D-3 
CO
2
 module 
EtCO
2
 Too High  M 
The monitored parameter value exceeds the alarm limit.   
1. Check the patient type. 
2. Check the alarm limits. 
EtCO
2
 Too Low  M 
The monitored parameter value exceeds the alarm limit. 
1. Check the patient type. 
2. Check the alarm limits. 
Apnea CO
2
 M 
The time of failure to detect respiration by the CO
2
 
module exceeds Apnea Tinsp. 
1. Check the patient. 
2. Check apnea time setup. 
3. Check the connections of CO
2
 module sampling device. 
SpO
2
 
module 
SpO
2
 Too High  M 
The monitored parameter value exceeds the alarm limit. 
Check the patient’s physiological condition. Check if the 
patient type and the alarm limit settings are correct. 
SpO
2
 Too Low  M 
The monitored parameter value exceeds the alarm limit.   
Check the patient’s physiological condition. Check if the 
patient type and the alarm limit settings are correct.   
SpO
2
 Desat  H 
The SpO
2
 value falls below the desaturation alarm limit. 
Check the patient’s condition and check if the alarm limit 
settings are correct. 
PR Too High  M 
The monitored parameter value exceeds the alarm limit.   
Check the patient’s physiological condition. Check if the 
patient type and the alarm limit settings are correct.   
PR Too Low  M 
The monitored parameter value exceeds the alarm limit.   
Check the patient’s physiological condition. Check if the 
patient type and the alarm limit settings are correct.   
No Pulse  H 
The pulse signal was so weak that the monitor cannot 
perform pulse analysis. 
Check the patient’s condition, SpO
2 
sensor and 
measurement site.