GAC EEG6550 Series User manual

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EEG6550 Enhanced Electronic Governor 5-2020-A1 PIB1118
EEG6550
Enhanced Electronic Governor
2SPECIFICATIONS
With Quikset Display
1INTRODUCTION
PERFORMANCE
Isochronous Operation ± 0.25 %
Speed Range / Governor
100 Hz - 12 KHz
(200-6000 RPM
w/120 tooth ywheel) cont.
Idle Adjust Up to1500 RPM
Droop Range 1 - 25 % regulation
Speed Trim Programmable ±120 Hz
INPUT / OUTPUT
Supply 12-24 V DC Battery Systems
(6.0 to 32 V DC)
Polarity Negative Ground (Case isolated)
Power Consumption 200 mA MAx continuous
plus actuator current
Speed Sensor Signal 1.0 - 60.0 V RMS
Actuator Current 8-10 Amps Continuous,
Momentary 12A MAx.
PWM output constant 500 Hz
Load Share/
Synchronizer Input 0-10 V DC (5 V nominal,
reversed polarity, 145 Hz / V )
Reverse Power Protection Yes
Transient Voltage Protection 60 V
GAC’s EEG6550 Series digital governor is designed to regulate engine
speed on diesel and gasoline reciprocating engines. With exibility, pre-
cision, and accurate control of governed speed, the EEG is designed
for industrial engine applications from generator sets and mechanical
drives, to pumps or compressors.
The EEG6500 Series Quikset Display allows its operator to monitor and
congure parameters without needing conguration software or a PC.
◊ Improved, simple LCD User Interface
◊ Fast setup with 5 pushbuttons, no potentiometers
◊ Rated, Idle Speed, and Variable Speed
◊ Selectable Isochronous, Droop, & Variable Governing
◊ Built-In Fault Protection With Overcurrent Sensing
◊ Adjustable Starting Fuel Strategy (Black Smoke Reduction)
◊ Extended Speed Range to 12KHz or 6000 RPM with Frequency
Display
◊ Speed Ramping (Idle to Rated or any Speed Setting)
◊ Includes Standard GAC AUx Input for Synchronizing and Load
Sharing
◊ J1939 Engine Data and Speed Output
◊ Overspeed Sensing & Protection
◊ Compatible with all GAC actuators except ADB335 and ACB2001.
ENVIRONMENTAL
Ambient Temperature -40° to 85 °C (-40 to 185 °F)
Relative Humidity up to 90 %
All Surface Finishes Fungus Proof and Corrosion Resistant
PHYSICAL
Dimension See Section 3 , Installation
Weight 1.8 lbf (820 gf)
Mounting Any position, Vertical Preferred
RELIABILITY
Vibration 7 g, 10-2000 Hz
Shock 20 g Peak
Testing 100 % Functional Test
COMPLIANCE / STANDARDS
Agency CE, (EN55011, EN50081-2
and EN50082-2)
Communications SAE J1939 (Optional)

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EEG6550 Enhanced Electronic Governor 5-2020-A1 PIB1118
3INSTALLATION
Mount in a cabinet, engine en-
closure, or sealed metal box.
Vertical orientation allows for
the draining of uids in moist
environments.
Avoid Extreme Heat
[mm]
in
Dimensions:
• Use an overspeed shutdown device, independent of the governor system, to prevent loss of engine
control which may cause personal injury or equipment damage.
• Do not rely exclusively on the governor system electric actuator to prevent overspeed. A secondary
shuto󰀨 device, such as a fuel solenoid must be used.

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EEG6550 Enhanced Electronic Governor 5-2020-A1 PIB1118
4WIRING
A DCB E F N P
Actuator
Battery
- +
Magnetic
Speed
Pickup
Fuse 15A Max
Ground to Case
(12V or 24V)
A NDCB E HGF LKJ M PA NDCB E HGF LKJ M P
CAN J1939
( Optional )
Accessory
Input
Droop
Idle
Variable Speed / Trim
Potentiometer 120 Ohms
( End of CAN bus)
Ground to
Case
Ground to
Case
5KΩ
COM
VSPD
TERMINAL DEFINITION GAUGE / mm2NOTES
AActuator (+) 16 / 1.31
BActuator (-) 16 / 1.31
CMagnetic Pickup (+) 20 / 0.52 * Twisted wires 14 turns per foot. 0.02in (.51mm) gap between sensor and gear teeth.
