Thermo Scientific 42iQTL, Instruction Manual

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Troubleshooting
Troubleshooting Guide
Thermo Scientific 42iQTL Instruction Manual 6-5
Problem Possible Cause Action
Alarm – NO Bkg Check
Offset 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 – NO Span Check
Offset 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 – Ambient
Thermistor Defective
Flow/Pressure board Replace defective DMC board as
needed.
Alarm – Chamber Pressure Defective
Flow/Pressure board Replace defective DMC board as
needed.
Alarm – Bench
Temperature Short Cable connection Check the cable connection from
the heater to the DMC board.
Broken wire Verify the wires are properly
connected to both sides of the
heater.
Defective heater Replace heater as needed.
Defective DMC board Replace defective DMC board as
needed.
Alarm – Bench
Temperature Open Cable connection Check the cable connection from
the heater to the DMC board.
Broken wire Verify the wires are properly
connected to both sides of the
heater.
Defective heater Replace heater as needed.
Defective DMC board Replace defective DMC board as
needed.
Alarm – Cooler Current too
Low Defective cooler Replace cooler as needed.
Defective DMC board Replace DMC board as needed.
Alarm – Cooler Current too
High Defective cooler Replace cooler as needed.
Defective DMC board Replace DMC board as needed.
Alarm – Cooler Voltage too
Low Defective cooler Replace cooler as needed.
Defective DMC board Replace DMC board as needed.
Alarm – Cooler Voltage too
High Defective cooler Replace cooler as needed.