EVCO c-pro mega RACK - Manual (Page 100)

C-PRO MEGA RACK & C-PRO GIGA RACK APPLICATION MANUAL
Page 100
7 DIAGNOSTICS
The application is capable of managing a series of alarms relating to the system compressors, fans,
circuits and functions. Based on the various alarm types, it is possible to configure resets (manual or
automatic), possible signalling delays and the actions to be executed in specific cases.
When several alarms are active, display LED L0 flashes (even with the machine off) and the buzzer
sounds if the machine is switched on.
In order to view the alarm pages, press and hold key K0 for approx. 2 seconds.
To scroll through the active alarms, simply press the ENTER key, the alarms are shown in order of
priority, just as they are listed in the alarm table in section 7.2.
All alarms are monitored, even with the machine switched off, hence, even with the machine off, by
using the K0 key, it is possible to view the active alarms, and LED L0 flashes. The buzzer (if
parameter enabled) only sounds when the machine is on.
The alarms may only be managed by one of the two interfaces, exclusively. Once the alarm pages
have been entered, the controller only accepts commands from the device that initiated the
procedure. In any case, the pages are shown simultaneously on both displays.
To inform the user that alarm pages are being displayed on one of the two interfaces, the L0 LED
flashes rapidly.
To exit from management of one view and move to another, exit from the alarm pages: press the
ESC key, or this will occur after 60 seconds if no other keys have been pressed.
Exiting an alarm page by pressing the ESC key, or by waiting 60 seconds for timeout, returns the
user to the main page of the application.
All digital inputs relating to alarms are managed by the parameter Alarm DI logic (PH17) which
assumes the following significance:
⋅
If set to “NO”, the inputs will normally be de-energised (open): N.O. logic
⋅
If set to “NC”, the inputs will normally be energised (closed): N.C. logic
7.1 Manual and automatic alarms
The program is capable of managing two types of alarms, those that are manually reset, and those
that are automatically reset. Certain alarms have the possibility for setting, by means of a parameter
(alarm reset), the type of reset best suited to the user’s needs.
7.1.1 Manual alarms
In the case where a manual alarm occurs:
⋅
LED L0 begins flashing
⋅
the buzzer begins to sound at a high frequency (if the machine is on)
Pressing and holding the K0 key for approx. 2 seconds enters the description page for the active
alarm.
Once the conditions responsible for causing the alarm are resolved it is possible to manually reset
the alarm. To do this:
⋅
go to the page for the alarm to be reset
⋅
press and hold the ENTER key for approx. 2 seconds.