ABL77 Service Manual Chapter 3: Troubleshooting
Reference Table
Introduction
This table offers a convenient reference to problems, their causes and the
recommended corrective action.
The most frequent cause for each problem is listed first followed by less frequent
causes.
Problem Probable Cause Corrective Action
Calibration Failure – this also
includes failed initializations.
The important first step is to
identify whether the failure is
due to a sensor failure or failure
of the analyzer's fluidic system
to properly transport the
calibration fluid to the sensor
cassette measuring chamber.
Fluidic system blockage in
analyzer. This prevents fresh
calibration solution from
reaching the sensor array or
combines fresh cal solution with
air.
Proceed to Chapter 4, Test and
Calibration Procedures to
investigate the fluidics system
using the Hardware screen and
the Calibration Lines procedure
Follow the instructions on the
analyzer screen to help identify
the underlying cause.
Sensor failure Inactivate the failed parameter
or replace the SCi.
Calibration, Initialization, or
QC failures with multiple sensor
cassettes over time
Valve board – worn or corroded
pin receptacle
Replace the valve board.
Proceed to Chapter 5
Dismantling.
Valve board – component
failure
Replace the valve board.
Proceed to Chapter 5
Dismantling.
Analog board – component
failure
Replace the analog board.
Proceed to Chapter 5
Dismantling.
Zero calibration failure Check analyzer connector for
corrosion or wear. If OK,
proceed to Chapter 4, Test and
Calibration Procedures to set
the electronic zero of the sensor
channels.
Valve board - single valve
failure
Proceed to Chapter 4, Test and
Calibration Procedures to test
the valves on the valve board. If
a valve is malfunctioning,
replace it. See Chapter 6
Replacements.
Continued on next page
3-9
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