gledhill Torrent GreenHeat TGH140-OV Design, Installation & Servicing Instructions page 43

SERVICING AND MAINTENANCE
Normal - standby state
Indicate system status
Press S2
Sensor temperature
reading
Press S2
Control set-point
reading
Press S2
Fault code indicator
lock outs
Press S2
Fault code indicator
block outs
2 DIGIT ACB BOARD DISPLAY FLOW CHART
Appliance Control Board
The appliance control board (shown above) 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 fl ow 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.
Appliance Type Selection
The Torrent GreenHeat is fi tted 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 fl ag
the error code until the fault is rectifi ed.
S2 S1
Press Press Press
S1 S1 S1
Press Press Press
S1 S1 S1
Press Press Press
S1 S1 S1
Press Press Press
S1 S1 S1
Page 43
Press
S1
Press
S1
Press
S1
Press
S1
APPLIANCE CONTROL BOARD (A.C.B)
Press the reset button, S2, to accept the setting.
If the selected appliance code does not match
with the ID resistor fi tted to the appliance, then,
an error '33' will be displayed.
2 digit
display
2 push
buttons
S2 S1
Main
processor
FAULT FINDING