Thermo Scientific 42iQHL Instruction Manual page 203

Thermo Scientific
Problem
Non-linear response
Excessive response time
Improper converter
operation
Alarm – Instrument
Temperature
Alarm – Bench
Temperature
Alarm – Cooler Temp
Sensor
Alarm – NO Converter
2
Temperature
Alarm – Pressure
Alarm – Flow
Possible Cause Action
Defective cooler Check temperature (less than -2
°C at T
Incorrect calibration Verify accuracy of multipoint
source calibration source gas.
Leak in sample probe line Check for variable dilution.
Partially blocked sample Unplug power cord. Clean or
capillary replace capillary.
Hang up/blockage in Change element.
sample filter
Questionable calibration Verify accuracy.
gas
Converter temperature Temperature should be 625 °C for
too high or too low stainless steel.
Low line voltage Check to see if line voltage is
within specifications.
Fan failure Replace fan if not operating
properly.
Dirty fan filter Clean or replace filter.
Overheating PCB Locate defective PCB reporting
the error and replace if needed.
Heaters failed Replace heaters as needed.
Defective PCB Replace PCB.
Check fan operation Replace defective fan.
Check fan filter Clean or replace filter.
Bad thermistor Replace thermistor.
Converter temperature Stainless steel converter should
low be hot to the touch. If not, the
heater may have failed. Check
that converter temperature
setpoint is approximately 625 °C.
High pressure indication Check plumbing for leaks.
Check the pump for a tear in the
diaphragm.
Replace if needed.
Check the capillary is properly
installed and o-rings are in good
shape.
Flow low Check sample capillary for
blockage. Replace as necessary.
Troubleshooting
Troubleshooting Guide
= 25 °C).
amb
42iQHL Instruction Manual 6-3