ICS iC 520 - Anti-Freeze Pump Management (if Ambient Probe Is Installed); Modbus; Automatic Restart; Parameters Description-Settings

OPERATING AND MAINTENANCE MANUAL
Chapter 7 - Electronic controller
iC 215 ÷ iC 780
50
The data in this manual are not binding and they can be modified by the manufacturer without notice. Reproduction of this manual is strictly prohibited
ENGLISH
EN
7.19 Anti-freeze pump management (if ambient probe is
installed)
The pumps installed in the unit can be started in anti-freeze mode to prevent the formation of ice in the unit’s hydraulic
circuit. If the unit is powered off and the selected reference temperature is below the programmed setpoint, one of the pumps
is started. The pump is stopped if the temperature increases above the setpoint + differential, in accordance with the
following diagram:
7.20 ModBus
The supervision system provides the facility to monitor and act on certain of the unit’s parameters by means of a remote
device using the RS485 port. The MODBUS communication mode for the controller features the following characteristics:
Baud Rate = 9600 bps
Data Bit = 8 bit
Parity = None
Stop Bit = 1
Start/stop= 4milliseconds of silence (approximately 3 characters)
Minimum time-out = 500 ms
For further information refer to the specific manual.
7.21 Automatic restart
In case of a power loss, when power is restored the unit will be ON if it was ON at the time of power loss, and OFF if it was
OFF.
7.22 Parameters description-settings
The following is a list of all the programmable parameters complete with their associated access levels.
U= User level
ATTENTION
Ensure these instructions are observed in full to avoid incorrect operation of the unit.
7.22.1 Description of parameters
Parameter Level Description Min. Max. UM Resolution
Thermoregulator
ST01 U Chiller setpoint.
Enables setting of the working setpoint in chiller mode.
ST02 ST03 °C Dec
ST02 U Chiller minimum set.
Establishes the minimum limit that can be utilised to set the
chiller working setpoint.
-50.0 ST01 °C Dec
ST07 U Control steps activation band in chiller mode. 0.1 25.0 °C Dec
Pr1 U User password 0 999
Display message
Forced display message
Remote terminals display forced presentation
Display presentation in STD-BY
Pr1 U User password 0 999
Unit
Compressors
Analogue inputs
Probes offset
Digital inputs
Pump status
ON
OFF
Ar27
Pb5 (BAT)
Ar26