Thermo Scientific 48iQ Instruction Manual page 182

Troubleshooting
Troubleshooting Guide
6-4 48iQ Instruction Manual
Problem
Alarm – 5V/24V Step Board
Alarm – Conc.
Alarm – Analog I/O
Alarm – Digital I/O
Alarm – Auto Bkg Cal/Check
Alarm – Auto Span
Cal/Check
Alarm – Bench Temp
Thermistor Open
Alarm – Bench Temp
Thermistor Short
Alarm – Motor Speed too
low
Alarm – Motor Speed too
high
Alarm – Module Thermistor
Open
Alarm – Module Thermistor
Short
Alarm – Bench Temp
Thermistor Open
Possible Cause Action
Defective DMC PCB Replace DMC board.
Cable connection Check the cable connections to that
Step POL board.
Concentration has Check to ensure range corresponds
exceeded range limit 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.
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
Cable connection Check connection from heater to
DMC board. Reseat if needed.
Cable connection Check connection from heater to
DMC board. Reseat if needed.
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.
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.
Defective DMC board Replace board as needed.
Defective DMC board Replace board as needed.
Cable connection Check the cable connection from the
thermistor to the DMC board.
Thermo Scientific