TAC AB, 1998-10-23 0-004-7614-0 (GB), 7:21 (24)
TAC 2413 Handbook Functional description
7.6.3 Frost protection alarm
When the frost protection alarm is tripped, the symbols
!
and
+
will flash in the display window. When there is a risk of the heating
coil freezing, the frost protection sensor in the return pipe will control
the valve actuator so that it opens.
If the temperature goes below the set freezing limit, the “frost protec-
tion guard” is released, the AHU is stopped after a five second delay,
and an A alarm is tripped.
If the “frost protection guard” is short-circuited, a special alarm,
“Faulty sensor” is tripped. The AHU is stopped, and an A alarm is
tripped.
A alarms will always trip the sum alarm and must be reset manual-
ly.
P No. Parameter Min. Max. Factory set.Change Comment
P 73 Frost protection alarm tripped A alarm
P 74 Faulty frost sensor A alarm
alarm tripped
P 29 Frost protection setpoint 4 °C 50 °C 8 °C
7.6.4 Pump/Overheating alarm
When the pump alarm is tripped, the symbols
!
and “P
V
” will
flash in the display window. When the overheating alarm is trip-
ped, the symbols
!
and apply. The same input is used fot
the heating coil pump alarm as for the overheating protection of
the electric battery. Both will trip an A alarm which will stop the
AHU and activate the sum alarm. The alarm must be reset manu-
ally.
The alarm is tripped after a five second delay when the contact is
open if the control (K4) is on.
P No. Parameter Min. Max. Factory set. Change Comment
P 75 Pump alarm for the A alarm
heating coil tripped
P 76 Overheating alarm for A alarm
the electric battery tripped
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