TP-6805 8/15 69Section 5 Troubleshooting
If the unit still hunts after performing the preceding
steps, continue following the troubleshooting steps
below.
4. Use SiteTech to check the Engine Speed Gain
Adjustment setting. The default setting is 50 and it
normally is not adjusted.
a. If the setting is not 50, reset to 50 and run the
engine again.
b. If the setting is 50, change the value in
downward increments of 5. Note the effect that
the change has on the speed of the hunting.
c. If decreasing the setting is not effective, reset to
50 and increase in increments o f 5.
5. Check the air cleaner filter element. Replace the
filter element if it is dirty and proceed to the next
step.
6. Check the air intake tube that runs from the filter
housing to the controller J-box. Is the tube seated
properly on the filter housing? Is the grommet
completely inserted in the housing?
a. No? Adjust tubing and grommet as needed.
b. Yes? Proceed to the next step.
7. Verify that the unit is set up for the proper fuel
source. See the generator set Installation Manual
for instructions.
D LPG: Insert orifice and disconnect ignition
timing leads.
D NG: Remove orifice and connect ignition timing
leads.
8. Is fuel pressure from the source steady and at
acceptable levels during all phases of operation?
Verify the minimum and maximum fuel pressures
with the spec sheet. Pressure should not vary more
than 10% from static pressure when starting and
accepting full load.
a. If the pressure varies more than 10% during
operation, check the fuel supply and adjust as
needed.
b. If the pressure is steady, proceed to the next
step.
9. Energize the fuel solenoid valve to verify that it is
opening and closing properly. You should hear an
audible click if the solenoid is operating. Is it
operating correctly?
a. No? Replace the fuel solenoid valve.
b. Yes? Proceed to next step.
10. Monitor voltage at the fuel solenoid valve to verify
that battery voltage is present when running and
absent when not running.
11. Are the carburetor or intake bolts loose, allowing
movement and excess air to be introduced into the
system?
a. Yes? Reposition the carburetor so that the
throttle plate will not touch the carburetor
gasket. Apply Loctiter to the bolt threads and
tighten as needed.
b. No? Proceed to the next step.
12. Do the throttle plate, linkage between throttle and
stepper motor, and stepper motor itself move
freely?
a. No? Check for restrictions including:
D Linkage. Go to step 13.
D Worn bushings. Go to step 14.
D Carburetor gasket. Go to step 15.
b. Yes? Proceed to step 16.
13. On the linkage, is the bias spring in place, around
both bushings and/or connected to the holes the
bushings are inserted in?
a. No? Replace bias spring.
b. Yes? Try different positions on the throttle
linkage plate. If it has no effect, replace bias
spring to original position and proceed to the
next step.
14. Are the bushings worn, causing excessive
movement of the linkage?
a. Yes? Replace the bushings.
b. No? Proceed to the next step.
Loctiter is a registered trademark of the Henkel-Loctite
Corporation.
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