Technical data

Ichill 200CX EVO rev 1.1 14/11/2013
Pag. 77 of 151
• FS49=1 Example for machine with 3 compressors
Domestic hot water heaters:
Domestic hot water is produced using mainly the compressors; the domestic hot water heaters are only used
to produce domestic hot water if one or more compressors are not available for regulation (due to an alarm
of a compressor, activation of the unloading function,..) or if the domestic hot water set-point is not reached
within a configured timeframe (described in greater detail below).
The FS08 parameter allows you to determine if the domestic hot water heaters can be used when a
compressor is not available.
When the sanitary heaters are activated, the regulation band is divided according to the number of
compressors and sanitary heaters available (see figure below).
Max time for reaching the domestic hot water set-point
A counter determines the maximum time for reaching the domestic hot water set-point as from the moment
the production of domestic hot water is requested; once this time has elapsed (parameter FS09) there are 2
options:
• If FS07=0, enable all the compressors (if not already enabled)
• If FS07=1, enable all the compressors and all the heating elements
After all the available steps (compressors and heaters) have been enabled, they remain activated until the
domestic hot water set-point has been reached. At which point the heating elements are switched off
immediately, while the compressors are switched off in order, with a CO03 delay between each one.
In the event of domestic hot water probe 1 faulty (the domestic hot water regulation probe), the domestic hot
water function is stopped and disabled; the controller will regulate normally in chiller or heat pump mode.
In the event of domestic hot water probe 2 faulty (not involved in the regulation), the alarm is signalled
without affecting heat regulation in any way; domestic hot water will continue to be produced normally even if
the display probe is not working properly.
If there is an error with the heat regulation probe (for the chiller or heat pump) during production of domestic
hot water, the machine will continue to operate but the regulation of the chiller or heat pump is disabled and
domestic hot water continues to be produced.