High-pressure function: Releases until
alarm
In the case of a high-pressure signal via a
parameterised switching input, the compressor will
be switched off immediately and a message will be
displayed. If the high-pressure signal disappears
within 15 minutes, the error message will be
deleted and the compressor will be started again.
However, an alarm via the alarm relay will only be
triggered if the number of registered releases
(within 15 min.) set in this parameter is exceeded or
if the signal is present for more than 15 minutes.
This fault will only be deleted after disconnection of
the plant from mains supply (and repair!).
Low-pressure function:
Delay until alarm
If a low-pressure signal is present via a
parameterised switching input and it does not
disappear again within the time specified here, the
compressor will be switched off and an error
message will be displayed. This fault will only be
deleted after disconnection of the plant from mains
supply (and repair!).
Password for parameter level
With this parameter, you can set the password for
parameter level
.
Buttons and
switching inputs
(password-
protected)
…
Function buttons 1 … 8
Certain functions can be assigned to the buttons.
The buttons are arranged according to the front foil,
the layout may differ from case to case. For the
function of the buttons, refer to the operating
manual of the relevant device. The "SET"
cannot
be assigned another function!
,
,
,
Function E1 … E4
Certain functions can be assigned to the switching
inputs.
,
,
,
Switching mode E1 … E4
Here, you can define if the switching input is used
as a make contact (normal) or break contact
(inverse).
Password for parameter level
With this parameter, you can set the password for
parameter level
.
Control circuit 1
Assignment of cold store sensors
With this parameter, you can set which sensor input
is to be used as the cold room sensor. The selected
sensor must be set up accordingly in the
parameters.
Control circuit 1: Setpoint (Set1)
Control circuit 1: Night-time incr./decr.
Control circuit 1: Setpoint (Set2)
With this parameter, you can set the setpoint. It will
be displayed directly if you press the SET button
and can be edited. The setting range is defined by
the settings in parameters
and
. Setpoint
becomes active if the Set2 function is switched on
via a button, a digital switching input, the internal
clock or the ST-bus. Setpoint
becomes active if
the night-time increase/decrease function is
switched on via a button, a digital switching input,
the internal clock or the ST-bus. The value of
is
added to the currently active setpoint
or
.
Control circuit 1: Switching mode
The switching mode of the control output can be set
to heating or refrigerating function. In the case of
the heating function, the control output is switched
on if the actual temperature is lower than the set
temperature. In the case of the refrigerating
function, the output is on if the temperature is
higher than the setpoint.
Control circuit 1: Hysteresis
In this parameter, you can specify the control hyste-
resis. A small hysteresis enables exact control, but
will result in frequent switching of the relay.
Hysteresis mode
With this parameter you can define if the hysteresis
will be active at the corresponding switching point
symmetrically or on one side only. In the case of a
one-sided hysteresis, the hysteresis will be active
below the setpoint in the case of the heating
function [
=0] and above the setpoint in the case
of the refrigerating function [
=1]. In the case of a
symmetrical hysteresis, there is no difference.
Upper setpoint limit
Lower setpoint limit
Setpoints
and
can only be set within the
limits defined here.
