5310923-06/02UK
Technical Manual TAR 1310 / 2310 / 4310
Page 2
3= Heating
Temperature Warning
A built-in buzzer comes on when the room
temperature exceeds the range set with para-
meters P22/P23 and the time delay set with
parameter P24 is over. A relay (K3) is available
for remote warning purposes if it is not used for
fan control.
You cancel the alarm by pressing any key. If the
K3 relay was selected for alarm function, it will
come ON again after the set time delay as long
and as often as the temperature stays in the
warning area. Parameter P29 indicates the time
to go for the next warning event.
With parameter P25 you set the alarm mode:
0= Buzzer only, relay K3 is used for
fan control
1= Relay K3; the relay operates
fail-safe (de-energized on alarm)
2= Relay K3; the relay operates
active (energized on alarm)
Internal Timer
The internal timer allows you to set up to four
defrost events per day with parameters P13
through P16. The defrost times are set in 10
minute increments in a 24 hour (military) format.
The time of the day is set with parameter P31 for
the hour and P32 for the minutes. The timer is
power backed up for about 10 days on power
failure. Because the display has three digits
only the time value comes in the following for-
mat:
Function
Display
All temperature values can be displayed in °C or
°F. Parameter P08 allows toggling these two
display modes.
Temperature Control
The controller compares the actual room tem-
perature with the setpoint (P03) and, according
to the deviation, energizes or de-energizes re-
lay K1. In order to be fail-safe in case of any
internal power failure, there is a possibility of
selecting the correct switching mode. In refrige-
ration mode the n/o relay contacts are used so
that the load is shut off in case of failure. In
freezing mode the load is connected to the n/c
contact, having the load running constantly in
case of failure.
The switching hysteresis (differential) is adju-
stable to prevent the system from short cycling
(parameter P04). With parameters P05/P06 you
can limit the setpoint range.
The switching mode (explained before) is set
with parameter P07.
1= Refrigeration
2= Freezing
temp.
setpoint
(P02)
hysteresis
(P03)
temperature
relay de-energized
time
relay energized
temp.
temperature
setpoint
(P02)
hysteresis
(P03)
relay energized
time
relay de-energized
relay energized
temp.
setpoint
(P02)
hysteresis
(P03)
temperature
relay de-energized
time
3rd Position=
minutes x 10
1st and 2nd
Position=
hours
Example:
13.20 = 01:20 p.m.