Light Function; Night Blind; Humidity Control - Danfoss AK-CC55 Multi Coil User Manual

AK-CC55 Multi Coil
(The function is not actual when r14=2, i.e. modulating regulation).
A period of time is set as well as the percentage of this period of time where the fans have to be operating.
Figure 19: Fan cycle time
Cut-out of fans during plant breakdowns
If the refrigeration in a breakdown situation stops, the temperature in the cold room may rise quickly as a result of
the emission of heat from large fans. In order to prevent this situation, the controller can stop the fans if the
temperature at S5 exceeds a set limit value. The fans will start running again when the S5 temperature has dropped
2K below the set limit. (The function can also be used as a type of MOP function. Here the load on the compressors
is limited until the S5 temperature has fallen below the configured value).

Light function

The function can be used for controlling the light in a refrigeration appliance or in a cold room. It can also be used
for controlling a motorised night blind.
The light function can be defined in several ways:
1. The light is controlled via the day/night function. A digital input setup for light control can switch light ON, if the
light is switched off during night
2. The light is controlled by a system manager via the parameter o39. A digital input setup for light control can
switch light ON, if the light is switched off by the system manager.
3. Light is controlled via the door switch. Light is switched ON when door is opened and switched OFF 2 minutes
after the door has been closed.
4. Like option 2, but here the light is switched ON automatically if the communication to the system manager has
been lost for 15 minutes
5. Light is only controlled via a digital input setup for light control
The light load must be connected to the NC terminals on the relay.
This ensures that the light remains ON in the appliance if power to the controller should fail.
A setting defines how light is controlled when regulation is stopped via r12 Main switch = OFF (see o98). The light is
switched off when the appliance cleaning function is activated.

Night blind

Motorised night blinds can be controlled automatically from the controller via the NO connector on the light relay.
The night blinds will follow the status of the light function. When the light is switched on, the night blinds open, and
when the light is switched off, the night blinds close again. When the night blinds are closed, it is possible to open
them using a switch signal on the digital input. If this pulse signal is activated, the night blinds will open and the
refrigeration appliance can be filled with new products. If the pulse signal is activated again, the blinds close.
A night blind is opened when the appliance cleaning function is activated.
A setting can define that the night blind is opened when "r12" (Main switch) is set to off (see o98).
When the night blind rolls down, the fan will be stopped for the set time. The night blind can thereby roll down to
the correct position.

Humidity control

In application 4 when setup for room control it is possible to define if humidity control should be done via a
humidifier or a dehumidifier.
When humidity control is enabled, the second display will read out the actual humidity.
© Danfoss | Climate Solutions | 2022.08 BC365022028193en-000201 | 17