DMagnetic Pickup (-) 20 / 0.52
EBattery (-) 16 / 1.31
FBattery (+) 16 / 1.31 A 15 amp fuse must be installed in the positive battery lead to protect against any over-
load or short circuit
GSpeed Switch (SSW)Speed switch relay; normally open (nO) or normally closed (nC)
H Ground Signal 16 / 1.31 Reference for variable speed/trim input & switches
J Variable Speed Input 20 / 0.52 5K Ω Resistive, 0-2.5 V DC or 4-20 mA. Increasing voltage or resistance of current
increases speed.
K Droop Select 16 / 1.31 Active when connected to Terminal H
L Idle Select 16 / 1.31 Active when connected to Terminal H
MAux Input 20 / 0.52 Load sharing / synchronizing, 5V nominal (0-10 V), congurable polarity
N CAN L 20 / 0.52 Twist wires 14 turns per foot.
P CAN H 20 / 0.52
RECOMMENDATIONS
1. Shielded cable should be used for all external connections to the EEG control. One end of each shield, including the speed sensor shield, should be
grounded to a single point on the EEG case.
2. Case should be grounded
5K ΩRESISTIVE SPEED TRIM POT
0-2.5 V OR 4-20 MA* VARIABLE SPEED INPUT
When installing controller be sure there’s a good connection between the case of the EEG6500 and the chassis
/ battery ground.
If EEG detects no input from the magnetic pickup, the EEG will set the actuator to 0V and set the speed to 0 RPM. The display
will ash the RPM along with the Warning Indicator. Parameters will be unchangeable.
* 4-20mA input requires an external 200 Ω resistor across Terminals H & J
IMPORTANT

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EEG6550 Enhanced Electronic Governor 5-2020-A1 PIB1118
One row of parameters is displayed at a time.
Row 2 Column 3
Locking/Unlocking the Display
Press and hold both the UP and DOWN arrows
simultaneously for 3 seconds to UNLOCK or to
LOCK the display.
OVER SPEED will blink when the unit is in over-
speed. (Cycle power to restart)
Once the LOCK parameter on the main menu is en-
abled (ON), the display can be manually unlocked.
If the EEG detects an actuator overcurrent
it will terminate power to the actuator, the
display will ash Actuator Current along
with the warning indicator. (Cycle power to
restart)
Displays the units for the parameter (e.g. RPM)
PARAMETER UNITS
Displays the value of a selected parameter or
live running parameter. This area will blink if a
system shutdown and restart is required.
PARAMETER VALUE
Pressing UP or DOWN arrow toggles through the
four secondary parameters: Engine Speed (RPM),
Duty Cycle (%), Actuator Current (Amps), Engine
Speed (Hz), Battery Voltage (V DC), Hour Meter
(Hrs) and Service Time (SHR)
SECONDARY PARAMETERS
OVERCURRENT
QUIKSET MENU
FUEL LIMIT
If the EEG detects that the FUEL LIMIT
setting has been exceeded, the display will
ash the FUEL LIMIT along with the warning
indicator. Parameters will be unchanged.
OVER SPEED
LOCK
21 3
Tap any
For: SPEED
For: IDLE
For: FUEL LIM
Hold
To change the displayed row of parameters:
To view a parameter value in a selected row:
Hold: Button 1
Hold: Button 2
Hold: Button 3
COLUMN SELECT BUTTONS
Parameter
Adjust Up
Parameter
Adjust
Down
Increment a Parameter Value:
HOLD and TAP or
Rapidly Increment a Value:
HOLD and HOLD or
Lock the Display:
HOLD and for 2 seconds
PARAMETER ADJUST
END USER INTERFACE
ACTUATOR DUTY CYCLE
100%= 11 Bars
90-99% = 10 bars
...
