Appendix C: ERROR CODES & TROUBLESHOOTING
The 709 analyzer will display certain codes to let you know of a malfunction.
*Sensor replacement requires calibration gas.
Code
Displayed
Code Definition
Possible Causes
Corrective Action
Flo
Err
Pump not drawing sample at
correct flow rate.
Blockage / kink in flue probe
hose.
Dirty or blocked filter(s).
Worn pump.
Check and rectify. See
Appendix A.
Replace filter(s). See
Appendix A.
Return to TPI for service.
InIt
O2
Err
Oxygen sensor failed to ini-
tialize
Flue probe connected to 709
prior to power up.
709 did not purge completely
from last sample.
Worn or defective oxygen
sensor.
Disconnect probe and
restart.
Purge for 20 minutes and
restart.
Return to TPI for sensor
replacement or install new
sensor.*
Try manually initializing the
sensor. See Appendix E.
InIt
CO
Err
Carbon monoxide sensor
failed to initialize.
Flue probe connected to 709
prior to power up.
709 did not purge completely
from last sample.
Worn or defective carbon
monoxide sensor.
Disconnect probe and
restart.
Purge for 20 minutes and
restart.
Return to TPI for sensor
replacement or install new
sensor.*
Try manually initializing the
sensor. See Appendix E.
Lo
bat
Low battery.
Batteries needs to be
changed.
Charge batteries. (See
Appendix J.
oFL
Overflow indication. The
pressure being measured is
outside the maximum mea-
surement capability.
Pressure being measured is
too high or low.
Pressure sensor damaged or
defective.
Remove pressure source.
Return to TPI for service.
oFL
Overflow indication. The tem-
perature being measured is
outside the maximum mea-
surement capability.
Temperature being measured
is too high or low.
Remove pressure source.
oPEn
Unable to read thermocouple
(temperature).
Temperature probe not con-
nected to input.
Worn temperature sensor.
Connect temperature probe
to analyzer.
Replace temperature probe
or flue probe.
CAL
DUE
Err
Annual calibration is due.
Last calibration was per-
formed over one year ago.
The analyzer will perform
properly after this message
displays but should be
returned to TPI when pos-
sible for annual calibration.
Appendix B:
A773 SULFUR FILTER INSTALLATION & MAINTENANCE
4. Beginning on the “Flue Probe” side of the A773 sulfur filter, pull the yellow
thermocouple cord out of the channel of the flue probe tube. Pull out approx-
imately the length of the water trap that was removed.
5. Being careful not to cut the yellow cord, cut out a section of the flue probe
tubing the length of the water trap on the “Flue Probe” side of the A773 sul-
fur filter. (See picture below)
6. Install the water trap in the flue probe hose where the piece was cut out. Make
sure the water trap is positioned correctly. The water trap lid should face the
“Hose End” side of the hose.
A773 SULFUR FILTER MAINTENANCE:
The A773 should be replaced when most of the pellets become discolored, usual-
ly white or black.
If the A773 begins to trap condensate and fill with water but the pellets are not
discolored to the point replacement is required, it should be removed and allowed
to dry. Once it is dry it can be reused.
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