4
Governors America Corp. © 2020 Copyright All Rights Reserved
ESD5500E Series Speed Control Unit 9-2020-F PIB1002
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
5
ADJUSTmENTS BEFORE ENgINE STARTUP
Make sure the following adjustments are set before starting the engine.
GAIN
Middle Position
STABILITY
Middle Position
SPEED TRIM CONTROL
Middle Position
STARTING FUEL
Full CW (MAX fuel)
SPEED RAMPING
Full CCW (fastest)
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.
5.000
(127)
Ø0.266
(6,6)
CW
*
SEE SPECIFIC ACTUATOR PUBLICATION FOR PROPER
WIRING OF ACTUATOR BASED ON BATTERY VOLTAGE
1.031
(26)
*
OPTIONAL ACTUATOR
CABLE SHIELDING TO
MEET CE DIRECTIVE
5.750
(146)
5.000
(127)
5.500
(140)
A B C D E F G H J
L M N P
ACTUATOR
PICK-UP
BATTERY
AUX
10V
OUTPUT
C1 OFF
ON
LEAD CIRCUIT
OFF
ON
C2
SOFT COUPLING
BATTERY
_
+
S1
FUSE
15A MAX
GROUND REFERENCE
ADD JUMPER FOR 12V
BATTERY OR ACTUATOR
CURRENTS ABOVE 5A
SPEED TRIM
CONTROL - 5K
K
CLOSE FOR DROOP
CLOSE FOR IDLE
ACTUATOR
MAGNETIC
PICK-UP
DROOP
IDLE
- +
CAUTION
ENGINE SPEED CONTROL
COMPONENT. WHEN INSTALLING
OR SERVICING REFER TO
PRODUCT PUBLICATION.
SPEED CONTROL UNIT
ACCESSORY POWER
SUPPLY
ACCESSORY INPUT
DROOP
IDLE
SPEED
E3
GAIN
STABILITY
SWITCH
PROFILE
SPEED
RAMPING
STARTING
FUEL
E2
E1
DEAD TIME
COMPENSATION
JUMPER
S/N :
MODEL:
GA C
OVERNORS
MERICA
ORP.
MADE IN AGAWAM, MA U.S.A.
ESD5500E
WD554
5.000
(127)
Ø0.266
(6,6)
CW
*
SEE SPECIFIC ACTUATOR PUBLICATION FOR PROPER
WIRING OF ACTUATOR BASED ON BATTERY VOLTAGE
1.031
(26)
*
OPTIONAL ACTUATOR
CABLE SHIELDING TO
MEET CE DIRECTIVE
5.750
(146)
5.000
(127)
5.500
(140)
A B C D E F G H J
L M N P
ACTUATOR
PICK-UP
BATTERY
AUX
10V
OUTPUT
C1 OFF
ON
LEAD CIRCUIT
OFF
ON
C2
SOFT COUPLING
BATTERY
_
+
S1
FUSE
15A MAX
GROUND REFERENCE
ADD JUMPER FOR 12V
BATTERY OR ACTUATOR
CURRENTS ABOVE 5A
SPEED TRIM
CONTROL - 5K
K
CLOSE FOR DROOP
CLOSE FOR IDLE
ACTUATOR
MAGNETIC
PICK-UP
DROOP
IDLE
- +
CAUTION
ENGINE SPEED CONTROL
COMPONENT. WHEN INSTALLING
OR SERVICING REFER TO
PRODUCT PUBLICATION.
SPEED CONTROL UNIT
ACCESSORY POWER
SUPPLY
ACCESSORY INPUT
DROOP
IDLE
SPEED
E3
GAIN
STABILITY
SWITCH
PROFILE
SPEED
RAMPING
STARTING
FUEL
E2
E1
DEAD TIME
COMPENSATION
JUMPER
S/N :
MODEL:
GA C
OVERNORS
MERICA
ORP.
MADE IN AGAWAM, MA U.S.A.
ESD5500E
WD554
Parameter
ProceDure
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.
Normally, adjustments made at no load achieve satisfac-
tory performance. If further performance improvements
are required, refer to Section 12 TROUBLESHOOTING.
note
5.000
(127)
Ø0.266
(6,6)
CW
*
SEE SPECIFIC ACTUATOR PUBLICATION FOR PROPER
WIRING OF ACTUATOR BASED ON BATTERY VOLTAGE
1.031
(26)
*
OPTIONAL ACTUATOR
CABLE SHIELDING TO
MEET CE DIRECTIVE
5.750
(146)
5.000
(127)
5.500
(140)
A B C D E F G H J
L M N P
ACTUATOR
PICK-UP
BATTERY
AUX
10V
OUTPUT
C1 OFF
ON
LEAD CIRCUIT
OFF
ON
C2
SOFT COUPLING
BATTERY
_
+
S1
FUSE
15A MAX
GROUND REFERENCE
ADD JUMPER FOR 12V
BATTERY OR ACTUATOR
CURRENTS ABOVE 5A
SPEED TRIM
CONTROL - 5K
K
CLOSE FOR DROOP
CLOSE FOR IDLE
ACTUATOR
MAGNETIC
PICK-UP
DROOP
IDLE
- +
CAUTION
ENGINE SPEED CONTROL
COMPONENT. WHEN INSTALLING
OR SERVICING REFER TO
PRODUCT PUBLICATION.
SPEED CONTROL UNIT
ACCESSORY POWER
SUPPLY
ACCESSORY INPUT
DROOP
IDLE
SPEED
E3
GAIN
STABILITY
SWITCH
PROFILE
SPEED
RAMPING
STARTING
FUEL
E2
E1
DEAD TIME
COMPENSATION
JUMPER
S/N :
MODEL:
GA C
OVERNORS
MERICA
ORP.
MADE IN AGAWAM, MA U.S.A.
ESD5500E
WD554
IMPORTANT:
Speed Adjustment Is a 25
Turn Potentiometer
