| CPC E02F 9/24 (2013.01) [E02F 9/2004 (2013.01); E02F 9/2066 (2013.01); E02F 9/267 (2013.01)] | 5 Claims |
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1. A work machine comprising:
a work device;
an operation lever operating the work device;
a main controller configured to control operation of the work device on a basis of operation of the operation lever, and diagnose presence or absence of a failure in the main controller when supply of power from a battery is started;
a relay provided to a power line that connects the battery and a power supply circuit of the main controller to each other;
an engine controller configured to perform auto idle control that decreases an engine revolution speed to an idle revolution speed when an auto idle activating command is input; and
a sub-controller configured to determine that an auto idle condition is satisfied in case the operation lever is not operated for a first time and output the auto idle activating command to the engine controller when the auto idle condition is satisfied, wherein
when a conduction signal is input from the sub-controller to the relay, the relay is set in a conduction state, and permits the supply of power from the battery to the main controller,
when an interruption signal is input from the sub-controller to the relay, the relay is set in an interrupting state, and interrupts the supply of power from the battery to the main controller,
the sub-controller is configured to interrupt the supply of the power from the battery to the main controller by outputting the interruption signal to the relay in case the auto idle condition is satisfied, and start the supply of the power from the battery to the main controller by outputting the conduction signal to the relay when determining that a time after the power supply is interrupted has passed a second time, and
the main controller is configured to diagnose presence or absence of the failure in the main controller when the supply of the power from the battery is started.
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