10-19% = 2 bars
1-95% = 1 bar
0% = 0 bars
PRIMARY PARAMETER VALUE
(Blinks if restart required) PRIMARY PARAMETER UNITS
Pressing either UP or DOWN arrow
moves the primary and secondary
parameters to the next parameter
set. The list is always traversed in
one direction.
PRIMARY PARAMETER (UNITS)
Engine Speed (RPM)
Duty Cycle (%)
Actuator Current (A)
Engine Speed (Hz)
Battery Voltage (V DC)
Hour Meter (Hrs)
Service Time (SHR)
SECONDARY PARAMETER
Actuator Duty Cycle
Engine Speed relative to set point
Duty Cycle
ENGINE SPEED
Middle bar = set point
Top bar = Set point + 10 RPM
Bottom bar = set point - 10 RPM
SECONDARY PARAMETER
5DISPLAY & CONTROLS

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EEG6550 Enhanced Electronic Governor 5-2020-A1 PIB1118
IMPORTANT Increasing voltage or resistance increases speed.
Variable Speed Input Signal, the EEG6550 controller accepts Resistive, Current and Voltage input signals selected from the VSMD
parameter on the Advanced Menu page.
Variable Speed Response to External Voltage Input Variable Speed Parameter (VSPD)- ON, 5 K Potentiometer Between Terminal H & J
Congured for 900 to 1800 RPM.
• Current Input: (Select CUr) Add an external 200 Ω resistor across Terminals H and J for a 4-20 mA input signal. The SPEED pa-
rameter sets the low speed at 4 mA, V.SPEED parameter sets the high speed at 20 mA. If the input current drops below 4 mA,
variable speed will be clamped at 0 %. If the input current level exceeds 20 mA, variable speed will be clamped at 100%. RPM
response to current is linear.
• Voltage Input: (Select 5dc) voltage to 4.25 V, above 4.25 V the variable speed function will be clamped at 100 %, RPM response
to voltage is linear.
• Resistive Input: (Select rES) Connect a 5K
potentiometer between Terminals H and J.
Maximum operating voltage is 2.5 V DC,
response to this input is slightly non-linear.
6FEATURES
SPECIAL MENU
PARAMETER
QUIKSET MENU
PARAMETERS
VSPD MODE SPEED V. SPEED
OFF Trim
(Default)
Application Rated Speed
(e.g., 1500 RPM) Speed Trim (10 = ±10 Hz)
ON Variable
Speed
Minimum speed when potentiometer
is at lowest resistance
(e.g.,1000 RPM)
Maximum Speed when potentiometer is at the highest resistance
(e.g., 2000 RPM)
TRIM or VARIABLE SPEED OPERATION
Trim Function - Performs ner adjustments (e.g. generator frequency) The resistive input speed function is active when the VSPD
(Variable Speed) parameter is OFF (default value is OFF). 5K Ω potentiometer typical.
Variable Speed Function - Operates over a larger RPM range. Variable speed 0 - 2.5 V input to Terminal J is active when VSPD
(Variable Speed) parameter is ON.
Increasing voltage, resistance or current increases speed.

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EEG6550 Enhanced Electronic Governor 5-2020-A1 PIB1118
The optional external switch must be connected between Terminals H and L. A pressure switch may also be used as a method of en-
abling. When enabled, IDLE has an independent Gain adjustment.
IDLE SPEED
AUXILIARY INPUT
The Auxiliary (Aux) input, Terminal M, accepts signals from
auto synchronizers, load sharing units, and other GAC acces-
sories. Auxiliary Input Polarity (AUXP) set for InC: Increases
Speed w/ Increased Voltage or dEC: Decreases Speed w/ In-
creased Voltage. Aux input is nominally 5.0 V +/-
COM
A DCB E HGF LKJ M
HJ
5KΩ
CCW
Terminal J Utilizes A
CCW Potentiometer
VSPD
Conversion Formulas:
HertzMAG PICKUP = (RPM x # Teeth)
60sec
RPM = (HertzMAG PICKUP x 60sec)
# Teeth
4-20 mA input requires an external 200 Ω resistor across Terminals H & J
Turning the Light Force Governor, (LFG) feature ON (default is OFF) scales the governor’s proportional response (GAIN) for the best
resolution when controlling small actuators, like the T1 ATB, ALR/ALN, 100/103/104 series and normally closed Cummins EFC actua-
tors. Turn the LFG feature ON for use with these low current actuators.
