MAINTENANCE AND OPERATING MANUAL
Electronic controller
HAS T 070÷140
74
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.
• Cycle inversion valves/water-side 3-way cycle inversion valves
• Fans (step or speed controlled)
• Free-cooling (3-way valves, fans)
During the manual procedures the alarms are always enabled.
6.7.12 Alarms set
The unit's alarm settings can be edited in the menu.
The menu is accessible only via the service level password.
The following operations are possible from the alarms set menu:
• define the setpoints and trip delays of the high and low temperature alarms for all the probes enabled on the
unit
• define the setpoints, differentials, and trip delays of the high and low pressure alarms for all the transducers
present on the unit
• disable the low pressure alarm during the defrost procedure
• change the settings for the water differential, tank level, phase monitor, and compressor oil level alarms, if
enabled
6.7.13 Log
The menu contains records of the operating parameters, saved at the time of tripping of an alarm.
The information is recorded in the two following logs:
• Alarms log
•Power log
6.7.13.1Alarms log
The information in the log is as follows:
• Date and time of the alarm
• Description and code of the alarm
• Temperature/pressure readings of all enabled probes
• Status of unit's solenoid valves
6.7.13.2Power log
In the presence of a power alarm (phase-monitor) the system records the date/time of alarm tripping and reset.
The log files can be reset by accessing the menu using the manufacturer or service level password, when the unit is off.
6.7.14 Pumps
The parameters for management of the pumps can be defined in the menu.
The menu is accessible exclusively by means of the service level password and with at least one pump installed in the unit.
The masks of the pumps menu offer the facility to:
• set the time lag between stopping of a pump and shut-down of the unit
• set the rotation interval between pumps and the duration of simultaneous operation
• set the pumps rotation interval (with time rotation enabled)
• set the operating pump (with manual rotation enabled)
The number of pumps present in the unit is shown in the configuration menu.
When the unit is powered up the enabled pump is started. When the unit is shut down, the pump continues to run for a time
period settable on the display.
6.7.14.1Pumps rotation
The pumps rotation logic is as follows:
• Manual: the pump to be started can be selected on the display
• By starts: at each unit start-up a different pump is started with respect to the pump that was running at the last
shut-down
• By time: after exceeding a preset number of operating hours of a pump, the other pump starts running
• By starts and time: combination of the above two logics
In the event of an overload alarm on the pump that is currently running, the other pump cuts in automatically.
The active pump is stopped after the unit is shut down with a parametrized delay which, in the case of an alarm, is not
observed.
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