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Troubleshooting
Troubleshooting Guide
6-8
43iQ Instruction Manual
Problem
Alarm – Intensity
Alarm – Lamp voltage
Alarm – SO
Conc.
2
Alarm – Board
Communication
Alarm – Power Supply
Alarm – Module
Temperature
Alarm – 5V/24V Step Board
Possible Cause
Flow = 0 LPM
Worn Diaphragm
Low – Lamp is failing
Low voltage (<750v)
High voltage (>1200v)
Concentration has
exceeded range limit
Concentration low
Cable connection
Defective DMC PCB
Cable connection
Defective component
Defective DMC PCB
Cable connection
Other alarm
Defective DMC PCB
Cable connection
Action
atmospheric dump.
Check that Step POL board #1
has both dip switch settings of
SW2 off (both facing the rear of
the instrument). Verify the
pump is plugged into the Step
POL board.
Rebuild pump every 12 months
or as needed.
Check that the lamp and trigger
pack are securely fastened.
Replace lamp.
Replace lamp power supply.
Replace flash lamp.
Check to ensure range
corresponds with expected
value. If not, select proper
range.
Check user-defined low set
point. Be sure the minimum
trigger is set as desired.
Check that DMC cable is
connected properly. Reseat if
needed.
Replace DMC board.
Check that DMC cable is
connected properly. Reseat if
needed.
Check for other alarms, as it is
possible that another
component of that DMC is
drawing too much current.
Replace DMC board.
Check that DMC cable is
connected properly. Reseat if
needed.
Make sure the instrument
temperature is not too high or
in alarm.
Replace DMC board.
Check the cable connections to
that Step POL board.
Thermo Scientific
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