Sinclair SDV 6 Service Manual page 102

8.1.33 dE3 - CO2 sensor fault
Error display
The faulty IDU and other IDUs of the same system: operate normally.
Error impact
ODU of the same system: operate normally.
Error trigger
If the main control board of an IDU has lost communication with CO2 sensor for 2 min
Error recovery
Automatic recovery
Possible cause
See the Troubleshooting section.
Troubleshooting
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.
Digital display
Cause 1:
improperly connected to the sensor
Cause 2: The IDU main control board
dE3
Cause 3:
cleared after causes 1/2 have been
eliminated, the CO2 sensor is
Panel, display box, and wired controller
CO2
sensor pins are
control board
is damaged
If the error cannot be
damaged
Display position
Properly connect
the pins
Replace the main
control board of the
IDU
CO2
Replace the
sensor (1)
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