OM-2245 / Operation and Maintenance Manual
ITW GSE 4400 / 400 Hz. Generator Set
March 15, 2015
Chapter 1-3
Page 18
Go into the Setup Menu and then scroll up or down to the Unit of Measu
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Press the LEFT arrow button to exit the submenu and return to the submenu list.
4.17
28V Voltage
This Setup submenu allows the 28 volt output to be adjusted between 19.0 VDC and 33.0 VDC using the
UP and DOWN navigation buttons. (Please note that the acceptable voltage range for all commercial DC
powered aircraft is 26V to 29V.
Enter the Setup Menu and then scroll up or down to the ARU Voltage
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the LEFT arrow button to exit the submenu and return to the submenu list.
4.18
28V Compensation
DC voltage drops quickly as the current increases over a given length of cable. This Setup submenu
allows the 28 volt output to be automatically adjusted as the load increases. The allowed setting is
between 0.0 and 3.0 VDC at the rated continuous load of the unit. Note that the maximum output voltage
of the unit is 33 VDC.
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the up or down arrow buttons to change the selection.
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Press the LEFT arrow button to exit the submenu and return to the submenu list.
4.19
28V Current Limit
If too much current is supplied to an engine, it is possible for the engine to shear the engines propeller
shaft. This Setup submenu is used to set the default limit for the amount of current that the 28 VDC
module will supply to start the aircrafts engine. Typically this value is set to the maximum current of the
smallest aircraft the unit will service. If more current is required for larger aircraft, then the operator can
adjust the current limit using the RIGHT and LEFT navigation buttons when the diesel is running, the
28VDC ARU is NOT on and the “default” operator screen is displayed. The current limit settings are from
200 amps to 1600 amps for the 400 amp version of the unit and from 400 amps to 2400 amps for the 600
amp version.
To change the default current limit setting, enter the Setup Menu and then scroll up or down to the 28V
Current Limit s
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again to allow the value to be changed. Press the up or down arrow buttons to change the selection.
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button to exit the submenu and
return to the submenu list.
4.20
Diagnostic Mode