Page 22
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
S2 S1
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
Appliance Control Board
The appliance control board (shown opposite) has a 2 digit display and 2 push buttons
which are used to check the status of the appliance, check and set its identity and
interrogate it for the 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)
Note: The board is used on a range of products and not all terminals are used on
every appliance.
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 - see
page 24 for details.
Appliance Type Selection
The PulsaCoil 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
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 PulsaCoil are 03 and 3K3 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 A03.
Press the reset button, S2, to accept the setting.
If the selected appliance code does not match
with the ID resistor fitted to the appliance, then,
an error ‘33’ will be displayed.
SERVICING
FAULT FINDING
Содержание PulsaCoil PCS 120
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