Thermo Scientific 43iQ, Instruction Manual

Page: 172 / 284

Troubleshooting
Troubleshooting Guide
6-2 43iQ Instruction Manual Thermo Scientific
Problem Possible Cause Action
on front panel are on)
Micro SD Card
Programming If Micro SD card was just
replaced, re-install the old one.
If the problem is fixed, request
a replacement Micro SD card.
Solenoid current out of
range (option) Sticking or damaged
solenoid Reset solenoid via
Settings>Health Check>Status
and Alarms>Valve and Pump
Resets screen. If damaged,
replace solenoid valve block.
Pump current out of range Damaged or dirty pump Reset pump via
Settings>Health Check>Status
and Alarms>Valve and Pump
Resets. Inspect and refurbish
pump. If pump motor is
damaged, replace pump.
Cannot zero instrument or
there is a high background
signal when sampling zero
air. (Zero air should produce
a reading equivalent to less
than 15 ppb SO
2
.)
Zero air system is faulty,
needs new SO
2
scrubbers or
requires maintenance.
Test against an ultra-zero
cylinder from a reputable
scientific gas supplier or check
effect of a new
chromatography grade
activated charcoal scrubber
installed at the instrument
inlet.
Zero air flow rate is
inadequate Check by-pass or atmospheric
pressure vent to verify that the
zero air system is providing
more flow than the instrument
is drawing.
Instrument is not drawing in
zero air Check the sample flow and
pressure in the Settings>Health
Check>Status and Alarms>Flow
and Pressure screen.
Use an independent flow meter
to check flows at the sample
inlet and exhaust bulkheads
(they should match).
Perform a leak test as
described on page
5-5 .
Span gas containing SO
2
,
NO or hydrocarbon is
contaminating system
Verify that span gases
connected to the calibration
system are shut off and leak-
tight.
Internal or external lines,
filters and other sample
handling equipment are
contaminated or dirty Replace inlet filter (if installed)
and as much as possible.