GE Moisture Image 1 Series Service Manual page 45

Table 2-5: Troubleshooting Guide for Common Problems (cont.)
Symptom Possible Cause
Screen always Probe is saturated. Liquid
reads the wettest water present on sensor
(highest)) pro- surface and/or across elec-
grammed moisture trical connections.
calibration value
while displaying
dew/frost point.
Shorted circuit on sensor.
Sensor is contaminated
with conductive particles
(refer to Appendix A).
Improper cable
connection.
Screen always Open circuit on sensor.
reads the driest
(lowest) pro- Non-conductive
grammed mois- material is trapped under
ture calibration contact arm of sensor.
value while dis-
playing dew/frost
point.
Improper cable
connection.
Slow response. Slow outgassing of
system.
Sensor is contaminated
with non-conductive par-
ticles (refer to Appendix
A)
Exception screen Unrecoverable software
error.
Troubleshooting and Maintenance
System Response
June 2003
Action
Clean the sensor and the sensor shield as
described in Aluminum Oxide Probe
Maintenance on page A-7 in Appendix
A. Then reinstall sensor.
Run "dry gas" over sensor surface. If
high reading persists, then probe is prob-
ably shorted and should be returned to
the factory for evaluation
Clean the sensor and the sensor shield as
described in Aluminum Oxide Probe
Maintenance on page A-7 in Appendix
A. Then reinstall sensor.
Check the cable connections to both the
probe and the Series 1.
Return probe to factory for evaluation.
Clean the sensor and the sensor shield as
described in Aluminum Oxide Probe
Maintenance on page A-7 in Appendix
A. Then reinstall the sensor. If the low
reading persists, return the probe to the
factory for evaluation.
Check the cable connections to both the
probe and the Series 1.
Replace the system components with
stainless steel or electro-polished stain-
less steel.
Clean the sensor and the sensor shield as
described in Aluminum Oxide Probe
Maintenance on page A-7 in Appendix
A. Then reinstall the sensor.
Contact GE Panametrics.
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