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B-H90.0.01.DB2-2.1
8 | Error and system messages
G 1910-02
8
Error and system messages
Display
Meaning
Possible
causes
Remedy
----
No signal from the
sensor
Measurement far
outside of the meas-
uring range
Sensor not ready
CO
2
concentration
too high
Defective sensor ad-
justment
Sensor defect
Wait the start-up time of the
sensor
Place the product in clean
outdoor air
Perform sensor adjustment
Send in for repair
----
The display value
could not be deter-
mined
Sensor not ready
Sensor defect
Wait the start-up time of the
sensor
Send in for repair
No display,
unclear char-
acters or no
response
when but-
tons are
pressed
Rechargeable bat-
tery depleted
System error
Product is defective
Rechargeable bat-
tery depleted
Error in the product
Product is defective
Charge battery
Replace rechargeable bat-
tery
Send in for repair
BAT LO
Rechargeable bat-
tery depleted
Rechargeable bat-
tery discharged
Rechargeable bat-
tery defect
Charge battery
Replace rechargeable bat-
tery
(AL ERR.1
Zero point adjust-
ment defective
Incorrectly meas-
ured CO
2
concentra-
tion for adjustment
Expose sensor to a test gas
with 0 ppm CO
2
(AL ERR.2
(AL ERR.3
Defective gradient
compensation
Incorrectly meas-
ured CO
2
concentra-
tion for adjustment
Incorrect CO
2
con-
centration
Expose sensor to a test gas
with known CO
2
concentra-
tion
Enter correct value
(AL ERR.5
Time for stability
recognition ex-
ceeded
Stability recognition
lasts longer than 10
minutes
Provide a consistent flow
with a constant CO
2
concen-
tration
ERR.1
Measuring range ex-
ceeded
Measurement too
high
Defective sensor ad-
justment
Sensor defect
Stay within allowable meas-
urement range
Perform sensor adjustment
Send in for repair
ERR.2
Measuring range is
undercut
Defective sensor ad-
justment
Sensor defect
Perform sensor adjustment
Send in for repair
ERR.7
Sensor error
Defective sensor ad-
justment
Sensor defect
Perform sensor adjustment
Send in for repair
