History; Principles Of Regulation; Regulating The Water Loop - Tecumseh INFINEE Manuel D'utilisation

4.2.2. History

A history of the last 64 events is managed using the list of active alarms.
This history remains in the memory even in the event of a power failure.
When the alarm has disappeared and has been acknowledged, it remains searchable simply by
pressing
And then by pressing
In this menu, the information is as follows:
• An alarm identification code
• The alarm registration number which corresponds to the order of appearance of alarms if there
are several, with No. 01 being the most recent
• The date and time the alarm appears
• A description of the alarm (on two lines)
• A recording is made at the onset of the alarm; in this case, the event line displays "Activated"
• A recording is made when the alarm disappears; in this case, the event line displays
"Deactivated"
• To facilitate the diagnosis, and depending on the type of alarm, additional information is stored
in the memory. This information is displayed on the last two lines.
It will be possible via a protected menu to reset the list of events (e.g. after commissioning,
maintenance etc.)

Principles of regulation

4.3.1. Regulating the water loop

The water loop is regulated following two PID-type control loops:
1. The first regulating loop controls the water temperature.
Regulation is carried out on the water return temperature.
This control loop controls the compressor during start/stop and frequency variation.
The setpoint is editable on the user interface.
2. The second control loop controls the temperature difference between the water inlet and
outlet.
This control loop controls the water circulation pump.
The delta T setpoint is editable on the user interface.
Version: 2020-01
Control User Manual
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INFINEE chillers
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