TAC 2413 - Freezing Alarm; Efficiency Alarm

7:22 (24), 0-004-7614-0 (GB) TAC AB, 1998-10-23
TAC 2413 Handbook Functional description
7.6.5 Freezing alarm
The symbols
!
and
+
will flash when the freezing alarm is
tripped. It is tripped if the defrosting has been activated by way of a
closing contact from the pressure sensor and not been stopped within
the “Max. allowed defrosting time”. The AHU is stopped and an A
alarm is tripped. The alarm activates the sum alarm and must be reset
manually.
P No. Parameter Min. Max. Factory set. Change Comment
P 42 Max.allowed defrosting time 0 min 60 min 30 min (will trip an A alarm
if it is exceeded)
P 77 Freezing alarm tripped A alarm
7.6.6 Efficiency alarm
When the efficiency alarm is tripped, the symbols
!
and
+
will flash in the display window. The efficiency alarm is tripped
when the following things happen:
• The HEX signal is 100 % and the limitation is not active.
• The efficiency is below the set alarm limit for 60 minutes.
It is possible to choose between an A or B alarm. The A alarm
will stop the AHU, activates the sum alarm and must be reset ma-
nually. The B alarm may activate the sum alarm as an option and
is reset
automatically.
P No. Parameter Min. Max. Factory set. Change Comment
P 79 Efficiency alarm A alarm or B alarm
tripped
P 83 Efficiency alarm, 0 0=B, 1=B+Sum, 2=A
choice of alarm type
P 84 Efficiency alarm, 0 % 100 % 50 %
alarm limit