VISION SC600
Pag. 37
Rev. 02-18
USE AND MAINTENANCE MANUAL
deactivation is based on this sequence: PC10, C10, PC9, C9, PC8, C8, PC7, C7, PC6,
C6, PC5, C5, PC4, C4, PC3, C3, PC2, C2 ,PC1, C1.
The number of compressors enabled depends on the deviation between the value
measured by the adjustment pressure sensor (positioned at the intake) and the set
intake Set
point, as well as the t1C e t2C times. Namely, the “t1C” time determines the
minimum stay time of a step that has just been enabled, and the “t2C” time the
minimum stay time of a step that has just been disabled. These two times prevent
considerable temporary pressure changes from causing the compressors to switch on
and off.
Note: on the LCD display, the capacity control is indicated by the fact that the
corresponding pair of LEDs turns on. If a compressor or capacity control is waiting for
the t1C or t2C time, the corresponding LEDs on the display start to flash.
-
parameter SEq = 0 (with rotation)
If SEq=0 the compressors are activated based on their operating time. When there is a
request to activate a step, a compressor with a shorter operating time is activated,
provided it is not in stand-by and that there is no alarm associated with it. Upon a
subsequent request to enable a step, the capacity control of the last compressor
enabled will be activated. The compressor and relative capacity control are always
activated and deactivated in pairs: if the step is disabled, first the capacity control will be
disabled and then the relative compressor.
Note: if the Compressor inverters management is active (parameter iEn=1 or iEn=3), the
capacity control cannot be used.
For further information on how the Capacity Control is managed, see Graph 7.
CHAP. 5 - Data programming
