Thermo Scientific 42iQ Instruction Manual page 205

Thermo Scientific
Problem
Alarm – Module
Temperature
Alarm – 5V/24V Step Board
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
Possible Cause Action
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.
Cable connection Check the cable connections to that
Step POL board.
Defective PCB Replace Analog board.
Defective PCB Replace Digital board.
Incorrect high alarm Verify the high limit is correct via
limit Settings>Status and
Alarms>Concentrations screen.
Instrument Recalibrate the instrument.
background
calibration failed
Incorrect high alarm Verify the high limit is correct via
limit Settings>Status and
Alarms>Concentrations screen.
Instrument span Recalibrate the instrument.
calibration failed
Defective Replace defective DMC board as
Flow/Pressure board needed.
Defective Replace defective DMC board as
Flow/Pressure 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.
Troubleshooting
Troubleshooting Guide
42iQ Instruction Manual 6-5