Novar 1xxx KMB systems
37
Capacitive sections are shown as positive, inductive sections as negative values. If a section’s current
is not known (for example because of successful completion of the automatic section power
recognition process), the ---- value is shown. In such an event, as well as in the event of section
current zero value, the controller does not use the corresponding control output.
The controller is shipped with default setting of the automatic section power recognition process
enabled (parameter 20 set to A). The automatic section power recognition process is started on
introducing the power supply voltage, and after the process is complete, you can check or edit the
recognized currents in the side branch of parameter 25.
Each section’s nominal power can be changed even if it has been entered manually using the
switching program and smallest capacitor current (parameters 21, 22).
If a section’s value is shown with a flashing decimal point, it means:
• decimal point flashing slowly (about once a second), the section has not been accurized yet –
see description of the mechanism to accurize sections in the relevant chapter further below
• decimal point flashing fast (about three times a second), the section has been disabled and the
controller is not using it – see description of the mechanism to section disablement in the
relevant chapter further below
If you change the U
NOM
value (parameter 18), the controller will keep the actual section power value
(for example from the latest automatic section power recognition process), only their displayed
nominal value, reflecting the changes to U
NOM
, will change.
4.1.17 Parameter 26 – Fixed Sections, Switching Cooling and Heating, Alarm
Any controller output can be set as fixed. In such a situation the output is permanently connected or
disconnected. The two highest outputs can further be used to switch cooling and heating, and in case
of Novar 10xx models for alarm signalling too. The controller does not use sections set up this way for
power factor control.
4.1.17.1 Fixed Sections
A fixed output maintains its preset condition (that is connected or disconnected) with the following
exceptions:
• the controller is switched to the Manual mode
• a selected nonstandard condition occurs while the alarm’s corresponding actuation
function has been set (for details see alarm description further below)
A fixed section (one set as permanently connected) is only disconnected if the alarm has been
activated because of crossing over the threshold level of the quantity selected for a specified time (for
details see description of alarm functions further below).
By default all controller’s outputs are set as controlled, not fixed. In such an event they are shown for
example as follows:
01-C
01-C01-C
01-C.... output 1 is controlled and it is a capacitive section (capacitor)
12-L
12-L12-L
12-L.... output 12 is controlled and it is an inductive section (choke)
Each section’s value can be set to 0
00
0 or 1
11
1, that is 01-0
01-0 01-0
01-0 or 01-1
01-101-1
01-1, respectively, is displayed
and the corresponding output becomes a fixed one – it stays permanently disconnected or
permanently connected.
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