AK-PC 560 Manual RS8GE202 © Danfoss 01-2016 11
Compressor connections
Coupling
mode
Relay no.
Set
"c08"
to
Set
"c16"
to
Capacity step
All capacity steps are presumed to be identi-
cal.
Coupling mode
Coupling mode 1 = sequential operation.
Compressor 1 will be the rst to start. Then
compressor 2 and so on.
Coupling mode 2 = cyclic operation.
Compressor 1 will always be in operation
when cooling is required. After this the com-
pressor with the lowest number of operating
hours will be started.
Compressor conguration when o61 =1 or 2 (This is where you can choose between the options
shown.)
Setting "c16" will dene the conguration.
Setting "c08" will dene coupling mode.
The capacity from the digital scroll compressor
The capacity is divided into period times as "PWM per". 100% capacity is delivered when cooling takes place for the whole period.
An o time is required by the by-pass valve within the period and an on time is also permitted. There is "no cooling" when the
valve is on.
The controller itself calculates the capacity needed and will then vary it according to the cut-in time of the by-pass valve.
A limit is introduced if low capacity is needed so that the cooling does not go below 10%. This is because the compressor can
cool itself. This value can be increased if necessary.
The capacity can similarly be limited so that the compressor cannot deliver 100% capacity. It is not normally necessary to limit
this max. capacity.
Refrigeration
No refrigeration
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