8-24 
Message 
Alarm 
Priority 
Cause  Solution 
CO2 module. 
EtCO2 
Overrange 
Low 
The monitored value is 
out of the measurable 
range.  
1. Re-calibrate the CO2 module. 
2. Replace the CO2 module. 
FiCO2 
Overrange 
Low 
The monitored value is 
out of the measurable 
range.  
1. Re-calibrate the CO2 module. 
2. Replace the CO2 module. 
CO2 Zero 
Failed 
Low 
The CO2 module is 
faulty.  
1. Re-zero the CO2 module. 
2. Replace the CO2 module. 
CO2 Init Error  High  CO2 initialization error  Replace the CO2 module. 
Incompatible 
CO2 Software 
Version 
High 
The CO2 module is not 
compatible with the 
software version.   
Replace the CO2 module (the M02A 
module is not supported). 
 
8.2.9 Mainstream CO
2
 module: 
Message 
Alarm 
Priority 
Cause  Solution 
EtCO2 
Overrange 
Low 
The monitored value is 
out of the measurable 
range.  
1. Re-calibrate the CO2 module. 
2. Replace the CO2 module. 
FiCO2 
Overrange 
Low 
The monitored value is 
out of the measurable 
range.  
1. Re-calibrate the CO2 module. 
2. Replace the CO2 module. 
CO
2
 Zero 
Failed 
Low 
The CO2 module is 
faulty.  
1. Re-zero the CO2 module. 
2. Replace the CO2 module. 
CO2 Init Error  High  CO2 initialization error  Replace the CO2 module. 
CO2 Sensor 
Error 
Low 
The sensor of the 
mainstream CO2 module 
is faulty.   
Replace the CO2 module. 
CO2 No 
Sensor 
Low 
The sensor of the 
mainstream CO2 module 
is not connected, or a 
communication error 
occurs.  
Replace the CO2 module.