviation and perform zero calibration. Check the hoses
for leakage.
Pinsp Not
Achieved
L Inspiratory pressure is less than the set inspiratory pressure
by over 70%.
Check ventilation setting parameters to see if the
inspiratory pressure is too large. Check if TV high alarm
limit is set too low. Check if the supply gases are normal.
Check the hoses for leakage.
Sustained Airway
Pressure
H The airway pressure measured by any pressure sensor is
greater than or equal to the set PEEP+15 cmH2O for 15s
continuously.
Check the breathing circuit for occlusion. Check if the
expiratory time is too short.
PEEP Too High H The measured PEEP exceeds PEEP+5 cmH2O within any
fully mechanical ventilation cycle.
Check the breathing circuit for occlusion. Check if the
expiratory time is too short.
Tinsp too Long L In PSV mode, the gas delivery time exceeds 4.5s for adult
and 1.5s for pediatric for three continuous cycles. This
alarm is not triggered if pressure sensor or flow sensor is
faulty.
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