The letters LFG display in place of the Primary Parameter Units when adjusting GAIN and STABILITY to indicate the feature is ON.
The LFG Feature can only be turned ON or OFF when the engine is not running.
Turning the Lead Circuit (LEAD) ON (default is ON) enables the governor to be more responsive and typically increases the range of
GAIN adjustment. Turn Lead Circuit ON when there is slow or moderate hunting at higher GAIN settings.
Turning the Speed Anticipation feature (SANT) ON (default is OFF) reduces RPM recovery time during high load transients, it requires
both no load (NLCU) and full load current (FLCU) values to be entered correctly.
LIGHT FORCE GOVERNOR
LEAD CIRCUIT
SPEED ANTICIPATION
Input Voltage
6FEATURES (CONTINUED)
SPEED SWITCH SETTINGS
SSWS is the SPEED SWITCH setting, RPM range is 250 to 4000 RPM. Default setting is 2000 RPM.
SSWP sets the output polarity at either nO (normally open) or nC (normally closed). Default is set at nO.
SSWL sets the speed switch LATCH. With the Latch ON and the speed switch setting exceeded (based on SSWP) the output state is
latched until power is cycled. With the Latch setting OFF, the output state of the terminal automatically resets at 0 RPM. Default is ON.
POTENTIOMETER, VOLTAGE OR MILLIAMP INPUT TO TERMINAL J

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EEG6550 Enhanced Electronic Governor 5-2020-A1 PIB1118
SRVT sets the hour meter for an alert at the selected service interval. Range of adjustment is 1 to 2000 hours, the default value is 500
hours. If the service time is expired, the displayed number will be ‘0’ or negative.
Disable SRVT by selecting OFF on the Advanced Menu parameter page. Default is Disabled - OFF.
ADVANCED MENU PARAMETERS (CONFIGURABLE)
PARAME-
TER DEFINITION RANGE DE-
FAULT
AUx Auxiliary Input Enable
145 Hz/V, 5 V nominal Range: 1-9 V O󰀨, On O󰀨
AUxP
Auxiliary Input Polarity
V DC: Speed Increases w/ Increased
Voltage or dEC: Speed Decreases w/
Increased Voltage
dEC, InC dEC
VSPD Variable Speed or Trim Select
(On=Variable Speed, O󰀨=Trim) O󰀨, On O󰀨
VSMD Variable Speed Input Signal
Resistive / Current / Voltage
rES/
Cur/5dc 5dc
VGLO Variable speed GAIN, low speed setting 1 - 100 50
VGHI Variable speed GAIN, high speed
setting 1 - 100 50
LFG Light Force Governor O󰀨, On O󰀨
LEAD Lead Circuit - For Increased Governor
Response / Increased GAIN Adjustment O󰀨, On ON
SANT Speed Anticipation
Improved Transient Performance O󰀨, On O󰀨
NLCU No Load Current - Amps 0.0 - 9.5 0.5
FLCU Full Load Current - Amps 0.5 - 10.0 4.0
SSWS Speed Switch Setting - RPM 100 to
4000 2000
SSWP Speed Switch: Normally Closed (nC) or
Normally Open (nO) nC / nO nO
SSWL
Speed Switch Latch On - Resets after
Cycling Power, Latch O󰀨 Automatically
Resets at ‘0’ RPM
On / O󰀨 ON
JADR CAN J1939 Address 0 - 253 0
SRVT Service Reset - Hours 1 - 2000 O󰀨
ADVANCED MENU PARAMETERS (READ ONLY)
PARAME-
TER DEFINITION
SREV Software revision number
BID Software build identier
AREV Assembly revision: Identies board hardware congu-
ration, not software.
