GE Moisture Image 1 Series, Service Manual, Page: 45 / 107

Troubleshooting and Maintenance 2-13
June 2003
Screen always
reads the wettest
(highest)) pro-
grammed moisture
calibration value
while displaying
dew/frost point. Probe is saturated. Liquid
water present on sensor
surface and/or across elec-
trical connections. Clean the sensor and the sensor shield as
described in
Aluminum Oxide Probe
Maintenance on page A-7 in Appendix
A. Then reinstall sensor.
Shorted circuit on 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
Sensor is contaminated
with conductive particles
(refer to Appendix A). Clean the sensor and the sensor shield as
described in
Aluminum Oxide Probe
Maintenance on page A-7 in Appendix
A. Then reinstall sensor.
Improper cable
connection. Check the cable connections to both the
probe and the Series 1.
Screen always
reads the driest
(lowest) pro-
grammed mois-
ture calibration
value while dis-
playing dew/frost
point. Open circuit on sensor.
Non-conductive
material is trapped under
contact arm of sensor.
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.
Improper cable
connection. Check the cable connections to both the
probe and the Series 1.
Slow response. Slow outgassing of
system. Replace the system components with
stainless steel or electro-polished stain-
less steel.
Sensor is contaminated
with non-conductive par-
ticles (refer to Appendix
A) 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.
Exception screen Unrecoverable software
error. Contact GE Panametrics.
Table 2-5: Troubleshooting Guide for Common Problems (cont.)
Symptom Possible Cause System Response Action