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The activation and deactivation of power steps for digital compressors must respect the activation and release times
for resources (parameters CP15 and CP16).
Power stages
For a segmented compressor in which the number of steps corresponds to the number of segments plus one, the
segmentation actuation mode depends on parameter CP11.
Parameter Description
Min
Max
M.U.
CP11
Enable/disable sequence of relays associated to compressor
power stages in the suction section
0
2
Num
For a whole compressor there are no power stages, so the compressor supplies either 0% or 100% of its power.
Example of compressor with 3 power stages (4 regulation power steps)
The compressors can supply 0%, 25%, 50%, 75% or 100% of their power.
CP11=0
CP11=1
CP11=2
Power ACC
STG 1 STG 2 STG 3 STG 1 STG 2 STG 3 STG 1
STG 2
STG 3
100%
ON
ON
ON
ON
75%
ON
ON
ON
ON
ON
50%
ON
ON
ON
ON
ON
25%
ON
ON
ON
ON
ON
0%
Compressor switch-on policies
The selection policy that the inlet regulator applies in the distribution of the refrigerator resources is defined by
parameter CP10. The policies available are saturation, balancing and fixed sequence.
Содержание EWCM 4120
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