FLTH Highest fault code since power up. Aids in trouble
shooting.
DATL Supplemental data associated with last fault code.
Aides in troubleshooting.
FLTL Last fault code detected. Associated data is DATL and
aids in trouble shooting.
SERVICE HOUR METER
7ADVANCED PARAMETERS MENU
Previous
Parameter Next
Parameter
Selecting Parameters:
Display Special
Menu Parameters:
Return to Quikset Menu:
Adjust Parameters:
1. After 3 minutes of no user input, EEG switches to
Quikset Menu.
2. Lock is displayed when attempt to change a
Read-Only parameter.
Increase
Parameter
Decrease
Parameter
Hold ALL 3 until
AUx appears in display
Hold ALL 3 for 2 seconds
6FEATURES (CONTINUED)
JADR parameter identies J1939 addresses, 0 to 253. Default set to
‘0’. See Section 13, J1939 CAN Information, for a description of the
transmittable data.

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EEG6550 Enhanced Electronic Governor 5-2020-A1 PIB1118
8
Set the following parameters before starting the engine:
#TEETH Input the Number of Teeth on the Flywheel. This can not
be changed while engine is running.
CRANK Input the Crank Termination (RPM)
SPEED Input the Fixed Speed of the Engine (RPM)
ADJUSTABLE QUIKSET PARAMETERS
OVER SPEED * #TEETH CRANK *
Range: 400 - 6000 RPM
Default: 2000 RPM
Range: 60 - 250
Default: 120
Range: 100 - 1000 RPM
Default: 400 RPM
RPM to automatically shuto󰀨 the
actuator Number of teeth on ywheel RPM which EEG switches from starting fuel
limit to fuel limit
SPEED RAMP V.SPEED * LOCKED
Range: 25 - 2000
Default: 300
Range: 0-6000 RPM (vspd) 0-120 Hz (trim)
Default: 1800 RPM (vspd) : 0 Hz (trim)
Range: OFF, ON
Default: OFF
Rate at which speed changes from
idle to set speed and back, or rate
change in variable speed mode.
Maximum speed change allowed from trim
input
Enables Manual/Auto locking of display. Press
and hold UP and DOWN arrows
simultaneously for 3 seconds to UNLOCK or
LOCK the display.
START FUEL DROOP% FUEL RAMP
Range: 0 - 100 %
Default: 100 %
Range: 0 - 25.0 %
Default: 5.0 %
Range: 1 - 100 % / Sec.
Default: 10 %
Initial actuator position at the start of
cranking
Droop to apply under maximum load
(based on current of actuator)
Actuator position increase in percent per sec-
ond from cranking to low idle speed, starting
from the Start Fuel position
SPEED * IDLE * FUEL LIM
Range: 0-6000 RPM (xed)
0-6000 RPM (droop)
Default: 1500 RPM (xed)
50 RPM (droop)
Range: 150 - 1500 RPM
Default: 900 RPM
Range: 0 - 100%
Default: 100%
Operating speed of engine Speed of engine when IDLE input is closed Maximum actuator percentage allowed
GAIN STABILITY DEADTIME
Range: 1 - 100, 100 = Max Gain
Default: 50 (rated)
: 10 (idle)
Range: 1 - 100, 100 = fastest response
Default: 50
Range: LOW, HI
Default: HI
Proportional (P) set point of the PID
control at operating SPEED and IDLE Integral (I) set point of the PID control Derivative (D) set point of the PID control
* 12 KHz MAx
PRE-START SET-UP & qUICkSET PARAMETERS

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EEG6550 Enhanced Electronic Governor 5-2020-A1 PIB1118
9ADJUSTING FOR STABILITY
GAIN - RATED SPEED & IDLE SPEED
Once the engine is running at operating speed and at no load, the following governor performance adjustments can be made to
increase engine stability.
GAIN TYPE ADJUSTMENT PROCEDURE
RATED SPEED 1. Selected when IDLE input is disconnected.
IDLE SPEED
1.
2.
3.
Connect the idle input to ground.
Change GAIN value.
