11
TROUBLE SHOOTING
Can’t power on
• Make sure you press power key more than 0.3
second.
• Check the battery conditions and replace if
necessary.
• Check whether the adaptor is well plugged.
• Move batteries away for one minute and then
re-install.
Display disappear
• Check whether the low battery icon is appeared
before the display is off. If yes, replace with new
batteries.
Fixed readings
• Check whether data hold function was activated.
(HOLD icon at the left top)
Slow response
• Check whether the air flow channels on the rear
were blocked
Error code
E01: CO2 sensor damaged.
E02: The value is under range.
E03: The value is over range.
E04: The original data error results in this error
(DP, WB)
E07: Too low voltage to measure CO2. Replace
batteries or use an adaptor.
E11: Retry humidity calibration.
E17: Retry CO2 calibration.
E31: Temperature sensor damaged.
E34: Humidity sensor damaged.
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