MAINTENANCE AND OPERATING MANUAL
Electronic controller
HAS T 070÷140
63
ENGLISH
EN
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.
The reserved menu submenus are described below. Access to each submenu depends on the level of the password utilised.
6.7.3 Configuration
The menu provides the facility to display the main features of the unit.
The icon indicates a parameter that cannot be edited from the display.
The configuration menu masks provide the facility to display the following information:
• range, model and version of unit
•type if refrigerant used
• presence of storage tank
• fans type and layout
• type of cycle inversion on unit, if refrigerant side or water side (water-water units)
• pumps present in unit and enabling of pump(s) in anti-freeze mode
• enabling of anti-freeze heater.
• heat recovery (if present) and enabling of pump-down function at compressors starting and stopping (service
level only) specifying whether to activate function always or only during chiller mode operation.
• enabling of defrost, free-cooling type, enabling display of electronic
thermostatic valves (if present) EEV for
operation in chiller and heat pump mode.
• enabling of modularity, enabling of supervision and active supervision (service level only), enabling of
special functions and access to SPECIAL FUNCTIONS menu (Ref. FS01-FS02) (manufacturer level only).
• enabling of unit remote start (in chiller/heat pump mode) by means of digital input
• procedure for default parameters installation. The installation of default values is possible only with the unit in
status.
Consult the following headings for more details on the functions described.
6.7.4 Compressors
The main operating parameters of the unit's compressors can be set up in the menu.
The menu is accessible via the service level password.
The masks of the unit compressors menu offer the facility to:
• disable each circuit present in the unit
• display, for each of the unit's compressors, a code that identifies the type and disable operation of an
individual compressor
•set up the rotation logic and type of balancing of the compressors and the circuits.
•set up the compressors starting time lag at the time of unit power-up
•set up the minimum running time and the stopped time of each compressor
• set up the time lags between consecutive starts of the same compressor and the delay between starts and
stops of different compressors.
• set up the time lag between starts of compressors during the defrost cycle
Modification of minimum compressor times is possible in status and only if the minimum compressor times are
terminated. With minimum times in progress, the icon is shown in the mask.
6.7.4.1Pump-down
You can set one or more of the following pump-down types:
• at start-up, the refrigerant solenoid valve opens and the first compressor in a circuit starts when evaporation
pressure exceeds a programmed setting
• at shut-down, the refrigerant solenoid valve closes and the last compressor in a circuit stops when evaporation
pressure falls below a programmed setting
In the event of an incorrect pump-down procedure an alarm appears on the display and will be reset automatically at the
time of the next correct start-up/shut-down.
6.7.4.2Disabling circuits and compressors
You can disable a circuit or an individual compressor from the display when it is necessary to control the capacity of the
unit or a circuit in order to reduce the cooling capacity.
6.7.4.3Rotating circuits and compressors
One of the following logic types can be set up:
• Compressors rotation logic: Fixed - FIFO - Balancing
• Circuits rotation logic: Fixed - FIFO - Balancing - Saturation
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