Owners Manual

Component Identification and
Description of Operation
IT SERIES Industrial True Sine Wave Inverter Owners Manual
13
(4) Auto Throttle Indicator Light (Volt Guard Feature)
(see also item (32.3) Terminal 6 Auto Throttle Control Terminal)
Light Display
Description
Green Light is ON The Auto Throttle Signal (ground signal) is ON due to battery voltage
remaining below 12.6 (25.2) volts for 15 seconds. The Indicator Light and
the Auto Throttle Signal will remain ON until battery voltage remains above
13.8 (27.0) volts for 15 seconds. The indicator light will also remain ON at
full load output.
The
Volt Guard Feature
is designed to control an automatic throttle on vehicles where the inverter
is required to operate continuous, heavy AC loads. By controlling the auto throttle the Volt Guard
Feature will insure that the vehicle’s alternator operates at maximum output when needed.
The Volt Guard circuit is designed to provide ‘ground control’ for a Bosch relay, Vanner part number
05235 or equal. Use the Bosch relay to operate the automatic throttle, Vanner 73-46 Automatic
Throttle or equal. See Figure 5 for details and Figure 7 for a schematic diagram.
(5) Low Battery Warning Indicator Light (Low DC Warning)
Light Display
Description
Yellow Light is ON The inverter is ON and battery voltage has decreased to less than 11 (22)
volts DC. Automatic inverter shutdown for low battery at 10.5 (21) volts is
imminent unless the battery voltage is increased.
(6) Overload Indicator Light
Light Display
Description
Solid Red The inverter is ON but the inverter’s AC output circuitry is sensing an
overload condition. If the AC load is not reduced, the inverter will shut itself
OFF after approximately 12 seconds.
Blinking Red The inverter has shut itself OFF due to overload. The Inverter ON/OFF
Switch must be cycled to reset and restart the inverter.
(7) Over Temperature Indicator Light
Light Display
Description
Blinking Red The inverter has shut itself OFF due to over temperature. The Inverter
ON/OFF Switch must be cycled to reset and restart the inverter.
(8) Low Battery Shut Down Indicator Light (Low DC)
Light Display
Description
Blinking Red Battery voltage has fallen below 10.5 volts (21 volts) and the inverter has
shut itself OFF. The Inverter ON/OFF Switch must be cycled to reset and
restart the inverter.
(9) ON/OFF Switch (and RESET Switch)
The ON/OFF Switch is a two-position rocker switch used to turn the inverter ON/OFF and is used
as a RESET Switch. When the inverter has automatically shut itself OFF due to a fault, the inverter
must be RESET by turning the ON/OFF Switch OFF or by turning a remote switch OFF. (If an
automatic shutdown has occurred due to a fault, one of the fault indicator lights will be displayed
until the inverter is RESET.