Troubleshooting Guide
CN-IC1-09
Title
:
i-Controller REV.200 Alarms (Troubleshooting)
EXTERNAL
3
1-19MAY2021
CO
2
Notice (if equipped)
The CO
2
notice is generated when the CO
2
level in the space is too high. When a high CO
2
level is detected,
“
Hi LvL
” will be
displayed next to “
CO2 Level Status
” on the
Alarms
screen.
This notice is generated when the CO
2
sensor, located in the space or return air stream, exceeds the specified ppm limit,
typically 1,000 ppm. The notice will cause the outside air damper (OAD) to open an additional maximum specified
percentage, set to 15% by default. Once the CO
2
level in the space is lowered, the unit will resume regular operation.
CO2 level
higher than
set point?
Verify unit operation
(see description above)
Yes
•
Compare the sensor reading with that of the
hand-held meter to ensure its accuracy
•
Verify that the sensor dip switches and/or
jumpers are set up correctly
•
Verify that the correct sensor was installed (4
wire vs. 3 wire)
•
Verify the notice input points on the board or
controller
•
Verify that program is set for the correct scale
and type of sensor
No
Notice
cleared?
Yes
Contact Tech
Support
1-888-598-1198
No
Issue resolved
CO2 Notice
present
Verify CO2 reading in
the space with meter
