Service manual

9-2013 9. Troubleshooting
6. Reconnect J1 connector and test run generator set for symptom: repair or replace pins in
connector as necessary.
7. Measure battery voltage at generator set while attempting to start from local or remote
switch: recharge or replace battery if voltage drops below 8 VDC, test and service
generator set battery charger.
8. Measure battery voltage and check for voltage increase while generator set is running.
9. Measure for continuity change across start/stop switch between neutral and start position
and neutral and stop position at switches and at connector J1: reconnect or repair
connections, replace switches as necessary.
10. Measure for continuity from start and stop inputs to ground at switches and at connector
J1: Repair or replace damaged harness.
11. Determine if “Standby Ready" is enabled (Control will command start and stop based on its
own settings): disable “Standby Ready" or explain “Standby Ready" function to customer.
12. Verify the condition of the spark plugs and whether they are Cummins Onan branded
plug(s). Non-resistive type plugs sold through non-Cummins Onan channels can cause this
condition. Replace the spark plug(s) if questionable or of non-Cummins Onan origin.
Please see field flash for more information.
9.6 No Response - Status Indicator Light Dead
Logic: To start - the control receives ground via the start/stop switch to start or stop input on
control
Possible Causes: Low/No battery voltage, poor battery connection, faulty battery, open
harness connection, faulty start/stop switch, faulty LED, F3 fuse open
Diagnosis and Repair:
1. Measure the battery voltage at the battery, at the generator set, and at connector J1:
reconnect, clean, repair, and replace connections as necessary.
2. Measure battery voltage at the generator set while attempting to start or prime from the
local or remote switch: recharge or replace the battery if voltage drops below 8 VDC, test
and service the generator set battery charger if so equipped, increase battery cable size or
run parallel cables.
3. Check F3 fuse for open circuit.
4. Measure for continuity change across start/stop switch between neutral and start position
and neutral and stop position at switches and at connector J1: reconnect or repair
connections; replace switches as necessary.
5. Test switches LED by energizing with 12 VDC: replace switches as necessary.
6. Disconnect the generator set control J1 connector. Verify that the J1 pins are fully inserted
and inspect pin condition, using one of the processes listed below. Then insert, repair, or
replace pins as necessary.
Pin Inspection Processes (use one of the following to inspect the pins):
• Use the test points of the tester tool #420-0603
• Use a mating pin connector
• Use a pin gauge the same size (.045") as the mating control connector pin
A030A239 (Issue 10) 87