23 - table iii - trouble shooting guide – Intek RheoVac SENTRY User Manual
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Table III - Trouble Shooting Guide
Error Log
Description/Symptom
Probable Cause
Action
Communications not
being received from
probe(s)
1.
Improper cable hookup
2.
Blown main fuse
3.
Failed RS-485 circu it
4.
Damaged flow sensor
1.
Verify cable hookup is correct
2.
Check cable connections
3.
Contact factory
Invalid checksum received
from probe(s)
1.
Failed RS-485 communications
component
1.
Contact factory
Invalid checksum received
from probe(s)
1.
Failed RS-485 communications
component
1.
Contact factory
Relative saturation sensor
power 'O FF''
1.
Failed sensor or other electronic
component
1.
Contact factory
Relative saturation sensor
heater 'OF F''
1.
Failed electronic component
1.
Contact factory
Flow sensor heater
‘OFF'’
1.
Blown heater fuse (F3)
2.
Failed electronic component
1.
Replace heater fuse
2.
Contact factory
Pressure sensor heater
'OFF'’
1.
Blown heater fuse (F2)
2.
Failed electronic component
1.
Replace heater fuse, contact factory
2.
Contact factory
Temperature above
specified maximum limit
1.
Temperature above 210/F
2.
Possible sensor dam age
1.
Remove sensor from flow stream
and contact factory
2.
Contact factory
Wet probe
1.
This usually indicates a condenser
design or operation problem that
requires corrective action.
1.
Contact factory
RS sensor problem
1.
RS sensor or circuit has failed.
1.
Contact factory
Mass flow output
saturates high, will not
respond to flow changes
1.
Flow rate is not within range of
calibration
2.
Blown heater fuse
3.
Failed electronic component
1.
Contact factory about re-ranging
instrument
2.
Replace fuse
3.
Contact factory
Mass flow output
saturates low, will not
respond to flow changes
1.
Flow rate is not within range of
calibration
2.
Failed electronic component
1.
Contact factory about re-ranging
instrument
2.
Contact factory
If the RheoVac SENTRY is operating without error indications but output readings from one or more
probes are questionable, please send to Intek by telefax or e-mail the following plant data: turbine back
pressure, hot well temperature, load, and inlet and outlet circulation water temperatures, along with a
minimum of 4 hours of concurrent data from all RheoVac probes on that generating unit. You may also
contact the factory to transmit RheoVac SENTRY probe data via modem to the factory for analysis and
problem resolution.