Thermo Scientific 43iQ, Instruction Manual

Page: 177 / 284

Troubleshooting
Troubleshooting Guide
Thermo Scientific 43iQ Instruction Manual 6-7
Problem Possible Cause Action
full-scale value or below
zero under range on the analog
outputs is provided. If this is
not desirable due to system
restrictions, it may be turned
off in the
Settings>Communications>Ana
log I/O screen.
Recorder is drawing down
output Verify that the recorder or data
logger input impedance meets
minimum requirements.
Flow meter fluctuations Dirty pump diaphragm Clean or replace pump
diaphragm.
Capillary blocked Clean or replace capillary.
Clogged PTFE line Inspect all sample lines.
Alarm – Chamber
Temperature Heater failed Replace heaters as needed.
Defective PCB Replace PCB.
Alarm – Perm Gas Temp Incorrect Perm oven set
temperature or alarm
setting Check that the alarm settings
match the set temperature.
Perm oven heater
thermistor or gas thermistor
error Replace thermistor.
Perm oven failure Replace the Perm oven.
Alarm – Pressure High pressure indication Check plumbing for leaks.
Check the pump for a tear in
the diaphragm. Replace if
needed.
Check that the capillary is
properly installed and o-rings
are in good shape.
Alarm – Flow Flow low Check sample capillary for
blockage. Replace as
necessary.
If using sample particulate
filter, make sure it is not
blocked. Disconnect sample
particulate filter from the
sample bulkhead. If flow
increases, replace the filter.
Perform a leak test as decribed
on page
5-5 .
Flow high When delivering zero air or gas
to the instrument, use an