Hach BioTector B7000 User Manual page 145

WARNING
76_DCP WARN
77_DCP N SIG WARN
78_DCP N REF WARN
81_ATM PRESSURE HIGH
82_ATM PRESSURE LOW
83_SERVICE TIME
84_SAMPLER ERROR
114_I/O WARNING
CONDITION
A problem has been found during
communication with the Dual Cell
Photometer (DCP) module.
The DCP communication is lost.
Nitrogen SIGNAL/REFERENCE
channel readings on DI Water is
outside the default factory band.
System atmospheric pressure sensor
reading is above 115kPa. Therefore,
the sensor reading is defaulted to
101.3kPa fault operation mode.
System atmospheric pressure sensor
reading is below 60kPa. Therefore, the
sensor reading is defaulted to
101.3kPa fault operation mode.
The service counter has counted down
the days between service intervals and
indicates that service is required.
Warning generated on the BioTector
sampler due to no/low sample or low
air pressure/vacuum in the sampler.
System has detected changes in the
Input/Output bus extender MCP23S17
chips, which have read/write control
registers, during the periodic checks
carried out automatically.
CAUSE/REMEDY
Check the power on the DCP
module. LEDs on DCP PCB
should be on.
Check the DCP data cable
connections.
Check DI Water and confirm it is
clean.
Check the operation of Xenon
Lamp.
Clean the TN measuring cell.
Check the coaxial cables on the
DCP module.
Check the SIGNAL/REFERENCE
readings by running the "READ
DIW REF TEST" in Process Test
menu.
Check ADC[8] in Analog Input
menu, which should be ~4 Volts.
Faulty pressure sensor. Replace
the motherboard.
Check ADC[8] in Analog Input
menu, which should be ~4 Volts.
Faulty pressure sensor. Replace
the motherboard.
Service the BioTector.
After service, acknowledge the
warning by resetting the counter
using the "RESET SERVICE
COUNTER" function in
Diagnostics, Service menu.
Check the LCD screen of the
sampler for details. See sampler
user manual.
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.
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