Order no.: 900312.001
V2.0
Page 24
starts again. A defrosting operation can also be
triggered by pressing the
UP
button ("manual defro-
sting“) for at least 3 seconds or another parameter-
ised 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 auto-
matic 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.
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 operation will
be stopped even if the evaporator was not hot
enough to be free of ice.
No error message will be displayed.
Display of cold store temperature during
defrosting operation
It must be expected that the cold store temperature
will increase slightly during a defrosting operation.
If [
= 0], the actual cold store temperature will be
displayed during the defrosting operation.
If [
= 1], the temperature measured directly
before the start will be displayed until the cold store
setpoint is reached again after the end of the
defrosting operation. This is to avoid irritation of the
user during the defrosting phase. In the case of an
alarm, the display will be flashing and the actual
cold store temperature will be displayed.
Temperature difference for
refrigeration before defrosting
maximum refrigerating 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 operation.
Delay after compressor
stop before electric defrosting is started
If the compressor is on when an electric defrosting
request is received, the start of the defrosting
operation is delayed by the time specified here.
Drip time
Directly after the end of the defrosting operation,
the drip / dewatering time will start let the evapo-
rator drain. During this time, the compressor, defro-
sting and evaporator fan outputs are switched off.
Off-delay of drip tray heating
Here, you can define how long the drip tray heating
is to remain switched on after a defrosting operation
to avoid that the dripping water freezes again.
Password for parameter level
With this parameter, you can set the
password for parameter level d--.
Fan control circuit 1
Fan speed in control mode, Set1
Fan speed in normal control mode and active Set1
Fan speed during defrosting, Set1
Fan speed during defrosting and active Set1
Fan speed in control mode, Set2
Fan speed in control mode and active Set2.
Fan speed during defrosting, Set2
Fan speed during defrosting and active Set1
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.
Minimum speed
