Corrigo ventilation 3.4 manu

52 Chapter 5 Functional description Manual Corrigo Ventilation, revision R
Alarm priorities
Alarms can be given different priority levels, A-alarm, B-alarm, C-alarm or not active. Digital
outputs can be bound to act as alarm outputs for A-alarms or B/C-alarms or both A- and B/C alarms.
The digital outputs can be inverted, so that an inoperative alarm gives a high output and vice versa.
A- and B-alarms must be acknowledged to reset. C-alarms automatically reset as soon as there is no
longer a cause for alarm.
Stop function
For each alarm there is the possibility of choosing whether activated alarm should stop control or
not. Automatic restart will take place after removal of the alarm cause and the alarm has been
acknowledged.
For some alarm types such as electric heating high temperature limit and water heating frost
protection it would be dangerous to not stop the unit on alarm. Therefore, for such alarm types, the
program will always reset the stop function to "Active" even if the operator should choose
"Inactive".
Unfortunately it is not possible to remove the display text concerning the stop function for these
alarm types. This since the available program space demands that all alarms are treated in the same
way in the display.
Note: For alarms that have been set to "Inactive", the extra stop function should also be set to
"Inactive", or unexpected malfunctions may occur.
Alarm text
The alarm text that should be shown in the display when there is an alarm can be changed using E
tool
©
. For more information, see the E tool
©
manual.
In- and outputs
DO
Sum alarm A + B + C
DO
Sum alarm A
DO
Sum alarm B/C
External alarms
There are 11 possible external alarms: One digital input entitled ”External Alarm” and 10 digital
inputs called ”Extra alarm”.