Samlex Europe PST-15S-12E Owner's Manual - page 25
No load draw (idle current)
When the on / off switch is turned on, all the circuitry inside the inverter becomes alive
and the AC output is made available. In this condition, even when no load is being supplied
(or, if a load is connected but has been switched off), the inverter draws a small amount
of current from the batteries to keep the circuitry alive and ready to deliver the required
power on demand. This is called the idle current or the no load draw. Hence, when the
load is not required to be operated, turn off the on / off switch on the inverter to prevent
unnecessary current drain from the battery.
PROTECTIONS AGAINST ABNORMAL CONDITIONS
The inverter has been provided with protections detailed below.
Low DC input voltage warning alarm.
The voltage at the DC input terminals will be lower
than the voltage at the battery terminals due to the voltage drop in the battery cables and
connectors. The drop in the voltage at the DC input terminals of the inverter could be due
to lower battery voltage or due to abnormally high drop in the cables if the cables are not
thick enough (Please read under
“Installation – Connection from the batteries to the
DC input side of the inverter – cable and fuse sizes” on page 19)
If the voltage at the
DC input terminals falls below 10.5 V for 12V version or 21 V for 24V version, a buzzer
alarm will be sounded. The LED (2) will continue to be green and the AC output voltage
will continue to be available. This warning buzzer alarm indicates that the battery is
running low and that the inverter will be shut down after sometime if the voltage at the
inverter terminals further drops to 10 V for 12 V version or 20 V 24 V version.
Shut-down due to low DC input voltage.
If the inverter continues to
power the load after the low DC input voltage buzzer alarm is sounded, it will shut down
temporarily when the DC input voltage further drops below 10 V for 12 V version or 20 V
for 24 V version. The LED (2) will turn orange and there will be no AC output voltage.
The buzzer alarm will continue to sound.
The unit will reset automatically when the
voltage of the battery rises to 11.5 V for 12 V version or 23 V for 24 V version .
Shut-down due to high DC input voltage.
If the voltage at the DC input terminals
exceeds 16.5 V for 12 V version or 33 V for 24 V version, the inverter will be shut down
temporarily. The LED (2) will turn orange and there will be no AC output.
The buzzer will be sounded.
The unit will be reset automatically when the voltage
drops down to 16.7 +/-0.2 V for 12 V version or 33.5 V +/-0.2 for 24 V version .
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