13
CO
2
level is not displayed on the MAIN PCB
“0” is displayed on the MAIN PCB.
No
Replace the MAIN PCB.
Check whether K9 in the MAIN PCB is
switched off.
Is K9 switched off?
Proceed to the next
installation step.
Is CO
2
level displayed?
No
Switch off the K9
and check for display.
Yes
Yes
TROUBLESHOOTING
(Continued)
After switching off the K9, reset the
power and check whether CO
2
level is
displayed.
The error in the CO
2
Sensor is only detected after 2 minutes when powered on.
The operation test needs to last longer than 2 minutes to be valid.
Caution
MOS-C1_IM_E_29348-1.indd 13
2008-01-31 ｿﾀﾈﾄ 3:57:18
