12
If choosing hardware set up, it is only possible to mount a mechanical thermostat. The battery cut in and
cut out values can be set with resistors.
Battery protection resistors must be mounted between S2 and C and a 316 ohm resistor must be mounted
between S1 and C, in series with the thermostat, which indicates you will programme the setting with
resistors.
The compressor cuts in and out whether the mechanical thermostat is open or closed.
For further information also see the wiring diagram.
Auto
It is possible to connect a mechanical thermostat or a NTC sensor.
Auto setting is default.
Battery protection settings are default values from TOOL4COOL® and may be changed through the
software.
When using the NTC 1 sensor the compressor cuts in and out through the set point chosen in
TOOL4COOL®.
NTC (NTC 1)
An NTC sensor must be connected. If there is no NTC connected the unit will show a failure.
The compressor cuts in and out through the set point chosen in TOOL4COOL®.
Mechanical
The unit senses the mechanical thermostat and reacts with an ON and OFF signal. The battery protection
setting can be set via TOOL4COOL®.
If there is a need to measure the ambient temperature, it is possible to mount a NTC in sequence with a
4.7 kohm resistor, between the terminal S2 and C.
When the NTC is connected, the sensor creates two additional functions.
It protects the system from overheating; when the ambient temperature is above 55 °C the compressor
will stop.
Secondly, when performing the self test (see section16), the sensor ensures that the ambient temperature
is no higher than 30 °C.
Fridge mode / freezer mode (NTC 1)
When running on NTC sensor, two temperature set points are possible in TOOL4COOL®, which are then
connected to the NTC sensor and can be selected with two push buttons.
1. By default, the unit will run on the fridge set point.
The set point can be changed via TOOL4COOL® or when the push button is connected to the MMI
interface. When the push button is pressed once, the system will begin to operate with the set point and a
corresponding LED will light up (if connected). When the push button is pressed a second time, the system
will stop.
The set points can be changed by pushing the other push button.
Forced on
With TOOL4COOL®, the system may be set to a forced mode. This creates a constant cooling demand,
independent of the set points or the sensor connected to S1 and C.
11.1
Hardware set up
11.2
Software set up
Thermostat type
Auxiliary temperature
(NTC2)
Operating state only
applicable for NTC
sensor
11.
THERMOSTAT
To Next Page
Loading...
