ITW GSE 4400, Руководство пользователя

Страница: 100 / 213

OM-2245 / Operation and Maintenance Manual
ITW GSE 4400 / 400 Hz. Generator Set
March 15, 2015 Chapter 2-4
Page 2
6) Engine Troubleshooting
When troubleshooting the engine, remember that the ability of the engine to start and run properly
depends upon the following:
x
An adequate supply of 24 VDC power reaching a good starter and control board.
x
An adequate supply of air, compressed to a sufficiently high pressure
x
The injection of the correct amount of clean fuel at the proper time
7) GPU Control Monitoring
The GPU control system performs complete diagnostic testing and continuous monitoring of all critical
circuits and operating electrical values. If the control system senses a problem with one of the circuits or
if any of the electrical values exceeds its safe operating limit, the control system will shut the GPU down,
or may allow the GPU to continue operation depending on the severity of the condition.
a) Operating Modes
(1) Self-Test Mode
When power is first applied to the control circuit, the GPU performs complete self-diagnostics of
the internal circuitry. If a fault is detected during the self-test, the Alert/Failure LED will be lit and the
first (if there are more than one) failure will be displayed on the LED display.
(2) Engine Run Mode
When the ENGINE pushbutton is activated, the engine’s starter and the engine’s ECM will be
energized. After the engine reaches its rated speed (2000 rpm) the GPU is ready to supply power to
the aircraft.
(3) Engine Shutdown Mode
When shutting the GPU down, pressing the ENGINE pushbutton starts the 5 minutes delayed
shutdown period. The display will show “Idle Mode” and the engine returns to idle speed. The
shutdown period is required to cool the engine’s turbocharger.
(4) Engine Stop Mode
After the 5 minutes delayed shutdown period, the engine stops running.
(5) System Off Mode
The power is removed from the GPU’s entire control system when the battery disconnect is opened.
b) Faults
Faults result when any of the fault limits are exceeded, when an internal problem occurs, or under
certain conditions that would cause injury to personnel or damage to an aircraft or the GPU. Faults
are also stored in the Black Box memory as event records. (See Chapter 1-3 Paragraph 4.0.3) The
fault limits and conditions are preset at the factory.