TAC AB, 1998-10-23 0-004-7614-0 (GB), 7:23 (24)
TAC 2413 Handbook Functional description
7.6.7 Deviation alarm
The symbols
!
and “°C” will flash in the display window when the
deviation alarm is tripped. If the supply air temperature deviates from
the setpoint by more than an adjustable limit, which is factory set to
±3 °C, for 60 minutes, the alarm is tripped. An A or B alarm may be
chosen. A alarms will always trip the sum alarm, stop the AHU and
be reset manually. B alarms may trip the sum alarm as an option and
are reset automatically.
P No. Parameter Min. Max. Factory set.Change Comment
P 80 Deviation alarm tripped A alarm or B alarm
P 85 Deviation alarm, summer 0 (0=disabled, 1=active)
period
P 86 Deviation alarm, choice 0 0=B, 1=B+Sum, 2=A
of alarm type
P 87 Deviation alarm limit 0 °C 20 °C ±3 °C
7.7 Memory backup
All the set parameters, such as setpoints, weekly programs etc, are
stored permanently in the controller. They will remain in the memory
of the controller even after a long power failure.
However, after a power failure which has lasted for longer than
48 hours, the clock must be set.
7.8 Cold start
If there is a need for restoring the factory settings of the controller,
this is done by going to parameter P--. The reset is done by pressing
the plus button and then the enter button.
This procedure is recommended if any DIP switch has been altered
since the controller was commissioned.
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