Operations & Maintenance Manual
January 2002
Doc: TC02 O&M
Page 9 of 20
Status:
Final
issue: 11
©TB Controls 2011
4.3.
Error Messages
4.3.3. Master
There are a number of possible error or operation messages; these will be displayed on
the LCD screen.
BMS or Time switch control
when connected to the controller it will signal the controller
to turn off. The controller will shut down the heating then work through the fan run on
period, and then stop. The display will read;
“BMS/Time Switch Unit OFF”
Overheat Stat
A temperature fault will be displayed when the cut out switch signals the
controller. The display will read; “Over Temperature Trip”
Occupancy
sensing enables the controller for a predetermined period for example 10
minutes; if no further signal is received in this period then the unit will shut down and await
a further occupancy signal. The display will read; “Unoccupied Unit OFF”
Where the
Off Coil
Temperature sensor fails
the heating will be turned off. The display
will read; “Off Coil Sensor Fault”
Where the
Return Air
Temperature sensor fails
the heating will still be functional. The
display will read;
“Return Air Sensor Fault”
Where the
Outside Air
Temperature sensor fails
the display will read;
“Outside Air
Sensor Fault”
4.3.4. Slave Messages
Slave unit error messages will be displayed on the LCD unit with the Slave unit number.
BMS or Time Switch:
“BMS/Time Switch....Slave X OFF”
Overheat stat:
“Over Temperature.....Trip Slave X”
Occupancy sensor:
“Unoccupied .......Slave X OFF”
Off Coil Sensor fault:
“Off Coil Sensor.... Fault Slave X”
Return Air Sensor fault:
“Ret Air Sensor.... Fault Slave X”
Slave comms connection fault:
“Slave X Comms Fault”
4.4.
LCD Modes
There are three modes in the LCD display unit these are outlined below.
4.4.5. LCD Set up Mode
To enter set up mode press and hold all three buttons for more than ten seconds, the unit
will display “LCD set up mode” there are two options; “module address x” and “backlight x”
The
module address
is the unique identity given to the unit to enable the Master unit to
determine with which unit data is exchanged.
