PROTECTIONS AGAINST ABNORMAL
CONDITIONS
Page 25
Switching on / off using the optional remote on / off Remote Control
An optional corded Remote Control Model, No. RC-15, is available to enable switching
on and off from a distance of 18 ft. The remote on / off control comes with 18 ft. of wire.
One end of the remote control is plugged into the 6 position modular jack (9) provided
on the inverter.
To use the remote control, the inverter is first required to be switched
on from the on / off switch on the front panel.
Now, the inverter can be toggled
between off / on conditions by pressing the push button on the remote control. The LED
on the remote control will light when the inverter is in the on condition
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.
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 20
) If the
voltage at the DC input terminals falls below 10.7 V for PST-150S-12A or 21.4 V for
PST-150S-24A, a buzzer alarm will be sounded. The green LED (3) will continue to be
lighted 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 PST-150S-
12A or 20 V for PST-150S-24A.
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 PST-150S-12A or 20 V for PST-
150S-24A. The green LED (3) will be switched off 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 PST-150S-12A or 23 V for PST-150S-24A.
