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7.5 Priority of Heating and Timer Mode
T
o activate the ‘Priority’ and ‘Timer’ modes together touch the ‘M’ button key until both symbols
and
are displayed.
In this mode the controller will heat whenever it is receiving flow during a timed-on period.
8. TROUBLE SHOOTING
Heating Device will not switch on
In most cases this will be the result of one of the following not being met:
Possible Cause 1.
The required temperature has been reached.
To confirm the controller is requesting the heating device to switch on check that
the required temperature is at least 0.6⁰C greater than the current water temperature
and that the red
thermometer in the display is ‘animated’ showing the thermometer
increasing.
Possible Cause 2.
Insufficient Flow.
The display will show
‘NO FLOW’
if the flow switch has detected that the flow
volume is below 4,000-litres per hour (4m³/h).
Check that the flow volume is greater than 4,000-litres per hour and that the flow
switch is in the correct orientation to sense flow (i.e. check that the arrow moulded
into the flow switch body is facing in the same direction as the flow travelling through
the T-Piece).
Possible Cause 3.
The controller is in a timed off period.
Check if the controller has the ‘TIMER’ symbol
displayed
– if it does check your
clock and time period settings (explained in the set-up section).
Possible Cause 4.
The heat output has not been correctly connected to the control circuit of your
heating device.
Check the wiring diagram for verification on how the controller should be connected
to the heating device and seek the expertise of a qualified electrician if in any doubt.
