D-7 
CO2 Low Airway 
Pressure 
L The airway pressure is too low (<428 mmHg).An error 
occurred to the airway pressure. Check the patient and 
pneumatic connections. Attempt to restart the ventilator. 
O2 High 
Barometric 
L The barometric pressure is greater than 790 mmHg. 
Check the pneumatic connections. Make sure that the 
ventilator application site meets the environmental 
specifications. Check for special sources that affect the 
ambient pressure. Attempt to restart the ventilator. 
CO2 Low 
Barometric 
L The barometric pressure is less than 428 mmHg. 
Check the pneumatic connections. Make sure that the 
ventilator application site meets the environmental 
specifications. Check for special sources that affect the 
ambient pressure. Attempt to restart the ventilator. 
CO2 Hardware 
Error 
H Errors may occur to: 
1. External A/D sampling 2.5V 
2. 12V power supply voltage 
3. Internal A/D sampling 2.5V 
4. Pump 
5. 3-way valve 
Restart the ventilator. If the problem persists, contact your 
service personnel. 
CO2 Sampleline 
Occluded 
L An error or occlusion may occur to the sampling line. 
Check the CO2 pneumatic line. 
CO2 Zero Failed  L Deviation of gain input signal is too great to be adjusted. 
CO2 System Error  L The alarm can be triggered by multiple system errors. 
Restart the ventilator. If the problem persists, contact your 
service personnel. 
CO2 No Watertrap  L The water trap is disconnected or is not connected 
properly. 
Check the water trap. 
EtCO2 Overrange  L The measured parameter value is outside the measurement 
range (error range is counted). 
Do the test after zeroing and calibration. If the problem 
persists, contact your service personnel. 
FiCO2 Overrange  L