Light Function; Night Blind - Danfoss AK-CC55 Compact User Manual

AK-CC55 Compact
Figure 23: Fan ECO control – Fan speed reduced to 50% during night operation
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The fans will always run with full speed during day operation, first stage of case cleaning, defrost, forced cooling and
when air heating is active.

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. 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.
When the night blind function is used, the thermostat function can control with different weighting between the S3
and S4 sensors. A weighting during day operation and another when the blind is closed.
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.
© Danfoss | Climate Solutions | 2022.08
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