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AWZ333
9
RED LED:
twinkling – indicates failure status (Tab. 7)
GREEN LED:
illuminating – the PSU is supplied with 230V AC power,
correct operation
twinkling – no 230V AC power, battery-assisted operation
3. Operating status indication.
The power supply unit features LED and acoustic status indication. PSU status can be remote-controlled by two
technical outputs.
3.1 LED indication
3.2 Technical output:
Table 7
number of LED
flashes FAILURE
Fault type
Fault cause
Notes
1
broken battery
the battery is not fully charged, the
battery is not connected,
burnt battery fuse
check the connections and the
battery fuse
2
discharged battery
indicates battery voltage drop
below 10V
during battery-assisted operation
disconnection
3
too low output voltage
U < 10V
output overload
remove the cause,
disconnect the load and connect
after 30-60 s
4
too high output voltage
Uout > 14.5V
damaged voltage regulator,
wrong setting of the P1
potentiometer
check the setting of the P1
potentiometer
5
PSU overheat
temperature of the PCB board
>120°C
check the load balance,
ensure the enclosure ventilation
6
over voltage
protection
Uout > 17 V
damaged voltage regulator
high-voltage
diode is illuminated
3.2 Acoustic indication.
Emergency situations are acoustically indicated by a buzzer. The frequency and the number of signals
depend on a fault type (Tab.8). The acoustic indication is off after removing the
ZB
jumper.
Table 8
Nr
Description
Situation
1
1 signal per 8s
battery-assisted operation, no 230V AC supply
2
1 signal per 16s
undercharged battery, no battery during mains
operation,
burnt battery fuse
3
quick signals lasting for 3s
PSU restart
4
12 signals
finishing the battery test
5
3 signals
initiating the battery test
6
continuous indication
failure, indicated type: RED DIODE
