Thermo Scientific 42iQHL Instruction Manual page 205

Thermo Scientific
Problem
Alarm – Analog I/O
Alarm – Digital I/O
Alarm – NO Bkg Check
Offset
Alarm – NO Span Check
Offset
Alarm – Ambient
Thermistor
Alarm – Chamber Pressure
Alarm – Bench
Temperature Short
Alarm – Bench
Temperature Open
Alarm – Cooler Current too
Low
Alarm – Cooler Current too
High
Alarm – Cooler Voltage too
Low
Possible Cause Action
Defective PCB Replace Analog board.
Defective PCB Replace Digital board.
Incorrect high alarm limit Verify the high limit is correct via
Settings>Status and
Alarms>Concentrations screen.
Instrument background Recalibrate the instrument.
calibration failed
Incorrect high alarm limit Verify the high limit is correct via
Settings>Status and
Alarms>Concentrations screen.
Instrument span Recalibrate the instrument.
calibration failed
Defective Flow/Pressure Replace defective DMC board as
board needed.
Defective Flow/Pressure Replace defective DMC board as
board needed.
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.
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.
Defective cooler Replace cooler as needed.
Defective DMC board Replace DMC board as needed.
Defective cooler Replace cooler as needed.
Defective DMC board Replace DMC board as needed.
Defective cooler Replace cooler as needed.
Defective DMC board Replace DMC board as needed.
Troubleshooting
Troubleshooting Guide
42iQHL Instruction Manual 6-5