Hach BioTector B7000 User Manual page 139

FAULT
08_RELAY PCB FAULT
09_OZONE PCB FAULT
10_NP PCB FAULT
11_CO2 ANALYZER FAULT
12_HIGH CO2 IN O2
13_SMPL VALVE SEN SEQ
14_SAMPLE VALVE SEN1
15_SAMPLE VALVE SEN2
16_SAMPLE VALVE SEN3
17_SMPL VALVE NOT
SYNC
CONDITION
Fuse blown in the 81204001 Relay
PCB. Fuse F3 blown in the 81204010
Signal PCB. 24V PSU faulty.
Faulty Ozone PCB.
24V PSU faulty.
Fuse F2, F4 or F6 blown in the
Nitrogen Phosphorus Input/Output PCB
(NP I/O PCB 81204290).
Fault in CO Analyzer.
2
High level of CO has been detected in
2
the input O gas.
2
Sample Valve sensors have been
registered in a wrong sequence other
than the Sensor 1, 2 and 3 sequence.
Sample Valve Sensor 1, 2 or 3 did not
register the position of the valve.
Correct sensor position (Sensor 1) has
not been detected in Sample Valve
when Sample Pump is running.
CAUSE/REMEDY
Check the incoming 24V DC
power. Check the fuses on the
Relay PCB. Check the fuse F3 on
the Signal PCB. LED 6 on the
Signal PCB should be off when
the fault has been corrected.
Inform the distributor or the
manufacturer.
Replace the Ozone PCB.
Check the incoming 24V DC
power to the board.
Check the fuses F2, F4 and F6 on
the NP I/O PCB (81204290). LED
L1, L4 and L6 should be off when
the fault is cleared.
Check incoming 24V DC power to
CO analyzer.
2
Check signal from CO
2
Check the O gas input and
2
oxygen concentrator if fitted.
Check CO Analyzer zero level
2
and CO Analyzer filter.
2
Sample Valve wiring is not
correct. Check valve sensor
wiring.
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.
Replace the valve assembly.
Change Relay 4 on the Relay
PCB. Check sensor signal looking
at LED 12 on Signal PCB and
DI01 in Digital Input menu.
Replace the valve assembly.
analyzer.
Page 139