AQS 51/61 CO2 / TEMPERATURE SENSOR WITH BUILT-IN CONTROLLER
EN1B-0189GE51 R0102
7
Bit #
Error code
Error description
Suggested action
0
N/A
Fatal error: The yellow LED flashes con-
tinuously. The push buttons do not function.
Try to restart the sensor by turning the power off and
on again. Contact local distributor.
1
2
Reserved
2
4
Âlgorithm error: An incorrect EEPROM
configuration is indicated.
Try to restart the sensor by turning the power off and
on again. Check detailed settings and configuration
with AQS-USP software version 4.0 and higher.
Contact local distributor.
3
8
Output error: Detected errors during output
signal calculation and generation.
Check connections and output loads. Check detailed
status of outputs with AQS-USP software version 4.0
and higher.
4
16
Self diagnosis error: May indicate the need of
zero-point calibration or sensor replacement.
Check detailed self-diagnostic status with AQS-USP
software version 4.0 and higher. Contact local
distributor.
6
64
Memory error: Non-fatal error during memory
operations.
Check detailed settings and configuration with AQS-
USP software version 4.0 and higher.
7
128
Warm-up state: Is always set after power-up or
power failure. Resets after restart sequence.
If it doesn't disappear within 30 seconds, check power
stability.
NOTE:
One of the probes is out of range. Occurs, for instance, during over-exposure of the CO
2
sensor, in which case the
error code will automatically reset when the measurement values return to normal. Could also indicate the need of
zero-point calibration. A background calibration using push button function ”bCAL” will remedy this error (a more exact
zero-point calibration using ”CAL” may be performed later, if required). If the CO
2
readings are normal but the error
code remains, the temperature sensor might be broken.
REMARK:
If several errors are detected at the same time, the different error code numbers will be added together into one single
error code.
Maintenance
Basically speaking, the AQS51/61 is maintenance-free. An
internal self-adjusting calibration function takes care of
normal long-term drift associated with the CO
2
sensor. To
ensure the highest accuracy, a time interval of max. five
years is recommended between CO
2
calibrations unless
some special situations have occurred. A zero-point
calibration can be performed using the push button functions
(for AQS61), or for a complete overview, by using a PC
together with the
AQS-USPxx software version 4.0
(or
higher). This software and a special RS232-cable are
included in the
AQS-F0005
service kit
.
The cable is to be
connected to the UART port slide connector (see Fig.9). For
changing control parameters and re-calibration (CO
2
and
temperature), this PC tool must to be used. The check can
be done on site without interfering with the ventilation system.
If, for some reason, the printed circuit board (PCB) needs to
be removed, special precautions must be taken in order to
avoid damaging the temperature probe. When putting the
PCB back into the protective housing, the temperature probe
must be gently positioned in the small probe compartment
(see Fig. 8)!
Limited Warranty
This product has been accurately tested and examined for
proper operation. Please operate this product only in
accordance with the instructions.
The warranty period of the product against defects in work-
manship and material is one year from date of purchase by
the original owner. If the product should become defective
within this warranty period, the customer owns the right for
repair or exchange the product free of charge. Please contact
your retailer for further information.
The retailer is not responsible for any consequential loss or
damages, which may occur by reason of purchase and use
of this product. The warranty is, in any event, strictly limited
to the replacement/repair of the product.
This product is in accordance with the EMC Directive
89/336/EEC and the Low-Voltage Directive 73/23/EEC,
including amendments by the CE-marking Directive
93/68/EEC.
This product fulfills the following requirements:
•
EN50081-1
•
EN55011(B)
•
EN50082-2
•
EN61000-4-2.-3.-4.-5. Level 3
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