Document
UMA 192
Rev
1
Page
11 (12)
Error codes and action plans
Bit #
Error code
Error description
Suggested action
0
CO
2
sensor
Com. error
No ability to communicate
with CO2 sensor module.
Try to restart sensor by power
OFF/ON.
Contact local distributor.
1
CO
2
sensor
CO
2
measure error
CO
2
measurement error.
Try Background calibration (see fig. 4
and 5).
Contact local distributor.
See Note 1!
2
T sensor
T measure error
Temp measurement error.
Try to restart sensor by power
OFF/ON.
Contact local distributor.
3
RH/T sensor
com error
No ability to communicate
with RH/T sensor module.
4
RH/T sensor
RH measure error
RH measurement error.
5
RH/T sensor
T measure error
Temp measurement error,
sensor will use CO
2
sensor
temperature if RH/T
Temperature is unavailable.
S_Temp will be set to
NTC_Temp.
6
7
8
Output config. error Error in output configuration.
Output is still updated,
i.e. can be 0-10V
Check connections and loads of
outputs.
Check detailed settings and
configuration with UIP software version
5 or later.
Contact local distributor.
Table 2: Error codes and action plans.
NOTE!
Occurs if probe is out of range, at very high CO2 values. Error code resets automatically when
measured values returns to normal. May also indicate need of zero point calibration. If CO2
values are
normal and error code remains, the sensor can be defect or the connections to it are broken
.
If several errors are detected at the same time, different error code numbers will be added together
into one single error code!
Sensor accuracy is defined at continuous operation (at least three (3) weeks after installation).
Maintenance
tSENSE VAV No Disp
is maintenance free. Internal self-adjusting calibration function
takes care of normal long term drift. To secure highest accuracy, a time interval of
five years is recommended between CO
2
calibrations, unless some special situations
have occurred.
Software can be downloaded free at
www.senseair.com
.
USB-cable and zero calibration kit can be ordered from SenseAir.
Check can be done on site without interfering with ventilation system.
