Hach BioTector B7000i - Page 141

Page 141
11_CO2 ANALYZER FAULT
Fault in CO
2
Analyzer.
Very dirty optics in CO
2
Analyzer.
Check CO
2
analyzer’s ppm CO
2
response in Simulate menu.
Open CO
2
analyzer and clean the
optics.
Power down and power up the
BioTector.
If problem persists, check
outgoing 24V DC power to CO
2
analyzer on Motherboard at wires
101 and 102.
For further tests, see information
sheet “T019. BioTector CO
2
Analyzer
Troubleshooting” supplied in the
MMC/SD card, shipped with the
BioTector.
12_HIGH CO2 IN O2
High level of CO
2
has been detected in
the input oxygen gas.
Go to Simulate menu and read the CO
2
analyzer’s CO
2
ppm value. If this value
is greater than 250-300ppm, check the
oxygen purity.
Check the quality of oxygen
following the Oxygen Purity Test
procedures in Section 7
Analyzer Commissioning
and Startup.
If the oxygen purity test is
satisfactory, open CO
2
analyzer
and clean the optics.
If problem persists, replace the
CO
2
Analyzer filters.
If the oxygen purity test is
unsatisfactory, replace the oxygen
concentrator/bottle.
13_SMPL VALVE SEN SEQ
Sample Valve sensors have been
registered in a wrong sequence other
than the Sensor 1, 2, 3 and 4
sequence. Check if faults
14/15/16/130_Sample Valve
Sen1/2/3/4 below are also registered.
Confirm that the switches “1” and
“2” are both at the “ON” (4
Sensors) position on the Sample
Valve Sensor PCB.
Check fuse F6 on the Relay PCB.
Check that the SAMPLE VALVE is
rotating using the Simulate menu.
Check Sample Valve sensor
wiring.
14_SAMPLE VALVE SEN1
15_SAMPLE VALVE SEN2
16_SAMPLE VALVE SEN3
130_SAMPLE VALVE SEN4
Sample Valve Sensor 1, 2, 3 or 4 did
not register the position of the valve.
Check fuse F6 on the Relay PCB.
Faulty Sample Valve sensors or
orientation problem.
Check the wiring on the valve
PCB and on the Signal PCB.
Check sensor signals looking at
LEDs 12, 13 & 14 on Signal PCB
and DI01, DI02 & DI03 in Digital
Input menu for sensors 1 , 2 and 3
respectively.
Check sensor signals looking at
LEDs 12 and 13 on Signal PCB,
and DI01 and DI02 in Digital Input
menu, both of which are activated
for sensor 4.
Replace the valve assembly.