Troubleshooting
Troubleshooting Guide
6-4
48iQ Instruction Manual
Thermo Scientific
Problem
Possible Cause
Action
Defective DMC PCB
Replace DMC board.
Alarm – 5V/24V Step Board
Cable connection
Check the cable connections to that
Step POL board.
Alarm – 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 – 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.
Alarm – Bench Temp
Thermistor Open
Cable connection
Check connection from heater to
DMC board. Reseat if needed.
Alarm – Bench Temp
Thermistor Short
Cable connection
Check connection from heater to
DMC board. Reseat if needed.
Alarm – Motor Speed too
low
Cable connection
Check connection from motor to
DMC board. Reseat if needed.
Defective Heater
Replace motor as needed.
Defective DMC board
Replace board as needed.
Alarm – Motor Speed too
high
Cable connection
Check connection from motor to
DMC board. Reseat if needed.
Defective Heater
Replace motor as needed.
Defective DMC board
Replace board as needed.
Alarm – Module Thermistor
Open
Defective DMC board
Replace board as needed.
Alarm – Module Thermistor
Short
Defective DMC board
Replace board as needed.
Alarm – Bench Temp
Thermistor Open
Cable connection
Check the cable connection from the
thermistor to the DMC board.
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Страница 165: ...Calibration Calibration Thermo Scientific 48iQ Instruction Manual 4 11 ...
Страница 174: ...Maintenance Pump Rebuilding 5 4 48iQ Instruction Manual Thermo Scientific Figure 5 2 Pump Rebuilding ...
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Страница 192: ...Servicing Fan Replacement 7 8 48iQ Instruction Manual Thermo Scientific Figure 7 8 Replacing the Fan ...
Страница 220: ...Servicing DMC Optical Bench 7 36 48iQ Instruction Manual Thermo Scientific Figure 7 40 Filter Wheel ...
Страница 230: ...Servicing DMC Optical Bench 7 46 48iQ Instruction Manual Thermo Scientific Figure 7 48 IR Source Cable Disconnect ...
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