Appendix C: ERROR CODES & TROUBLESHOOTING (Continued)
Problem
Possible Cause
Corrective Action
Efficiency reading incorrect
NET efficiency selected.
Ambient temperature probe
not plugged in to T2.
Incorrect fuel selected.
Select GROSS efficiency.
See page 17.
Plug ambient probe into T2.
See page 11.
Select the proper fuel for the
equipment being tested. See
page 8.
Readings are erratic when
working on oil fired equip-
ment.
A773 oil filter not installed or
installed incorrectly.
Make sure the optional oil fil-
ter (A773) is installed. See
Appendix B.
One or all of the following
parameters; Ratio, CO air
free, excess air, and efficien-
cy read and print dashes.
Measured values are such
that the calculated values of
these parameters are out of
range.
Redo combustion test. Since
these are calculated values,
the measure values must be
within certain levels for these
to display. If the measured
oxygen level is above 19.9%
these parameters won’t
read.
These parameters might not
display or be applicable in
some tests.
Analyzer won’t turn off
Oxygen and/or carbon
monoxide levels outside lim-
its.
Allow the analyzer to purge
longer.
38
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