Order number: 900323.001 V1.74
Page 20
© Störk-Tronic 2021 • www.stoerk-tronic.com • Subject to modifications.
Parameter description
d--
Defrosting control circuit 1
d0
Assignment of evaporator sensor
(defrosting sensor)
With this parameter, you can set which sen-
sor input is to be used as the evaporator/
defrosting sensor. The selected sensor must
be set up accordingly in the
H
parameters.
d1
Defrosting interval
The defrosting interval defines the time after
which a defrosting operation is started. Once
the defrosting operation is triggered, the de-
frosting interval starts again. A defrosting op-
eration 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 immedi-
ately and will trigger the first defrosting op-
eration as soon as the time set in
d1
has
elapsed. If
d1
=0, no automatic defrosting
operation will be performed.
d2
Defrosting mode
In this parameter, you can define if defrost-
ing is to be performed and, if yes, how it is to
be performed. You can choose among sim-
ple 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
d9
. Hot gas
defrosting will always be performed directly
after a refrigeration phase. Additionally, you
can define via parameters
d7
and
d8
if the
cold store temperature is to be lowered be-
fore defrosting.
d3
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
d4
, it will
be stopped.
d4
Defrosting time limitation
Here, you can set the max. time in which the
defrosting operation must be completed.
After the time set here, the defrosting oper-
ation will be stopped even if the evaporator
was not hot enough to be free of ice.
No error message will be displayed.
d7
Temperature difference for refrige-
ration before defrosting
d8
max time for refrigeration before
defrosting
To avoid unnecessary heating up of the cold
store, you can set up a refrigeration cycle
to be performed before the defrosting oper-
ation.
d9
Delay after compressor stop before
electric defrosting is started
If the compressor is on when an electric de-
frosting request is received, the start of the
defrosting operation is delayed by the time
specified here.
d10
Drip time
Directly after the end of defrosting, the drip-
ping time or drainage time follows in order to
let the evaporator drip off. During this time,
the compressor, defrost and evaporator fan
outputs are switched off.
d11
Off-delay of drip tray heating
Here, you can define how long the drip tray
heating is to remain switched on after a de-
frosting operation to avoid that the dripping
water freezes again.
d20
Display, forced release after de-
frosting
With
L4
= 0, the display can be frozen
during defrosting. After successful defrost-
ing the frozen display is released not later
than the time set here. If 0 is set, there will
be no forced release.
d99
Password for parameter level
d--
With this parameter, you can set the pass-
word for parameter level d--.
F--
Fan control circuit 1
F8
Fan speed in control mode, Set1
Fan speed in normal control mode and ac-
tive Set1
F9
Fan speed during defrosting, Set1
Fan speed during defrosting and active Set1
F10
Fan speed in control mode, Set2
Fan speed in control mode and active Set2.
F11
Fan speed during defrosting, Set2
Fan speed during defrosting and active Set1
F12
Start-up time (in seconds)
If necessary, the fan can be switched on at
max. speed for the time set here to ensure it
runs properly. This parameter is active only if
the fan is switched on from standstill.
F13
Minimum speed
Here, you can set the lowest voltage value at
which a connected fan will still be running.
F15
Evaporator fan: Fan mode control
mode
In this parameter, you can define how the fan
is switched on in control mode. If the con-
troller is per-forming a defrosting operation,
the fan will be controlled via parameter
F16
.
In the case of continuous operation, the fan
will be running as soon as the controller is
switched on. In the case of continuous op-
eration interrupted for draining, the fan will
behave like in the case of continuous oper-
ation. However, it will be switched off for the
time set in
F19
as soon as the defrosting
operation is complete. After the drain time
set in
F19
, the fan will be switched on again.
If the compressor is switched on before this
time has elapsed, the fan will be restarted
immediately (after the delay set in
F17
). In
the configuration with compressor On, the
fan will be switched on/off together with the
compressor. In order to avoid mains over-
load by starting the compressor and fan at
the same time, a delay can be defined in
F17
. The fan can also be temperature-con-
trolled. You can define if the evaporator sen-
sor temperature or the difference between
the evaporator and the cold store sensor is
to be used for controlling the fan. The con-
trol setpoint and hysteresis are defined via
parameters
F20
and
F21
.
F16
Fan mode defrosting
This parameter defines if the fan is to be on
or off during defrosting. This parameter will
not be effective in temperature-controlled fan
mode [
F15
=4 or 5].
F17
Delay after compressor On
In order to avoid mains overload by starting
the compressor and fan at the same time,
you can define a delay for the fan in this pa-
rameter. It will not be effective in tempera-
ture-controlled fan mode.
F18
Delay after defrosting
At the end of a defrosting cycle, the fan will
be switched on after the delay set in this pa-
rameter. This parameter will be effective in
all fan modes set up.
F19
Drip interruption time (if
F15
=2)
If the fan runs in continuous mode, there is
low temperature variation at high atmospher-
ic moisture. In operation mode "with com-
pressor on", the temperature variation will
be greater while the atmospheric moisture
is lower. This parameter is to enable a com-
bination of both advantages. The fan runs in
continuous mode and is switched off for the
time specified here when the compressor is
switched off. This enables the moisture ac-
cumulating at the evaporator to drain off.
F20
Control offset evaporator sensor
(for
F15
=4 or 5)
If
F15
=4 the following applies: The setpoint
for control circuit 1 (
c1
or
c3
) forms the
basis. If the evaporator temperature is be-
low the setpoint, the evaporator fan will be
switched on. This switching point can be
shifted by the value defined here.
If
F15
=5 the following applies: The tempera-
ture difference between cold store (sensor
from
c0
) and evaporator temperature (sen-
sor from
d0
) determines the switching point
for the evaporator fan. If the evaporator tem-
perature is below the cold store temperature,
the evaporator fan will be switched on. This
switching point can be shifted by the value
defined here.
