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Troubleshooting
Troubleshooting Guide
6-8
43iQHL Instruction Manual
Thermo Scientific
Problem
Possible Cause
Action
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.
Alarm – Instrument
Temperature
Fan failure
Replace fan if not operating
properly.
Dirty fan filter
Clean or replace filter.
Overheating PCB
Locate defective PCB reporting the
error and replace if needed.
Alarm – Analog I/O
Defective PCB
Replace Analog board.
Alarm – Digital I/O
Defective PCB
Replace Digital board.
Alarm – Auto Bkg
Cal/Check
Incorrect high alarm
limit
Verify the high limit is correct via
Settings>Status and
Alarms>Concentrations screen.
Instrument background
calibration failed
Recalibrate the instrument.
Alarm – Auto Span
Cal/Check
Incorrect high alarm
limit
Verify the high limit is correct via
Settings>Status and
Alarms>Concentrations screen.
Instrument span
calibration failed
Recalibrate the instrument.
Summary of Contents for 43iQHL
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