5-12 
 
2.  Unplug the communication cable from the multi-parameter board and the mainstream 
CO2 interface cable. Take out the CO2 interface panel. Then unscrew the two nuts and 
pull out the mainstream CO2 assembly. 
 
NOTE 
z  When reinstalling the mainstream CO2 assembly, make sure you place the CO2 
interface panel in the proper direction as shown below. The positioning rib is at the 
top. 
 
 
Positioning rib