Order no. 900340.012
V1.54
Page 22
Upper setpoint limit
Lower setpoint limit
Setpoints
and
can only be set within the limits
defined here.
Start protection after compressor start
This protection time starts as soon as the compressor
is switched on. When the compressor is switched off, it
cannot be switched on again until this time has
elapsed. This is to avoid excessive activation and to
increase the service life as a consequence.
Start protection compressor after
compressor stop
This protection time starts as soon as the compressor
is switched off. The compressor cannot be switched on
again until this time has elapsed. This is to avoid
excessive activation and to increase the service life as
a consequence.
Start protection compressor after mains On
Activation of the control output is prevented after
"Mains On" until this time has elapsed. This function
can be used, for example, to avoid that several
controllers are switched on at the same, which would
result in a high load on the power supply network.
On-time in emergency operation
Cycle time in emergency operation
With these parameters, you can define how the
compressor is to behave in the case of a sensor fault.
In emergency operation, the compressor is operated in
a cycle of
. The on-time in
is a percentage of
the cycle time, with 100% meaning that the
compressor runs continuously and 0% meaning that
the compressor is off all the time. In deep-freeze
stores, the compressor should continue operation in
order to avoid defrosting. In normal cold stores above
0°C continued operation might result in frost damage,
however. During emergency operation, no defrosting
will be performed.
Sensors for "super-frost" function
With this parameter, you can set which sensor input is
to be assigned to the "super-frost" function. Depending
on the sensor design, it can also be used as core
and/or product temperature sensor. The selected
sensor must be set up accordingly in the
parameters.
"super-frost": lime limit,
"shock-frost", "max. refrigerating power"
"super-frost": temperature limit,
"shock-frost", "max. refrigerating power"
"super-frost": deactivation,
"shock-frost", "max. cooling power"
If this function is activated, the lower warning limit is
deactivated and the compressor is on permanently. In
, you can define if automatic shut-down is to be
performed and if this automatic shut-down is to be
limited by time only or by temperature, too. Limitation
by time is defined via
, the temperature condition
is defined via
.
Password for parameter level
With this parameter, you can set the password for
parameter level
.
Defrosting control circuit 1
Evaporator sensor (defrosting sensor)
With this parameter, you can set which sensor input is
to be used as the evaporator/defrosting sensor. The
selected sensor must be set up accordingly in the
parameters.
Defrosting interval
The defrosting interval defines the time after which a
defrosting operation is started. Once the defrosting
operation is triggered, the defrosting interval starts
again. A defrosting operation can also be triggered by
pressing the
UP
button ("manual defrosting“) for at
least 3 seconds or another parameterised button. Via
the internal week timer, defrosting can also be started
in real time. Once switched on, the controller starts
refrigeration immediately and will trigger the first
defrosting operation as soon as the time set in
has
elapsed. If [
=0], no automatic defrosting operation
will be performed.
Defrosting mode
In this parameter, you can define if defrosting is to be
performed and, if yes, how it is to be performed. You
can choose among simple shut-down of the
compressor, defrosting by electric heating or by hot
gas. Electric defrosting will always be performed after
a compressor break, defined in
. Hot gas defrosting
will always be performed directly after a refrigeration
phase. Additionally, you can define via parameters
and
if the cold store temperature is to be lowered
before defrosting.
Defrosting temperature
A defrosting operation is complete as soon as the
temperature set here is reached at the evaporator. If
the defrosting operation is not completed within the
time set in
, it will be stopped.
