H. Maintaining and Troubleshooting the AQSync
Model AQSync Air Quality Monitoring Station Manual Rev. A-1
50
Air pump is not drawing
sufficient flow.
Air flow should be greater
than 1.4 L/min. If flow is
lower, check for leaks. If
there are no leaks, replace air
pump.
Instrument has a large
offset
Internal heated NO
2
scrubber
is exhausted or contaminated.
Contact 2B Technologies
about replacement of the
internal heated NO
2
scrubber.
Instrument always reads
close to zero for NO
2
concentrations.
Solenoid valve cable is not
properly connected to circuit
board.
Internal heated NO
2
scrubber
is exhausted or contaminated.
Reattach solenoid valve
cable to circuit board.
Contact 2B Technologies
about replacement of the
internal heated NO
2
scrubber.
Table H.4. Error Codes of the NO
2
/NO/NO
x
Module
The following tables list the hexadecimal codes and their corresponding error
definitions. The first table lists the errors if there were only one error, while the second
table lists all of the possible error combinations with their definitions.
Single Errors
Error byte
Definition
00
No errors
08
Scrubber temp out of range. Temp is either > 113 degrees or < 110.
80
Pressure control out of range by > 1 mbar
04
Cell flow out of range (< 1200 or >1600)
40
Ozone flow out of range (<30 or >110)
02
Cell voltage out of range (<0.1V or >2.4V)
20
Ozone Generator voltage out of range (< 0.01V or >2.4V)
Combination Errors
Error Byte
Definition
0A
Scrubber Temp and Cell Voltage
0C
Scrubber Temp and Cell Flow
0E
Scrubber Temp, Cell Flow, and Cell Voltage
22
Cell Voltage, and Ozone Generator Voltage
26
Cell Flow, Cell Voltage, and Ozone Generator Voltage
28
Scrubber Temp and Cell Voltage
24
Cell Flow and Cell Voltage
2A
Scrubber Temp, Cell Voltage, and Ozone Generator Voltage
2C
Scrubber Temp, Cell Flow, and Ozone Generator Voltage