Error Code [301] (Engine Low Idling Speed Out Of Standard Range); Error Code [302] (Engine High Idling Speed Out Of Standard Range) - Komatsu PC130-7 Shop Manual

TROUBLESHOOTING

Error code [301] (Engine low idling speed out of standard range)

User code Error code
– 301
Contents of
• Engine speed below 500 rpm is sensed for continuous 10 seconds while the engine is running.
trouble
Action of • None in particular.
controller • If the cause of the failure disappears, the system resets itself.
Problem that
appears on • If the machine is operated as it is, the engine may be damaged.
machine
Related • The input state (rpm) from the engine speed sensor can be checked with the monitoring function.
information (Code: 010, by 10 rpm)
Possible causes Abnormality in mechanical
1
and standard system of engine
value in normal
state
Defective governor and
2
pump controller

Error code [302] (Engine high idling speed out of standard range)

User code Error code
– 302
Contents of
• Engine speed above 2,600 rpm is sensed for continuous 10 seconds while the engine is running.
trouble
Action of • None in particular.
controller • If the cause of the failure disappears, the system resets itself.
Problem that
appears on • If the machine is operated as it is, the engine may be damaged.
machine
Related • The input state (rpm) from the engine speed sensor can be checked with the monitoring function.
information (Code: 010, by 10 rpm)
Possible causes Abnormality in mechanical
1
and standard system of engine
value in normal
state
Defective governor and
2
pump controller
20-352
(1)
Engine low idling speed out of standard range
Trouble
(Governor and pump controller system)
Cause Standard value in normal state/Remarks on troubleshooting
Check for external and internal factors that have lowered the engine low
idling speed, and then carry out troubleshooting for the mechanical sys-
tem of the engine.
Troubleshooting cannot be carried out since the defect is in the gover-
nor and pump controller. (If there is not any visible trouble in the
machine, the controller may be used as it is.)
Engine high idling speed out of standard range
Trouble
(Governor and pump controller system)
Cause Standard value in normal state/Remarks on troubleshooting
Check for external and internal factors that have heightened the engine
high idling speed, and then carry out troubleshooting for the mechanical
system of the engine.
Troubleshooting cannot be carried out since the defect is in the gover-
nor and pump controller. (If there is not any visible trouble in the
machine, the controller may be used as it is.)
[301], [302]
PC130-7