Hydronix Hydro-Control VI Installation Manual page 95

Appendix B
The following tables list the most common faults found when using the controller. If you are unable to
diagnose the problem from this information, please contact Hydronix technical support on +44 (0) 1483
468900 or by email: support@hydronix.com.
Symptom: Displays shows 'Searching For Sensor' - no output from sensor
Possible explanation
No power to sensor.
Sensor has temporarily
locked up
Sensor MIL-Spec
connector pins are
damaged
Internal failure or
incorrect configuration
Symptom: Incorrect sensor readings
Possible explanation
Sensor unscaled
readings are incorrect
Incorrect recipe
calibration
Check Required result
DC power at rear of +24v DC
Hydro-Control, pins
31 + 33
Power down and Sensor functions
re-power sensor correctly
Disconnect the Pins are bent and
sensor cable and can be bent to
check if any pins normal to make
are damaged. electrical contact.
Connect the sensor Digital RS485
to a PC using the connection is
Hydro-Com working.
software and a
suitable RS485
converter.
Check Required result
Press Display Readings should be
Unscaled on the the following:
main screen
Sensor exposed to
air = close to zero.
Hand on sensor =
75-85
Check recipe for Moisture offset = 0
parameters to -5
'moisture gain' and
Moisture gain =
'moisture offset'
0.12 to 3
Action required on failure
Locate fault in power
supply/wiring
Check sensor connector pins
Check sensor configuration by
connecting to a PC.
Digital RS485 connection is
not working. Sensor should
be returned to Hydronix for
repair.
Action required on failure
Contact Hydronix for more
details.
Recalibrate recipe as per
instructions in the Operators
Guide. Moisture signal should
be stable at the end of the first
and final mix times for
increased accuracy.
Hydro-Control VI Installation Guide HD0455 Rev 1.9.0
Diagnostics
95