Hach BioTector B3500s User Manual page 148

112_LO TEMP STANDBY
113_TEMP SENSOR FAULT
114_I/O WARNING
115_CO2 ANALYZER
WARN
BioTector temperature has dropped
below 2°C for longer than 2 minutes.
BioTector has been automatically put
into standby mode and has stopped
analyzing.
When BioTector temperature increases
above 5°C for longer than 2 minutes,
BioTector continues normal operation.
The difference between the
temperature readings recorded by
Micro Processor Unit (MPU)
temperature sensor (located on the
Motherboard) and the BioTector
temperature sensor (located on the O2-
Controller Board) has been outside the
±15°C temperature band.
System has detected changes in the
Input/Output bus extender chips, which
have read/write control registers, during
the periodic checks carried out
automatically.
Fault in CO Analyzer.
2
Very dirty optics in CO
2
Check ambient and BioTector
temperature.
Confirm BioTector is operating
within its specification
temperatures (5°C – 45°C).
Confirm that motherboard cover is
installed and the door of the
analyzer is closed.
Check ambient temperature,
which should be less than 45°C.
Confirm that the Analyzer is not
exposed to direct sun light.
If the problem is not related to
above, contact the distributor or
the manufacturer.
When system detects a
discrepancy between the
requested and the read
configuration registers values,
then all devices on SPI "Serial
Peripheral Interface" bus are reset
and re-initialized automatically.
Acknowledge the warning and
inform the distributor or the
manufacturer.
Check CO
Analyzer. response in Simulate menu (see
Section
details).
Open CO
optics.
Power down and power up the
BioTector.
If problem persists, check
outgoing 24V DC power to CO
analyzer on Motherboard at wires
N11 and N12.
For further tests, see information
sheet "T019. BioTector CO
Troubleshooting", which is available in
the MMC/SD card shipped with the
BioTector.
analyzer's ppm CO
2
8.1.2 Simulate for
analyzer and clean the
2
2
Analyzer
2
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