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Troubleshooting
If the LED Screen is on, but no figures are being displayed,
press the reset button on the Micro Controller Board. This
will reset the board and it should power up properly.
If the LED screen has no power all together, reset the board.
If the CO
levels have not varied in a while, check the CO
2
2
sensor connection. Disconnect and reconnect the I
C cable
2
on both ends and reset the board.
If this still doesn't work, it is likely to be a power supply issue.
Therefore, check the battery is not flat or that the USB cable
is plugged in correctly.
If the LED screen starts flickering or buzzing check the
battery level. Sometimes a low battery can have this effect.
The 9V battery is only intended to power the device for short
periods of time. For continued data logging make use of the
USB C cable connected to a phone charger, laptop or even
a portable power bank.
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P a g e
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