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15 MANAGEMENT OF DUAL SUPPLY
Units with management of dual supply with ATS (Automatic Transfer Switch) can be combined with a buffer battery module that
keeps the controller powered during automatic switch-over from one supply to the other.
The logic constantly monitors the supply of power between the G and G0 terminals of the controller, and the state of the contact
of the phase sequence relay.
When there is a mains power cut, the logic of the controller remains active because the buffer battery supplies power to the
controller.
At this point, the logic implements the following steps:
•
the unit is turned OFF due to an alarm;
•
tll the digital inputs are bypassed (except ID1 that detects the presence of power);
•
the alarms of the inverter (when applicable) are bypassed;
•
the safety times of the compressors are reset;
•
the alarm log and the BBX are bypassed;
These steps are carried out to then allow the unit to restart as soon as the mains power supply returns.
When the mains power supply returns, the controller is powered again between terminals G and G0, and the unit turns ON
again, ready to continue normal operation.
To do this, the logic does the following:
•
turns ON the unit;
•
activates reading of the status of the digital inputs;
•
activates management of inverter alarms;
•
activates management of the alarm log and BBX;
•
resets all the alarms 5 seconds after the power supply is restored;
•
the unit runs again according to the normal adjustment logic.
The icon
on the main mask indicates activation of dual supply.
16 EVENT AND MAINTENANCE MANAGEMENT
16.1 Origin of events
The events managed by the software fall into the following categories:
•
Events from external contact: when the contact switches from closed to open, an event is generated.
•
System events: events coming directly from the control board diagnostics routine.
•
Threshold events: events directly generated by the software as a result of thresholds that can either be fixed or set
from the user terminal.
16.2 Threshold events
INFORMATION:
The high/low temperature and high/low humidity alarms may occur even when the unit is turned off.
The parameters for enabling and configuring are in the "Settings" menu, which can be accessed by
entering the "Service" password.
The setpoint and differential parameters of the following events can be found under the "Settings" and "Settings2" menus,
which can be accessed by entering the "Service" password.
For the default values, see the parameters table.
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