Page 8 of 13
The unit control in the cooling phase takes place depending on the temperature present
in the refrigeration chamber. The regulator can control the cooling temperature in the
range of -40
O
C up to +120
O
C. In order to limit the scope of the control so as to prevent
the user of the cooling device from setting the temperature outside this range, set the
proper parameters: b1 (limitation of the lower control temperature range) and b2
(limitation of the upper control temperature range).
ATTENTION
Temperatures specified in parameters b1 and b2 do not indicate control points
for switching off and switching on the operation of the unit.
Setting b1 = b2 blocks the possibility of changing the programmed temperature
by means of the ▲ and ▼ buttons. It is not allowed to set b1 > b2.
The change in the value of b1 or b2 can be blocked by the currently set control
temperature.
In the event of such a situation, change the control temperature settings and then
change parameters b1 and / or b2.
It is also important to set the control hysteresis correctly – parameter HI. The control
hysteresis is a parameter that determines the temperature difference at which
the switching off occurs and then the unit is switched on. For example, if the control
temperature is set to + 4
O
C and hysteresis to 2
O
C, then the unit will be switched off
after reaching 4
O
C, while its re-activation will occur after the temperature has risen
to 4+2 = 6
O
C.
The regulator allows to set the hysteresis of the control in the range of 0.2
O
C to 10
O
C,
every 0.2
O
C.
ATTENTION
If the regulator is set in heating mode, the hysteresis operation has the opposite
character, i.e. the heating system is switched off after the temperature has dropped
below the set value, taking into account the value of the programmed hysteresis.
7.2. Control of the stirrer’s motoreducer.
The working status of the stirrer is signaled by two red LED (see 3. CONSTRUCTION):
− signaling of switching on the stirrer’s motoreducer [8],
− indication of the stirrer operation mode [7].
The regulator has two modes of stirrer operation, i.e. automatic or manual, which are
described in detail below.
7.2.1. Automatic stirrer operation.
In this mode, depending on the settings of parameters F0, E1 and E2, the stirrer may be
connected to the operation of the unit or completely independent of the operation
of the unit (see 9. TABLE OF SETTINGS).
The stireer operation setting in the automatic mode is signaled by the continuous
lighting of the red LED [7].
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