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Troubleshooting
Troubleshooting Guide
6-2
42iQTL Instruction Manual
Problem
Solenoid current out of
range (option)
No output signal (or very
low output)
No output signal
Calibration drift
Excessive noise
Non-linear response
Possible Cause
Action
Micro SD Card
If Micro SD card was just replaced,
Programming
re-install the old one. If the
problem is fixed, request a
replacement Micro SD card.
Sticking or damaged
Reset solenoid via Settings>Health
solenoid
Check>Status and Alarms>Valve
and Pump Resets screen. If
damaged, replace solenoid valve
block.
No sample gas reaching
Check input sample flow.
the analyzer
Ruptured pump
Rebuild pump head.
diaphragm
Blocked sample
Unplug power cord. Clean or
capillary
replace capillary.
No ozone reaching the
Check the "Configuration" menu to
reaction chamber
see if the ozonator is ON. If it is
ON, check dry air supply.
Disconnected or
Unplug power cord. Check that
defective input or high
cables are connected properly.
voltage supply
Check cable resistance.
Analyzer not calibrated
Recalibrate.
Defective ±12 volt
Check supply voltages in Status
and Alarms>Reaction Chamber
screen
Dryer to ozonator
Replace.
depleted
Line voltage
Check to see if line voltage is
fluctuations
within specifications.
Defective pump
Rebuild pump.
Unstable NO or NO
Replace.
2
source
Clogged capillaries
Unplug power cord. Clean or
replace capillary.
Clogged sample air
Replace filter element.
filter
Defective or low
Unplug power cord. Remove PMT.
sensitivity PMT
Install known good PMT. Plug in
power cord. Check performance.
Check temperature (less than -2 °C
Defective cooler
at T
Incorrect calibration
Verify accuracy of multipoint
source
calibration source gas.
= 25 °C).
amb
Thermo Scientific
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