Specifications

22
Troubleshooting
WARNING
Hot engine parts can cause severe
burns. Always allow the engine time to cool be-
fore performing any maintenance or service.
TABLE 4. TROUBLESHOOTING lists the Fault
Codes in numerical order along with step-by-step
instructions for corrective action. If you fail to re-
solve the problem after taking the corrective actions
suggested, contact an authorized Onan dealer. See
How to Obtain Service (Page 34).
First note the following:
• Maintaining engine oil level, keeping battery
connections clean and tight, watching the fuel
gauge, not overloading the genset, etc. will
prevent most shutdowns.
• When the genset and vehicle engine share a
common fuel tank the fuel dip tubes are usual-
ly arranged so that the genset will run out of
fuel first. Marking the genset empty point on
the fuel gauge will make it easier to tell when
to stop the genset before running it out of fuel.
First-Level Fault Codes: The genset controller
provides extensive diagnostics by causing the sta-
tus indicator light on the Control Switch to blink in a
coded fashion. Following a fault shutdown, the indi-
cator light will repeatedly blink 1, 2 or 3 blinks at a
time.
• One blink indicates shut down due to high tem-
perature
• Two blinks indicates shutdown due to a loss of
engine oil pressure
• Three blinks indicates shutdown due to some
other abnormal condition.
Second-Level Fault Codes: For a 1-blink or 3-blink
first-level fault code, one touch to Stop brings up a
second-level fault code. This code consists of 1, 2, 3
or 4 blinks, a brief pause, and then 1 to 9 blinks. The
first set of blinks represents the tens digit and the
second set of blinks the units digit of the fault code
number. For example, Fault Code No. 23 would ap-
pear as:
blink-blink—pause—blink-blink-blink—...
NOTE: Fault Code Nos. 1, 2 and 3 are first-level faults.
Avoid interpreting them as second-level Fault Codes
11, 22 and 33. The pauses between repetitions of the
fault code are longer than the pauses between the
tens and units digits of the the code. For example,
Fault Code 33 would appear as:
blink-blink-blink—pause—blink-blink-blink
—longer pause—
blink-blink-blink—pause—blink-blink-blink—...
Restoring Fault Code Blinking: The fault code
stops blinking after five minutes. Press Stop three
times within five seconds to restore blinking. Note
that the last fault logged will blink, even after the
condition that caused the shutdown has been cor-
rected.