Troubleshooting - TESTO 325M Instruction Manual

If defects not described here should occur,
Service. You will find contact details in the Warranty booklet or in Internet at www.testo.com .
Defects when switching on:
Defect
Analyser cannot
be switched on
flashes and
zeroing starts
again
flashes and
zeroing
starts again
O flashes and
2
zeroing starts
again
CO flashes and
zeroing starts
again
Error
and an
error number
are displayed
Possible causes
Spent rechargeable
batteries/batteries
Operating temperature
too high or too low
Flue gas temperature
probe not attached or
incorrectly attached
-or-
Thermocouple of flue
gas temperature probe
defective
O value too low because
2
flue gas probe pipe is
in flue gas duct
Flue gas probe pipe
in flue gas duct
-or-
CO value not
stable
Various
please contact your distributor or Testo Customer
Remedy
Change rechargeable batteries/batteries (See Chapter 8.1,
P. 23) or connect mains unit (accessory)
Analyser should be brought into permissible operating
temperature range
Connect flue gas temperature probe
or check connection
Change thermocouple
(See Chapter 8.6 Changing thermocouple, P. 25)
Expose probe to fresh air and run zeroing phase again.
If not successful: O
to be changed (See 8.8 Changing measuring cells, P.26)
Expose probe to fresh air and run through
zeroing phase.
If not successful: C0 / CO/H
and has to be changed (See 8.8 Changing measuring cells,
P. 26)
Switch off analyser and contact Testo Customer
Service Department or contact your nearest dealer

9. Troubleshooting

measuring cell is defect and has
2
measuring cell is defect and
2
29