Product Manual

4-1
4. Troubleshooting
WARNING
Hot engine parts can cause severe
burns. Always allow the engine time to cool be-
fore performing any maintenance or service.
TABLE 1. 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 7-1).
First note the following:
S Maintaining engine oil level, keeping battery
connections clean and tight, watching the fuel
gauge, not overloading the genset, etc. will
prevent most shutdowns.
S 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.
FAULT CODES
The genset controller provides extensive diagnos-
tics by causing the status indicator light on the Con-
trol Switch to blink a numeric code. Following a fault
shutdown, the indicator light will repeatedly blink 3
blinks or 4 blinks at a time.
S Three blinks indicates a service fault. Press
Stop once to cause the two-digit, second-lev-
el fault code to blink. (Pressing Stop again will
stop the blinking.)The two-digit 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 exam-
ple, Fault Code No. 36 appears as:
blink-blink-blink—pause—blink-blink-blink-blink-blink-blink...
S Four blinks indicates that cranking exceed-
ed 15 to 20 seconds without the engine start-
ing.
S
Note: Fault Code Nos. 3 and 4 are first level
faults. Avoid interpreting them as second-level
Fault Code Nos. 33 and 44, which have not
been assigned as fault codes.
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
corrected.
TABLE 1. TROUBLESHOOTING
Some genset service procedures present hazards that can result in severe per-
sonal injury or death. Only trained and experienced service personnel with knowledge of fuels,
electricity, and machinery hazards should perform genset service. See Safety Precautions.
WARNING
STATUS INDICATOR LIGHT DEAD
(Faulty connections, no battery voltage)
Corrective Action:
1. Try the genset Start Switch if the remote Start Switch does not work, and vice versa.
2. Clean and tighten the positive (+) and negative (−) battery cable connections at the battery, vehicle
frame and genset.
3. Recharge or replace the battery. Refer to the battery manufacturer’s recommendations.
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