wc_tx002068gb.fm
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Onan Genset Genset Maintenance
9.8 Genset Shut-Down Codes
Background
The genset controller includes built-in diagnostic capabilities. Through the blinking
of the light indicator on the control switch, a genset fault may be diagnosed. After a
fault shutdown, the indicator light will blink a code that indicates the type of fault.
The indcator light will repeatly blink 1, 2, 3, or 4 blinks at a time.
One blink signifies a shutdown due to a high-temperature condition.
Two blinks indicates a shutdown due to a loss of engine oil pressure.
Three blinks indicates a shutdown due to a service fault.
Each type of service fault is indicated by a second-level shut-down code. When
the indicator is blinking three blinks, pressing Stop will cause the two-digit, sec-
ond-level shut-down code to appear. (Pressing Stop again will stop the blinking.)
The two-digit codes consist of 1, 2, 3, 4, or 5 blinks, a brief pause, 1 to 9 blinks,
and then a long pause. The code then repeats. For example, shut-down code
36 appears as:
blink-blink-blink—pause—blink, blink, blink, blink, blink, blink—long pause—repeat
Four blinks indicates that engine cranking exceeded the preset time without
the engine starting. The preset time is 20 seconds when the ambient tempera-
ture is above 0°C (32°F); 30 seconds when the ambient temperature is below
0°C (32°F).
Note Be careful not to interpret first-level shut-down faults numbers 3 and 4 as
second-level shut-down codes “33” and “44”, which have not been asigned as
shut-down codes.
The genset controller stops the diagnostic fault blinking after five minutes. To
resume the blinking, press and release Stop three times rapidly (within three
seconds).
The last fault logged will blink, even after the condition that caused the shut-
down condition has been corrected.
Stop /
Prime
Start /
Preheat
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