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DESIGN
TECHNIC
AL DA
TA
Appliance Control Board
The appliance control board (shown above) has a 2 digit display and 2 push buttons.
Although this can be used to check the status of the appliance, we would suggest that
this is done on the control panel/display window on the front of the appliance, unless
this is faulty. However the controls should be used to check and set the appliance
identity and to interrogate it for any current faults and the fault history.
The 2 digit display is controlled by 2 buttons S1 and S2 The flow chart of display modes
is shown above. Generally, each press of button S2 cycles the display from top to
bottom and each press of button S1 cycles the display functions from left to right.
The button S2 is also used to reset the appliance i.e. clear the lockout errors and reset
the appliance. (Note: Appliance resetting can also be carried out using the push button
on the front panel)
Display in Normal (Standby) Mode
In the standard/normal mode the 2 digit display indicates the status of the appliance
inputs and outputs by switching on the appropriate segments of the display. Details of
the function/operation of the display are described in the Installation section of these
instructions.
Appliance Type Selection
The BoilerMate is fitted with an identity (ID) resistor which is read by the controller
for comparison with the appliance type (code) set on the controller. The two must
APPLIANCE CONTROL BOARD (A.C.B)
Fuse
T3.15L 250V
2 DIGIT ACB BOARD DISPLAY FLOW CHART
Press S2
Press S2
Press S2
Press S2
Press S2
S2 S1
Press
S1
Press
S1
Press
S1
Press
S1
Appliance
type
Press
S1
Press
S1
Press
S1
Press
S1
Appliance
type
Press
S1
Press
S1
Press
S1
Press
S1
Fault code indicator
block outs
Press
S1
Press
S1
Press
S1
Press
S1
Fault code indicator
lock outs
Press
S1
Press
S1
Press
S1
Press
S1
Control set-point
reading
Press
S1
Press
S1
Press
S1
Press
S1
Sensor temperature
reading
Normal - standby state
Indicate system status
S2
S1
2 digit
display
2 push
buttons
Main
processor
match for the controller/appliance to function.
Therefore if either the appliance code setting or
the ID resistor is wrong, the appliance will shut
down safely and flag the error code until the
fault is rectified. The controller codes and the ID
resistor values for the BoilerMate are A01 and
1K5 respectively. The procedure for checking
and setting the appliance code on the controller
is described below.
• The appliance selection menu (A0 ... A9) on
the controller is hidden. It is only possible to
get to the appliance selection using the reset
button (Left hand, S2) on the main board.
• When going from the show ‘ locking error’ to
show ‘blocking error’ menu (see opposite), do
not release the button but hold it for 10 seconds.
The display will change from ‘c’ to ‘A’. At this stage
the push button (S2) can be released.
• The appliance type can now be selected by
using right hand push button, S1, e.g. for this
appliance A01.
Press the reset button, S2, to accept the setting.
