Thermo Scientific 43iQTL Instruction Manual page 180

Troubleshooting
Troubleshooting Guide
6-8 43iQTL Instruction Manual
Problem
Other alarm
Defective DMC PCB
Alarm – 5V/24V Step Cable connection
Board
Alarm – Instrument Fan failure
Temperature
Dirty fan filter
Overheating PCB
Alarm – Analog I/O Defective PCB
Alarm – Digital I/O Defective PCB
Alarm – Auto Bkg Incorrect high alarm
Cal/Check limit
Instrument background
calibration failed
Alarm – Auto Span Incorrect high alarm
Cal/Check limit
Instrument span
calibration failed
Possible Cause
Make sure the instrument temperature
is not too high or in alarm.
Replace DMC board.
Check the cable connections to that
Step POL board.
Replace fan if not operating properly.
Clean or replace filter.
Locate defective PCB reporting the error
and replace if needed.
Replace Analog board.
Replace Digital board.
Verify the high limit is correct via
Settings>Status and
Alarms>Concentrations screen.
Recalibrate the instrument.
Verify the high limit is correct via
Settings>Status and
Alarms>Concentrations screen.
Recalibrate the instrument.
Action
Thermo Scientific