Sauter flexotron®800
ventilation
Functional description
P100012082
52
5.7
Extended running and External switch
The digital inputs for extended running can be used to force the unit to start although
the timer says the running mode should be
‘‘Off’’. Normal running always takes
precedence over reduced speed. "Extended activ. Normal" takes precedence over the
timer output for reduced speed.
For 2-speed fans and pressure/flow controlled fans there are inputs for normal speed
and reduced speed. The unit will run for the set time. If the running time is set to 0 the
unit will only run as long as the digital input is closed.
The signal
’’External switch’’ will stop the unit, even if the timer or one of the signals
"Extended activ. Normal" or "Extended activ. Reduced" says it should stay in running
mode.
In- and outputs
DI
Extended activ. normal
DI
Extended activ. reduced
DI
External switch
5.8
Time-switch outputs
Up to five digital time-switch outputs can be configured. Each timer channel has a
separate scheduler with two periods per week-day.
Timer output five can be used to control the function Recirculation. See 5.1.11.
In- and outputs
DO
Extra time channel 1
DO
Extra time channel 2
DO
Extra time channel 3
DO
Extra time channel 4
DO
Extra time channel 5
5.9
Alarms
Alarm handling
Alarms are indicated by the red alarm-LED or on the front of the external display.
All alarms can be monitored, acknowledged and blocked using the display and buttons.
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-alarms or both
A- and B alarms. C-alarms are internal alarms which are not forwarded. 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.
