15
3 x LED
Binär Code Beschreibung/
Binary code Description
0 0 1
Dauerhafter Überstrom /
Continuous overcurrent
0 1 0
Defekte Funkenstrecke /
Faulty spark gap
0 1 1
Elektronikfehler /
Electronic failure
1 0 0
Niedrige Batteriespannung /
Low battery voltage
1 0 1
DC Spannungsfehler / DC
Voltage failure
1 1 0
Fehler Leistungselektronik / Faulty power electronics
Fehlerzustände /
Failure modes:
Fehlerzustand
(Binärcode: Aus = 0, Rot =1,
s. Tabelle für Fehlerbeschreibung)
Failure Mode
(binary Code: Off = 0, Red =1,
see table for failure modes)
3 x LED
Binär Code Besch
Binary code Descri
0 0 1
Dauerh
Fehlerzustände /
Failu
Fehlerzus
s. Tab
Failure M
see ta
Functional example
Fig. 4.3.1 Fault states
4.3 Failure mode
4.3.1 Fault states
Possible fault states are binary coded (dual system 0/1) and displayed or assigned accordingly via the three
failure mode LEDs.
- Red flashing
LED
stands for binary code 1
- Non-flashing
LED
stands for binary code 0
(see Fig. 4.3.1).
The failure mode LEDs are arranged vertically in the housing respectively on the cover. Binary evaluation is
performed by means of the place holders on the right side of the LEDs (see Fig. 4.3.1).
Example:
The top
LED
does not light up
stands for binary code 0
The centre
LED
does not light up
stands for binary code 0
The lower
LED
lights up red
stands for binary code 1
This leads to a binary code of 0 0 1.
According to the binary code table, the fault state
”Permanent overcurrent”
is present (see Fig. 4.3.1).
Diagnosis / fault analysis
A more exact analysis of the relevant fault states and possible corrective actions can be found in Table 1
“Diagnosis / Fault analysis” on page 23.
Note
The failure mode LEDs are only supplied by the 9 V block battery or the external power supply!
There fore, they should be regularly checked or maintained! This means that it has to
be checked whether the contact of Digital OUT is open if no LED lights up to exclude that
the battery is completely discharged! (contact closed => Device is in the failure mode and the
battery is empty if no LED lights up!)