6.1.32 dE3 - CO2 sensor fault
Panel, display box, and wired controller
The faulty IDU and other IDUs of the same system: operate normally.
ODU of the same system: operate normally.
If the main control board of an IDU has lost communication with CO2 sensor for 2 min
See the Troubleshooting section.
dE3
Cause 2: The IDU main control board
is damaged
Cause 3: If the error cannot be
cleared after causes 1/2 have been
eliminated, the CO2 sensor is
damaged
Replace the main
control board of the
IDU
Replace the CO2
sensor (1)
Cause 1: CO2 sensor pins are
improperly connected to the sensor
control board
Properly connect
the pins
Note 1:
1) The CO2 sensor pins should be inserted on the sensor control board according to the wiring nameplate.
2) When inserting and removing the sensor, do not press and deform the sensor surface, as it may change
its internal optical path and cause zero drift to the sensor, making the measuring results of sensor too large
or even out of range.
3) When inserting and removing the sensor: Operators must keep their hands clean and dry; the antistatic
wrist strap should be worn on the wrist; the metal piece inside the antistatic wrist strap should be in close
contact with the skin; and the metal clamp of the antistatic wrist strap should be placed at the exposed
copper grounding wire.
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