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USER MANUAL – Release 1.2 of 01/01/2010
Page 103 of 191
Version: 02/03/2010
If a N° of peaks set in the parameter is reached by a compressor in 1 working hour (maximum n° of
compressor peaks per hour), in the case of other available steps the next temperature control request is
turned to the latter.
NOTES REGARDING THE COMPRESSOR REGULATOR
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Every compressor must remain active at least for CO01 after its activation. The switch-off causes due to
alarm, STAND-BY / ON OFF remote or defrost or partialisation from NTC probe transducer
are an
exception to this rule
!
After its deactivation every compressor must remain off at least for CO02.
!
!
If the regulator requests the switch-on of the two compressors/steps with the fixed sequence and rotation
enabled, start-up between the two is delayed by CO03 seconds
!
If the regulator requests the switch-off of the two compressors/steps with the fixed sequence and rotation
enabled, switch-off between the two compressors/steps s delayed by CO04 seconds
!
In the case of a mains power-cut, on restore
ALL OUTPUTS
are forced into OFF for the time CO05.
27. COMPRESSORS SWITCH-ON
The type of start-up is chosen via the compressor start-up parameter:
0 = (direct start-up)
1 = (part winding start-up)
2 = (star delta start-up)
The relay resources must be configured correctly in the CF family in order to manage compressor/s start-up
Once the type of start-up has been selected, if the resources (relay outputs) are incorrectly configured (over-
dimensioned or insufficient) an ACF6 configuration error is generated on the display
27.1 DESCRIPTION OF DIRECT START-UP
It is used with alternative hermetic, semi-hermetic, screw and scroll compressors with small-medium
dimensions.
27.2 DIRECT START-UP
One relay output per compressor must be configured (Relay K1 Fig.1). Every relay output commands 1
compressor. It is possible to configure the relay outputs up to a MAX of 6 compressors.
Fig. 1
27.3 DIRECT START-UP OF A PARTIALISED COMPRESSOR
The switch-on procedure is the same as written above. If compressor/s with partialisations have been
configured if switch-on is requested at full compressor load, first the partialisation solenoid is excited (always
the step with the lowest index, the part. N° 1) and after 1 second (fixed time) the compressor relay is
activated. On passing the delay CO15 even if working at minimum power has been enabled from the
parameter but the heat regulator does not request switch-on, the solenoid is unexcited. If the time set in Par.
CO15 = 0 the function is disabled
