Parameter description:
P0: Indication of cold room temperature (F1)
P2: Indication of evaporator temperature (F2)
The here indicated temperatures present the sum of the respective actual measured value of feeler
F1/F2 and the actual value correction according to parameter P1/P3.
P1: Calibration sensor F1
P3: Calibration sensor F2 (evaporator)
This parameter allows the correction of actual value deviations caused for example by sensor
tolerances or extremely long sensor lines. The regulation measure value is increased or decreased
by the here adjusted value.
P4: Sensor type F1
P5: Sensor type F2
This parameter permits selection of the sensor type, if the needed hardware prerequisites are
available. If the evaporator sensor F2 is disabled (P5=0) the parameters d2, F0, F1 and F2
become ineffective.
P6: Display mode
The value can be indicated in integrals or with decimals. In general, all parameter indications are
presented with decimals.
P7: Temperature scale
Adjustment of the desired temperature scale and net frequency.
r0: Hysterese for the compressor contact
Parameter r0 sets the temperature margin between switching off and switching on of the
compressor. A small hysteresis permits a more exact regulation, however also leads to more
frequent switching of the compressor. The hysteresis is set one-sided above the setpoint
r1: Setpoint limitation (minimum)
r2: Setpoint limitation (maximum)
These parameters limit the adjustment range of the setpoint S1, in order to avoid that the end user
sets inadmissible values for the plant.
c0: Start protection of the compressor after "cooling on"
After cooling is switched on (e.g. by switching on the mains voltage) the start of the compressor is
retarded until the protection running time is over. This secures e.g. that several cooling units do not
start at the same time and load the electricity supply net.
c1: Start protection of the compressor after compressor start
This time protection starts when the compressor is switched on. After switching the compressor off,
a renewed switching on is impossible until this protection time runs out. This prevents from too
frequent switching-on of the compressor and thus increases its life span.
c2: Start protection of the compressor after compressor stop
This time protection starts when the compressor is switched off. After switching the compressor off,
a renewed switching on is impossible until this protection time runs out.
c3: Function in the case of error of refrigerating chamber sensor F1
Here is determined whether the compressor keeps running or not in the case of an error of the
refrigerating chamber feeler F1. When deep-freezing, the compressor should normally continue
running, in order to prevent de-frosting of the goods. At the normal cooling range above 0 °C, a
continuation, however, could lead to frost damages.