Disconnect Idle input from ground to switch back to rated. Idle icon will blink.
The EEG6500 is equipped with two separate gains, one for rated speed, the other for idle speed. Both are set using the GAIN setting
on the Quikset Menu.
QUIKSET MENU
PARAMETER ADJUSTMENT PROCEDURE
A. GAIN
1.
2.
3.
4.
Increase this parameter until instability develops.
Then, gradually decrease this parameter until stability returns.
Finally, decrease this parameter one increment further to ensure stable performance.
If instability persists, adjust the next parameter.
B. STABILITY 1.
2.
Follow the same adjustment procedure as the GAIN parameter.
If instability persists, adjust the next parameter.
C. DEADTIME 1. If fast instability occurs, switch DEADTIME to low and repeat steps A & B.
Normally adjustments made at no load achieve satisfactory performance. For further performance see Section 14, System Troubleshooting.
NOTE
10 ADJUSTING FOR DROOP
EXAMPLE
After the initial set up is completed and the # of Teeth, Crank Termination Speed and Rated Speed are set, position the external switch
connecting Terminals H and K on to activate the DROOP mode following these sequence steps.
1. Go to the Advanced menu: Press and hold all three buttons simultaneously for two seconds to switch to Advanced Menu.
2. Conrm that the VSPD (Variable Speed / Fixed Speed Control) is OFF. Default position is o󰀨.
3. Conrm that the LEAD circuit is OFF. Default position is on.
4. Set the NLCU (No Load Current) to the measured / displayed current value when operating at no load rated speed (default
value is 0.5 amps.) The NLCU entered must be less than the FLCU and the di󰀨erence between the two must be at least 0.5 A.
If an invalid combination is entered a warning will be agged and the parameters will be default to 0.5 A and 4.0 A.
5. Set the FLCU (Full Load Current) to the measured / displayed current value when operating at full load rated speed (default
value is 4.0 amps.)
6. Return to the Main Menu: Press and hold all three buttons simultaneously for two seconds to switch to the Main Menu.
7. Select and set DROOP to the desired percentage.
8. Change the Speed parameter, which turns into the DROOP OFFSET.
9. This sets the RPM, above operating speed, to which the system will be commanded when DROOP is enabled. This is an o󰀨set
value.
1500 RPM operating speed x 0.05 (5.0% droop) = 75 RPM Input 75 RPM, this is the o󰀨set value.
VARIABLE SPEED GAIN
11
When in variable speed operation, the PID will use the VGLO (Varaible Gain Low) and VGHI (Variable Gain High) in place of the
GAIN parameter on the main screen. These variable speed Gain values are used to interpolate between the low and high points in
parallel with speed to provide gain ramping as speed is adjusted.
If the GAIN on the main menu is changed while in variable speed mode, the unit will ash LOCK to indicate the parameter
is not available in that mode.
NOTE

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EEG6550 Enhanced Electronic Governor 5-2020-A1 PIB1118
For all other codes, note the condition and contact GAC. The WARNING indicator will blink and failures
will cause a system shut down.
12 FAULT CODES
ADVANCED MENU PARAMETERS (CONFIGURABLE)
CODE CAUSE EFFECT CUSTOMER ACTION
1Actuator over current (continuous) Actuator turned o󰀨 for 30 s. Check actuator wiring.
2Loss of speed signal (inc/dec in speed by more than
64 Hz in 4 ms, 16 K Hz/s) WARNING indicator blinks then system shutdown Check speed pickup.
3
Over speed (speed exceeds OVER SPEED setting
for 12 ms) WARNING and OVER SPEED indicators blink
then system shutdown.
Check fuel system as well as
OVER SPEED, SPEED, and
V.SPEED
203 Variable Speed settings are reversed. V.SPEED is
lower than SPEED.
WARNING indicator blinks, speed set to V.SPEED
setting, variable speed input unresponsive.
Flip V.SPEED and SPEED
settings.
206 No potentiometer/signal detected on variable speed
input when VSPD enabled.
WARNING indicator blinks, speed set to SPEED
setting. Check potentiometer wiring.
