Kohler 20RESAL Manuale di risoluzione dei problemi - Pagina 5
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8. 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.
9. Monitor voltage at the fuel solenoid valve to verify
that battery voltage is present when running and
absent when not running.
10. 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.
11. 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 12.
D
Worn bushings. Go to step 13.
D
Carburetor gasket. Go to step 14.
b. Yes? Proceed to step 15.
12. 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.
13. Are the bushings worn, causing excessive
movement of the linkage?
a. Yes? Replace the bushings.
b. No? Proceed to the next step.
14. Is the carburetor gasket interfering with the throttle
plate or linkage?
a. Yes? Always trim the carburetor gasket and
test the operation before replacing the
carburetor. See Figure 3.
Note: Engines with serial numbers 4223605221 or
higher have a new carburetor gasket that
does not require trimming.
b. No? Proceed to the next step.
SB-722
1/13
15. While running the unit with no load, unplug the
stepper motor harness. Does hunting continue?
a. Yes? Then it is not a controller or governor
issue. We can now narrow it down to these
possibilities:
D
Regulator replacement
D
Fuel solenoid replacement
D
Spark plug condition check/replacement
D
Perform a cylinder leak-down test. See the
engine service manual for instructions.
D
If none of these procedures remedy the
hunting, contact your Kohler distributor.
b. No?
Controller issue.
controller software to version 4.09 or higher.
Note: For the Model 20RES with RDC controller only,
test the magnetic pickup as described below.
D
Is the magnetic pickup operating correctly?
Measure
output
disconnects. Should be a minimum of 3 VAC
while cranking.
D
Monitor
the
magnetic
measurement while manually holding the engine
RPM steady. The frequency should remain
constant. If it is erratic, check the wiring and
crimp connections. Check that the mag pickup
air gap is 0.5 mm (0.020 in.) and adjust if
necessary. If measurements are still erratic,
replace the magnetic pickup.
16. Reconnect the ATS by connecting PWR and COM
(RXT) or engine start leads 3 and 4 (RDT).
17. Verify the generator set operation.
generator set Operation Manual for instructions.
Note: If the generator set still hunts after performing
these procedures, please contact your Kohler
distributor for additional information.
1
1. Trim this edge if necessary
2. Trim 0.75 mm (0.03 in.) from the edge of each opening
Figure 3 Trimming the Carburetor Gasket
Loctiter is a registered trademark of the Henkel-Loctite
Corporation.
Update the RDC2
voltage
at
the
quick
pickup
frequency
See the
2
tp6806
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