Appendix E: ERROR CODES & TROUBLESHOOTING
The 708 analyzer will display certain codes to let you know of a malfunction.
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.
Replace filter(s).
Return to TPI for service.
InIt
O2
Err
Oxygen sensor failed to initialize
Flue probe connected to 708
prior to power up.
708 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 G.
InIt
CO
Err
Carbon monoxide sensor
failed to initialize.
Flue probe connected to 708
prior to power up.
708 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 G.
Lo
bat
Low battery.
Battery needs to be charged.
Charge battery. If the battery
won’t hold a charge, replace
the battery.
oFL
Overflow indication. The carbon monoxide being
mesured is above the instruments capability.
CO being measured is too
high or low.
Remove the CO source and
allow the 708 to purge.
oFL
Overflow indication. The temperature being measured is
outside the maximum measurement capability.
Temperature being measured
is too high or low.
Remove pressure source.
oPEn
Unable to read thermocouple
(temperature).
Temperature probe not connected to input.
Worn temperature sensor.
Connect temperature probe
to analyzer.
Replace temperature probe
or flue probe.
*Sensor replacement requires calibration gas.