GAC ESD5500E Series Manual - Página 4

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GAC ESD5500E Series Manual
5
ADJUSTmENTS BEFORE ENgINE STARTUP
Make sure the following adjustments are set before starting the engine.
GAIN
STABILITY
SPEED TRIM CONTROL
STARTING FUEL
SPEED RAMPING
6
START ThE ENgINE
The speed control unit governed speed setting is factory set at approximately engine idle speed. (1000 Hz., speed sensor signal or 600 RPM)
If the engine does not start, adjustment of the speed potentiometer may be required.
Crank the engine with DC power applied to the governor system. The actuator will energize to the maximum fuel position until the engine
starts. The governor system should control the engine at a low idle speed. If the engine is unstable after starting, refer to Section 8 ADJUST-
ING FOR STABILITY.
7
gOvERNOR SPEED SETTINg
The governed speed set point is increased by clockwise rotation of the
SPEED adjustment control. Remote speed adjustment can be obtained
with an optional 5 kΩ Speed Trim Control potentiometer.
8
ADJUSTINg FOR STABIlITy
Once the engine is running at operating speed and at no load, the
following governor performance adjustments can be made to increase
engine stability.
Normally, adjustments made at no load achieve satisfac-
note
tory performance. If further performance improvements
are required, refer to Section 12 TROUBLESHOOTING.
Parameter
GAIN
1.
Rotate the GAIN adjustment clockwise until instability develops.
2.
Gradually move the adjustment counterclockwise (CCW) until stability returns.
3.
Move the adjustment one division further counterclockwise to ensure stable performance (270° potentiometer).
4.
If instability persists, adjust the next parameter.
STABILITY
Follow the same adjustment procedure, steps 1 - 3, as the GAIN parameter.
Middle Position
Middle Position
Middle Position
Full CW (MAX fuel)
Full CCW (fastest)
IMPORTANT:
Speed Adjustment Is a 25
Turn Potentiometer
ProceDure
4
ESD5500E Series Speed Control Unit 2-2021-F2 PIB1002
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