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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, B1) on the main
board.
• When going from the show ' locking error' to show 'blocking error' menu (see figure
3.10), 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 (B1) can be released.
• The appliance type can now be selected by using right hand push button, B2, e.g.
A03.
Press the reset button, B1, 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.
3.6.1 DISPLAY IN NORMAL (STANDBY) MODE
in the standard/normal mode the 2 digit display shown in figure 6.2 indicates the
status of the appliance inputs and outputs by switching on the appropriate segments
of the display.
3.6.2 SENSOR TEMPERATURE
The sensors used in this appliance are listed in table 3.7. in this mode the current
temperature read by the selected sensor is displayed. The temperature reading is
displayed by alternatively flashing the sensor number and its temperature reading
or the error code shown in section 3.6.5.
3.6.3 CONTROL TEMPERATURE SET POINT
READING
in this mode the set points used in controlling the store heating and hot water
generation are displayed. The set point is displayed by alternatively flashing the S1
... S6 and the corrseponding set point. The available set-point reading are shown in
table 3.8
3.6.4 FAULT CODE INDICATION
The fault codes are divided into the following categories and are tabulated in table
3.9
• Locking Errors - These errors clear automatically when the fault is cleared and
these error codes are preceded by letter 'C' on the 2-digit controller display. These
errors will clear automatically when the fault is rectified.
• Blocking Errors - These errors can only be cleared by resetting the controller and
these error codes are preceded by letter 'c' on the digit controller display.
• Non critical sensor errors are stored in warning tables and under these conditions
the controller uses alternative control strategies to keep appliances functioning
and provide limited service.
E1
Open Circuit
E2
Short Circuit
E3
Temperature greater than 99ºc
TECHNICAL SPECIFICATION 3.0
3.6.5
COMPUTER INTERFACE
A laptop computer can be connected to
the controller for commissioning, system
monitoring and fault diagnostics. Typical
system status display screen on a PC is shown
in figures 3.11 and 3.12. The system control
parameters can only be changed within the
pre-set limits by means of a PC and appropriate
software to fine tune the system.
in the short term the software necessary for this
is restricted for use by the manufacturer.
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