SECTION 5: TROUBLESHOOTING GUIDE
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EPI800 Manual.doc
EPI 800 MANUAL
2001 Vision Microsystems Inc.
EGT / CHT PROBE TROUBLESHOOTING GUIDE
EGT / CHT probes are thermocouple devices and typically are
exposed to very hostile environments. Our experience shows that
the most common cause of problems is a terminal connection that
has come loose. However, if the probe is in fact faulty, it cannot be
repaired and the probe will need to be replaced.
The system checks for an open probe when the system is first
turned on. A probe that does not pass the checks is displayed as a
blank bargraph(s) on the system.
If a probe becomes intermittent or fails in-flight, the reading may
appear as a random fluctuation in temperature, which may climb
very high or dip very low. If this occurs, you can re-cycle power
and the system will attempt to recheck the probes. Note that probe
problems often begin as intermittent and can be elusive! If the
problem is constant, you have the best chance of identifying the
errant probe(s), otherwise it may take some trial and error
troubleshooting.