1592015820 User manual IC260_261L_D DUO FW1.9 rel. 1.0
Pag. 56 of 149
switched off (relay K2 Fig.2). Then after the CO12 delay time the relay of the line #2 is turned on (relay K3
Fig.3).
Compressor switching off:
the output relay of the line #1 and line #2 are switched off together.
Fig. 3
Star - Delta Start- Up Of A Capacity Compressor
If one or more capacity compressors are configured and the thermoregulation requires the full load control,
the controller turns the solenoid valve on, then after 1 second the centre of the star relay is turned on (relay
K2 Fig. 3). Then the star-delta procedure will be completed with the other two contactors. Durning the CO13
time delay the step valve is forced on: minimum power. When the C013 is expired if the thermoregulation
requires more power the valve will be switched off (maximum power).
22. COMPRESSORS ROTATION
The
CO14
parameter determines the sequence of compressor activation / deactivation.
CO14= 0
Fixed sequence.
E.g.: 3 compressors configured
Switching on: 1
st
compressor
2
nd
compressor
3
rd
compressor
etc.
Switching off: 3
rd
compressor
2
nd
compressor -
1
st
compressor
CO14= 1
Working hour rotation
First compressor to be activated is the compressor with less working hours; next compressor to be activated
follows the same rule.
CO14= 2
Sart-up rotation
First compressor to be activated is the compressor with less start-up; next compressor to be activated
follows the same rule.
23. CAPACITY STEP CONTROL
CO06
capacity step operation mode.
To select the right operation mode, please read the compressor technical documentation.
CO06 = 0 ON/OFF step
Eg: compressor with 3 capacity step.
Capacity
25%
50%
75%
100%
Compr.
Compressor
ON
Compressor
ON
Compressor
ON
Compressor
ON
Out relay
Cap. step 1
ON
Cap. step 1
OFF
Cap. step 1
OFF
Cap. step 1
OFF