241 New software loaded. Conguration not compatible. Default conguration used. Reset conguration.
251 Software loaded on incompatible hardware. WARNING indicator blinks then System shut-
down. Return unit to GAC
307 FLCU / NLCU Setting invalid Load calculation done with 0.5 & 4.0 amp values Adjust NLCU / FLCU
IMPORTANT
13 J1939 CAN INFO
Data transmitted on the J1939 Bus:
PGN DEFINITION NOTES
61443 Variable Speed (SPN91) / Load Input (SPN92) 0 - 100 %
61444 Engine Speed (SPN190) 0 - 100 %
64914 Operating State (SPN3543) / Shutdown Request
(SPN3607)
Stopped, Starting, Running, Post-Run
65216 Service Information (SPN916) Service Time, +/- 20,000 Hours
65252 Fault Condition (SPN2814) Engine Alarm Output Command Status, No Shutdown Requested
(SPN1110)
65253 Engine Run Time (SPN247) 0 - 65,500 Hours
65271 Battery Voltage (SPN158) 0 - 64 V DC

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EEG6550 Enhanced Electronic Governor 5-2020-A1 PIB1118
STEP WIRES NORMAL READING PROBABLE CAUSE OF ABNORMAL READING
1F(+) & E(-)
Battery Supply
Voltage
(12 or 24V DC)
1.
2.
3.
DC battery power not connected. Check for blown fuse
Low battery voltage
Wiring error
2 C & D 1.0V AC RMS min.
While Cranking
1.
2.
3.
4.
Gap between speed sensor and gear teeth too great
Improper or defective wiring to the speed sensor
Resistance between Terminals D and C should be 130 to 1200 Ω.
Defective speed sensor.
3F(+) & A(-) 1.0 - 2.0V DC
While Cranking
1.
2.
3.
4.
5.
SPEED or IDLE parameter set incorrectly
CRANK or START FUEL set incorrectly
Short/open in actuator wiring
Defective speed control
Defective actuator, see your actuator troubleshooting documentation.
If the engine governing system does not function, the fault may be determined by performing the voltage tests described in Steps 1
through 3. Positive (+) and negative (-) refer to meter polarity. Should normal values be indicated during troubleshooting steps, then the
fault may be with the actuator or the wiring to the actuator. Tests are performed with battery power on and the engine o󰀨, except where
noted. See your actuators installation manual for testing procedures for that actuator.
SYSTEM TROUBLESHOOTING
14
INSTABILITY SYMPTOM PROBABLE CAUSE OF ABNORMAL READING
Fast Periodic
The engine seems to jitter with
a 3Hz or faster irregularity of
speed.
1.
2.
Readjust the GAIN and STABILITY for optimum control.
In extreme cases, change the DEADTIME parameter.
Slow Periodic Speed irregularity below 3Hz.
(Sometimes severe)
1.
2.
Check fuel system linkage during engine operation for:
a. binding
b. high friction
c. poor linkage
DEADTIME Parameter set too high.
Non-Periodic Erratic Engine Behavior
1. Increasing the GAIN should reduce the instability but not totally correct it. If this is the case, there
is most likely a problem with the engine itself. Check for:
a. engine mis-rings
b. an erratic fuel system
c. load changes on the generator set voltage regulator.
SYSTEM INOPERATIVE
INSTABILITY
UNSATISFACTORY PERFORMANCE
SYMPTOM NORMAL READING PROBABLE CAUSE OF ABNORMAL READING
Engine Over Speeds
1. Do Not Crank. Apply DC power to
the governor system.
1. If the actuator is at minimum fuel position and there exists an erroneous
speed signal, then check speed sensor.
2. Manually hold the engine at the
desired running speed. Measure the
DC voltage between Terminals A(-)
& F(+) on the speed control unit.
1.
2.
3.
