GE moisture.IQ, User Manual

Page: 109 / 182

moisture.IQ User’s Manual 97
Chapter 8. Troubleshooting
Screen always
reads the
wettest
(highest))
programmed
moisture
calibration
value while
displaying
dew/frost
point. Probe is saturated. Liquid
water present on sensor
surface and/or across
electrical connections. Clean the sensor and the sensor shield as
described in document 916-064
, Basic
Hygrometry Principles Then reinstall sensor.
Shorted circuit on
sensor. Run “dry gas” over sensor surface. If high
reading persists, then probe is probably
shorted and should be returned to the factory
for evaluation
Sensor is contaminated
with conductive particles
(refer to
Basic Hygrometry
Principles .
Clean the sensor and the sensor shield as
described in document 916-064
, Basic
Hygrometry Principles . Then reinstall sensor.
Improper cable
connection. Check the cable connections to both the probe
and the moisture.IQ.
Screen always
reads the
driest (lowest)
programmed
moisture
calibration
value while
displaying
dew/frost
point. Open circuit on sensor. Return probe to factory for evaluation.
Non-conductive material is
trapped under contact arm
of sensor. Clean the sensor and the sensor shield as
described in document 916-064,
Basic
Hygrometry Principles . 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 moisture.IQ.
Slow response. Slow outgassing of system. Replace the system components with stainless
steel or electro-polished stainless steel.
Sensor is contaminated
with non-conductive
particles (refer to
Basic
Hygrometry Principles ).
Clean the sensor and the sensor shield as
described in document 916-064,
Basic
Hygrometry Principles . Then reinstall the
sensor.
Exception
screen Unrecoverable software
error. Contact BHGE.
Table 12: Troubleshooting Guide for Common Problems (cont.)
Symptom Possible Cause System Response Action