
Status LED
Indicator
No power, No connection,
controller failure
Off – relay open
Control Operation
< Low Set Point
Orange (constant) – relay closed
Within Control Band
Green (constant)
> High Set Point
Red (constant) – relay open
Control Status
Warm Up (30 minutes)
Green (Slow Flash -2 sec period)
- relay open
Wrong Switch Setting (eg.
low rotary > high rotary)
Orange (Fast Flash -0.5 sec period) –
relay open
Sensor Failure
Red (Fast Flash 0.5 sec period)
– relay open
Switch Operation
Normal operation
Green (constant)
Low Switch
Yellow (constant)
High Switch
Red (constant)
Sensor Head Failure
The sensor failure LED signal (red fast flash) will activate due to:
•
Sensor Life Exceeded –
this indicates that the sensor has
operated beyond its design life and should be replaced.
•
Sensor Failure-
the sensor head is no longer operating
within the on-board diagnostic settings and should be
replaced.
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