If the voltage reading is
1.0 to 2.0 V DC:
a. SPEED parameter set above desired speed
b. Defective speed control unit
If voltage reading is > 2.0 V DC then check for:
a. actuator binding
b. linkage binding
If the voltage reading is below 1.0 V DC then defective speed control
unit
3. Check #TEETH parameter. 1. Incorrect tooth count entered.
Over Speed shuts down en-
gine before or after running
speed is reached
1. Examine the SPEED and OVER
SPEED operating parameters for
the engine
1.
2.
3.
4.
5.
6.
SPEED parameter set too high.
OVER SPEED set too close to SPEED.
Check SPEED RAMP parameter.
Check if VSPD is ON by mistake
Check if AUx is ON by mistake
Actuator or linkage binding.
Speed Control unit defective.
Gain too low.
Over Speed shuts down
engine before running
speed is reached
1. Check resistance between Termi-
nals C&D. Should be 130 to 1200
Ω. See specic Magnetic Pick-up
data for resistance.
1.
2.
OVER SPEED set too low
If the speed sensor signal is erroneous, then check the wiring.
SYSTEM TROUBLESHOOTING
14

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EEG6550 Enhanced Electronic Governor 5-2020-A1 PIB1118
SYMPTOM NORMAL READING PROBABLE CAUSE OF ABNORMAL READING
Actuator does not
energize fully
1. Measure the voltage at the
battery while cranking.
1. If the voltage is less than:
a. 7 V for a 12 V system, or
b. 14 V for a 24 V system,
Then: 1. Check wiring
2. Check circuit protection/relay
3. Check charging system
4. Check battery
2. Momentarily connect Terminals A and F. The
actuator should move to the full fuel position.
1.
2.
3.
4.
5.
Actuator or battery wiring in error
Actuator or linkage binding
Defective actuator
Fuse open. Check for short in actuator or harness.
Check START FUEL and CRANK
Engine remains below
desired governed speed
1. Measure the actuator output, Terminals A & B,
while running under governor control.
1.
2.
If voltage measurement is within 2 V DC of the battery supply
voltage level, then fuel control is restricted from reaching full
fuel position, possibly due to mechanical governor, carburetor
spring, or linkage interference.
Check SPEED, IDLE, GAIN, START FUEL, and CRANK
UNSATISFACTORY PERFORMANCE
14 SYSTEM TROUBLESHOOTING (CONTINUED) 14
If unsuccessful in solving instability, contact GAC for assistance.
[email protected] or call: 1-413-233-1888

13 Governors America Corp. © 2020 Copyright All Rights Reserved
EEG6550 Enhanced Electronic Governor 5-2020-A1 PIB1118
EEG6550 Technical Assistance Worksheet
Please provide the following information so we assist you with timely, technical recommendations:
Date:
Company Name:
Contact Info:
E-Mail Address:
Phone Number:
Reported Problem:
Engine Make, Model & Application:
Controller Model and Serial Number:
Actuator Model and Serial Number:
EEG6550 GOVERNOR SETTINGS
Parameter Factory Settings Customer Settings
# of Teeth 120
Crank 400 RPM
Speed Ramp 300 RPM/sec
Overspeed 2000 RPM
V.Speed 1800 RPM (VSPD) 0 Hz (Trim)
Start Fuel % 100
Droop % 5.0
Fuel Ramp % 10
Speed 1500 RPM
Idle 900 RPM
Fuel Limit % 100
Gain 50 (Rated) 10 (Idle)
Stability 50
Deadtime HI
ADVANCED SETTINGS
Parameter Factory Settings Customer Settings
AUx O󰀨
AUxP dEC
VSPD O󰀨
VSMD 5dc
VGLO 50
VGHI 50
LFG O󰀨
LEAD ON
SANT O󰀨
NLCU 0.5
FLCU 4.0
SSWS 2000 RPM
SSWP nO
SSWL ON
JADR 0
SRVT OFF
FLTL ------
DATL ------
ELECTRICAL CHECKS
F(+) & E (-) 12 or 24 V DC
C & D 1.0 V AC RMS Min. at Crank-
ing
F (+) & A (-) 1.0 to 2.0 V DC While Cranking
ADVANCED MENU PARAMETERS (READ ONLY)
Parameter Factory Settings Software Revision
Number
SREV ------