Secure SRT321 User And Installation Instructions Manual page 5

When the thermostat is in the 'call for heat'
condition a flame symbol will appear in the
display.
Pressing the temperature setting dial will allow
the user to check the current actual measured
room temperature which will be displayed for
approx 7 seconds before returning to the set
temperature.
The aerial symbol complete with radio wave
symbols in the display of the SRT321
thermostat indicates that it is communicating
satisfactorily with the rest of the system.
A flashing radio wave indicates a loss of
communication. This may be temporary and can often
be restored by turning the thermostat dial and
increasing or decreasing the temperature to make the
thermostat send a temperature update to a controller. If
this has no effect please see Z-Wave pairing
instructions on page 6.
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