EVCO c-pro nano CHIL - Manual (Page 134)

C-PRO NANO CHIL AND C-PRO MICRO CHIL – APPLICATION MANUAL
Pag. 134
7 DIAGNOSTICS
The application is capable of managing a whole series of alarms, relating to compressors, fans,
circuits and plant functions. Depending on the various alarm types, it is possible to configure their
resetting (whether manual or automatic), a possible notification delay and any actions to be taken in
that specific case.
When one or more alarms are active, the alarm icon flashes on displays.
In order to view the various alarms, the “Alar” menu must be displayed from the main page, using
the ESC key, followed by the ENTER key. By pressing the ESC key from an alarm page, or waiting
for the 60-second timeout, the user is brought back to the application’s main page.
To scroll the various active alarms, the ENTER key must be pressed once more: alarms are listed in
order of priority, just as they are listed in the Alarm Table of chapter 7.2.
All digital inputs relating to alarms are managed by an Alarm Logic parameter, which takes on the
following significance:
⋅
If set to “NO”, inputs will normally be de-energised (i.e. open): N.O. logic;
⋅
If set to “NC”, inputs will normally be energised (i.e. closed): N.C. logic.
7.1 Manual and Automatic Alarms
There are two types of alarms: those that are manually reset and those that are automatically reset.
These alarms offer the end-user the choice of selecting, via the associated parameter, the resetting
mode that better reflects the user’s own requirements.
7.1.1 Manual-reset alarms
When a manual-reset alarm is triggered:
⋅
The alarm icon starts flashing.
By pressing the ENTER key from the “Alar” menu, the code of the first active alarm is displayed.
Once the conditions which had triggered the alarm are back to normal, the alarm can be manually
reset. To carry out this operation:
⋅
Go to the page of the alarm to be reset;
⋅
Hold the ENTER key pressed down for about 2 seconds.
At this point, in the absence of any further alarms, the page showing “none” is displayed, the alarm
icon is switched OFF, and the machine goes back to normal operation; otherwise, the code relating
to the next active alarm will be displayed.
The consequences deriving from an active manual-reset alarm remain valid as long as the user does
not take care of deleting the alarm message.
7.1.2 Automatic-reset alarms
When an auto-reset alarm is triggered:
⋅
The alarm icon starts flashing.
By pressing the ENTER key from the “Alar” menu, the code of the first active alarm is displayed.
Once the conditions that had triggered the alarm are back to normal, resetting and deletion of the
alarm message automatically take place, without any need for user intervention.
The consequences deriving from an active auto-reset alarm remain valid as long as the causes that
triggered the alarm are not reset.