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Section 9 Troubleshooting of System Fault, Warning and
Notification Events
9.1 BioTector Fault Event Explanation and Remedial Action
The following fault conditions activate the BioTector stop sequence, set all 4-20mA signals to the FAULT
LEVEL (1mA by default) programmed in the 4-20mA Program menu, and activate the FAULT relay. When the
system fault is rectified, acknowledge the fault by pressing the ENTER key in the Fault Archive menu. Faults
must be acknowledged in the Fault Archive menu to be able to restart the BioTector. If there are multiple
faults in the system, check the fuses on the Relay PCB and the Signal PCB.
Detailed information on system operation, commissioning & startup, service and Process Tests are available
in the MMC/SD card shipped with the BioTector. It is recommended to review these documents for
troubleshooting purposes.
MFC oxygen flow through the Exhaust
“EX” Valve (MV1) has been below
50% of its setpoint for the time longer
than the “LOW O2 FLOW TIME”
defined in Fault Setup menu.
Various, for example,
oxygen supply problem, oxygen
pressure should be ~400mbar.
See Section 8.1.6 Oxygen
Controller Status for details.
Blocked ozone destructor.
Blocked tube after MFC.
Faulty/blocked Exhaust Valve.
Faulty MFC.
Run Flow Test (see Section
8.1.1.2 Flow Test for details).
MFC oxygen flow through the Sample
Out “SO” Valve (MV5) has been below
50% of its setpoint for the time longer
than the “LOW O2 FLOW TIME”
defined in Fault Setup menu.
Various, for example,
oxygen supply problem, oxygen
pressure should be ~400mbar.
See Section 8.1.6 Oxygen
Controller Status for details.
Faulty/blocked Sample Out
Valve.
Blocked tube after MFC.
Faulty MFC.
Run Flow Test (see Section
8.1.1.2 Flow Test for details).
MFC oxygen flow through the Exhaust
Valve (MV5) has been above 50% of
its setpoint for the time longer than the
“HIGH O2 FLOW TIME” defined in the
Fault Setup menu.
Faulty MFC.
Check oxygen pressure, it should
be ~400mbar. See Section 8.1.6
Oxygen Controller Status
for details.
04_NO REACTION
(can also be programmed as a
warning condition)
No TOC (or TC) CO
2
peak detected or
the CO
2
peak is below the “CO2
LEVEL” for 3 consecutive reactions.
See Section 8.3.6 Reaction
Check for details.
Acid/Base containers are empty.
Acid/Base tube rail installed
incorrectly.
Acid/Base Pumps are faulty.
Delivery problem or air bubbles in
Acid/Base lines.
Mixer Reactor is not mixing.
Acid/Base reagents are at
incorrect strength.
Run pH Test (see Section 8.1.1.5
pH Test for details).
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