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