Service manual

9. Troubleshooting 9-2013
9.25 Generator Set Stopped Without Fault Condition -
Fault Code 36
Logic: RPM less than 500 and Sense Voltage S1-S2 at 0 VAC while fuel pressure switch open
and no other fault condition occurred
Possible Causes: Fuel supply, air fuel mixture, exhaust system, choke, demand regulator,
carburetor, generator windings, ignition, wire connections
Diagnosis & Repair:
1. Verify that the Last Fault is FC 36: Yes, continue diagnosis; No, troubleshoot actual last
fault.
2. Verify engine rotation manually: repair engine damage as necessary.
3. Verify generator rotation manually: repair generator damage as necessary.
4. Disconnect the generator set control J1 connector, verify that the J1 pins are fully inserted,
and inspect pin condition using the steps below:
• Use the test points of the tester tool #420-0603
• Use a mating pin connector, a pin gauge of the same size (.045") as the mating
control connector pin, or any suitable device that will not damage the inside contact
wipers of the pin socket
• Insert, repair, or replace pins as necessary.
5. Reconnect the J1 connector and test run the generator set for fault occurrence: repair or
replace pins in the connector as necessary.
6. Check the air filter for cleanliness; replace air filter as necessary.
7. Check for a blocked or damaged exhaust system: repair or replace exhaust components as
necessary.
8. Measure the generator set load capability with a shop load bank.
9. Measure AC frequency while changing engine rpm to determine if frequency response
matches engine rpm response.
10. Propane Models
a. When ambient temperatures are less than 40°F vapor – withdrawal Propane tanks
should be at least half full to provide proper vaporization rate.
b. Propane having more than 2.5 percent Butane will not vaporize in ambients at less
than 32°F; use HD-5 grade Propane.
c. Run the generator set on shop fuel supply; verify the tank level and fuel line condition.
11. Measure steady DC voltage at the fuel solenoid while the generator set is running; repair
wiring as necessary.
12. Verify clear vent hose.
13. Check the generator set fuel lines for damage: replace fuel lines as required.
14. Measure the fuel supply and regulator lock off pressures.
15. Check the governor, actuator, linkage, and spring for debris, damage, and looseness:
readjust and repair as necessary.
102 A030A239 (Issue 10)