OM-2245 / Operation and Maintenance Manual
ITW GSE 4400 / 400 Hz. Generator Set
March 15, 2015
Chapter 1-3
Page 3
CAUTION
To eliminate the possibility of wet stacking (See Appendix A), DO NOT allow the
engine to idle for long periods.
c)
Failed Starting Procedure
In the event that there is an error during initialization or if the engine fails to start after 3 attempts, the
display will show a fault. Diagnose and treat the reason for the fault, clear the fault, and press the
engine start button again.
d) Power Delivery
i)
After the engine has started and the display has changed to the output status default screen, any
of the output ON/OFF buttons can be pressed. If the unit is already at rated speed, the contactor
will immediately close. If at idle, the engine will ramp up to rated speed, the generator will set the
output voltage, then the contactor will close. The green LED will turn ON next to the active output.
In addition, current power status information will appear on the output status default screen.
WARNING
All output ON/OFF buttons are active regardless of the displayed screen.
ii)
Early in the power delivery run it is recommended that the operator check output voltage and
current in each of the three phases. Use
źŸ
push-buttons to view either the line-to-line or line-
to-neutral voltage. If the load is changing, observe the display until load conditions stabilize.
iii) A condition of over-voltage, under-voltage, under-frequency, over-frequency, or overload in the
output circuit will automatically open the load contactor and display a fault code to signal the
operator which of the above faults caused the protective monitor system to operate. After the
fault has been corrected, press the respective output push-button to reset the system. Proceed
with power delivery by pressing the same switch.
WARNING
NEVER
disconnect the output cable while power is being delivered. Output
contactor’s must be open prior to removal of the cable from the aircraft.
CAUTION
The generator set must be shut down so that the failed power delivery problems can
be diagnosed. Only trained or qualified personnel with this type of equipment should
work on this GPU.
e) Failed Power Delivery
If the contactor indicating light goes out and EF fault is shown on the display, this indicates that the
aircraft is not supplying the 28.5 VDC interlock signal to the plug interlock circuit. Correct the
condition and press the output push-button to reset the fault. Press the button again to close the
output contactor and provide 400Hz to the aircraft/load bank.
If the aircraft (or load bank) does not have the 28.5 VDC signal, set the
EF Bypass ON
through the
Setup icon menu.
