Coordinated defrost via
data communication
Coordinated defrost via
cable connections
The following controllers can be connected
up in this way:
EKC 204A, AK-CC 210, AK-CC 250,
AK-CC 450, AK-CC 460, AK-CC 550,
Refrigeration is resumed when all
controllers have “released” the signal for
defrost.
The setting of controllers to coordinate
their defrosting takes place in the
gateway/system manager.
Refrigeration is resumed when all
controllers have “released” the signal for
defrost.
Supply voltage
230 V AC
DO1
Compressor 1 (only application 1 and 3)
Connection of relay for compressor. The coil must be a 230 V AC
coil.
DO2
Alarm
There is a connection between terminal 7 and 8 in alarm
situations and when the controller is without power.
DO3
Compressor 2,
There is connection between terminal 10 and 11 when the
compressor must be active
In application 2 this output is used for compressor start signal
DO4
Defrost
There is connection between terminal 12 and 14 when
defrosting takes place.
DO5
Fan
There is connection between terminal 15 and 16 when the fan
is on.
DO6
Light relay
There is connection between terminal 17 and 18 when the
light must be on. If night blinds are used, they should be
connected here.
DO7
Rail heat
There is connection between terminal 20 and 21, when the rail
heat is active.
DI3
Digital input signal.
Compressors safety circuit (OK at 230V)
The signal must have a voltage of 0 / 230 V AC.
Data communication
If data communication is used, it is important that the installation
of the data communication cable is performed correctly.
See separate literature No. RC8AC…
Electric noise
Cables for sensors, DI inputs and data communication must be
kept separate from other electric cables:
- Use separate cable trays
- Keep a distance between cables of at least 10 cm
- Long cables at the DI input should be avoided
Installation considerations
Accidental damage, poor installation, or site conditions, can give
rise to malfunctions of the control system, and ultimately lead to a
plant breakdown.
Every possible safeguard is incorporated into our products to
prevent this. However, a wrong installation, for example, could still
present problems. Electronic controls are no substitute for normal,
good engineering practice.
Danfoss wil not be responsible for any goods, or plant compo-
nents, damaged as a result of the above defects. It is the installer's
responsibility to check the installation thoroughly, and to fit the
necessary safety devices.
Special reference is made to the necessity of signals to the
controller when the compressor is stopped and to the need of
liquid receivers before the compressors.
Your local Danfoss agent will be pleased to assist with further
advice, etc.
Max. 10
User Guide | Controller for SemiPlugin appliance, AK-CC 460
© Danfoss | DCS (vt) | 2019.12
BC230086440483en-000201 | 27