SAUTER flexotron®400 - RDT410
Alarm handling
P100012103
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8
Alarm handling
If there are any active, unacknowledged alarms, the alarm indicator in the Base
Display will light up and start flashing. If DO1 is configured as alarm output, it will
be activated. The alarm handling menus are accessed from the Base Display by
a click on the encoder knob. The first alarm is displayed.
There are four different alarm types:
AL1
Frost protection alarm. The frost protection temperature has fallen below
+7°C
AL2
High temperature limit switch activated.
AL3
Fan indication alarm. Either there is no fan indication input on DI1 when
the fan start output, DO3 is active or DI1 is active although there is no fan
start signal on DO3. The fan alarm has a 30 second delay.
AL4
Sensor error. A sensor input is open circuit.
A symbol shows which type of alarm it is. Snowflake for frost protection, sun for
high temperature limit switch, a fan for fan indicator and the input symbol for
sensor error.
If there are multiple alarms, twist the knob to scroll through them. To
acknowledge an alarm, click the knob to enter change mode. Then twist it to
change No to Yes and click to acknowledge.
An alarm will remain on the alarm list until it is both acknowledged and has reset.
The alarm indicator in the Base Display will remain lit until the alarm list is empty.
However, it will only continue to flash as long as there are unacknowledged
alarms in the list. Thereafter it will remain steadily lit until all alarms have reset. If
DO1 is used as alarm output it will remain activated as long as there are
unacknowledged alarms in the alarm list. DO1 cannot be used as an alarm
output when 3-point control has been selected.
