Komatsu Utility 76243, Operation & Maintenance Manual

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OPERATION
EXPLANATION OF COMPONENTS
3-47
CIRCUIT BREAKER 3
q
If the starting switch does not work even when the starting
switch is turned to the ON position, open the recirculated
air filter cover to gain access to the circuit breaker.
q
If excessive current flows through the circuit breaker, it cuts
off the electric circuit to prevent damage to the electrical
components and wiring.
q
To restore the electric circuit after it has been cut off, push
in reset button (3). (This springs out when the circuit is cut
off.)
If the electric circuit is normal, reset button (3) will stay
pushed in. If it comes out immediately when it is pushed
in, the electric circuit must be checked.
REMARK
The circuit breaker is a device installed in electric circuits where a large current flows. It is installed to protect the
electric circuit. It protects the electric components and wiring from damage caused by an abnormal current in the
same way as a normal fuse. After repairing and restoring the location of the abnormality, there is no need to
replace the breaker. It can be used again.
CIRCUIT BREAKER FOR MAIN POWER SUPPLY 3
q
If the starting motor is not actuated when the starting motor
is turned ON, open the battery cover inspection window at
the rear left of the machine and inspect circuit breakers (A)
and (B).
(A) and (B) also act as the reset button.
q
If there is a surge of current, the circuit breaker shuts off
the circuit to protect the electrical components and wiring
from damage.
q
Turn the starting switch to the OFF position and reset the circuit breaker.
q
When resetting the electrical circuit after it has been shut off, press the reset button 5 to 10 minutes after the
circuit has been shut off. When the electrical circuit has been shut off, the operation of the reset button is
heavier than when the circuit is normal. The height of the reset button is the same, regardless of whether the
circuit has been shut off or has been reset, so make note of the effort of the reset button when resetting the cir-
cuit.
q
Do not keep the circuit breaker reset button longer than necessary.
q
If the starting motor does not work even when the circuit breaker has been reset, contact your Komatsu distrib-
utor.
No
Fuse
capacity
Circuit
(1) 20A Starting switch
(2) 20A Air conditioner