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EEG7500 Enhanced Electric Governor 8-2021-A8 PIB5115
SYmPTom
SUGGeSTeD TeST
ProBaBLe caUSe If aBnormaL reSULT
Engine Overspeeds
1. Do Not Crank. Apply DC power to the governor system.
1.
2.
After the actuator goes to full fuel,
disconnect the
speed sensor at Terminal 3.
If the actuator is still at full fuel-speed then the
control unit is defective.
2. Manually hold the engine at the desired running speed.
Measure the DC voltage between Terminals B(-) and
D(+) 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:
a. Defective speed control unit
3.
Check Flywheel teeth parameter.
1.
Incorrect number of teeth entered.
Overspeed shuts down
engine after running speed is
reached
1.
Examine the SPEED and OVERSPEED values for the
engine.
1.
2.
3.
4.
SPEED parameter set too high.
OVERSPEED set too close to SPEED.
Actuator or linkage binding.
Speed Control unit defective.
Overspeed shuts down
engine before running speed
is reached
1.
Check resistance between Terminals 1 and 2. Should
be 30 to 1200 Ω. See your specific Magnetic Pick-up
data for resistance.
1.
2.
OVERSPEED set too low
If the speed sensor signal is erroneous check the
wiring.
Actuator does not energize
fully
1. Measure the voltage at the battery while cranking.
1.
If the voltage is less than:
a. 7 V DC for a 12 V DC system, or
b. 14 V DC for a 24 V DC system,
Then: Check or replace battery.
2.
Momentarily connect Terminals B and D. The actuator
should move to the full fuel position.
1.
2.
3.
4.
Actuator or battery wiring in error
Actuator or linkage binding
Defective actuator
Fuse opens. Check for short in actuator or har-
ness.
Engine remains below de-
sired governed speed
1.
Measure the actuator output, Terminals A and 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.
SPEED parameter set too low
SYSTEM TROUBlEShOOTING (CONTINUED)
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If unsuccessful in solving instability, contact Gac for assistance.
[email protected] or call: 1-413-233-1888
faQs
What is PID?
The EEG7500 is a PID controller. This means it uses a correction algorithm that combined with user added settings for proportional (Gain), integral (Sta
-
bility) and derivative (dead time) makes the engine more responsive to load changes. Gain (P), Stability (I) and Deadtime (D) settings are individually ad
-
justed, and based on the difference between these setting values the speed control unit uses the PID algorithm to calculate a correction factor to smooth
response times during transient load changes in your engine. To learn more see
on the GAC website.
UnSaTISfacTorY Performance
