Komatsu PC500LC-10R Shop Manual Download

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HANDLE BATTERY DISCONNECT SWITCH

(O): OFF position
(I): ON position

• Battery disconnect switch (1) is usually used in the follow-

ing cases in the same purpose of disconnecting the cable
from the negative terminal of the battery.

• When storing the machine for a long period (1 month

or longer)

• When servicing or repairing the electrical system
• When performing the electric welding
• When handling the battery
• When replacing the fuse, etc.

• When the battery disconnect switch (1) is at OFF position, all the continuous power supplies for the compo-

nents including the starting switch B terminal and controllers are all cut out. It is the same state as the time
when the battery is not connected. Accordingly, none of the electrical systems of the machine operates.

If the battery disconnect switch (1) is turned to ON position by unauthorized person, it is extremely

dangerous.

NOTICE
When turning the battery disconnect switch (1) to OFF po-
sition, always remove the switch key (1).

• The controllers are protected from abnormal disconnec-

tion, which shuts off the battery power supply circuit even
when the controllers are operating. Check the system op-
erating lamp (2) is lit and see if controllers are in operation.

• Before shutting off the battery power supply circuit, turn the

starting switch to OFF position, and check that the system
operating lamp goes out, then turn the battery disconnect
switch to OFF position.

• If the battery disconnect switch is turned to OFF position (the battery power supply circuit is shut off) while

the system operating lamp is lit, a controller data loss error may occur. Do not operate the battery discon-
nect switch while the system operating lamp is lit.

• The system operating lamp goes out in a maximum of 6 minutes after the starting switch is turned to OFF

position.

• The system operating lamp may sometimes light up while the starting switch is turned to OFF position be-

cause KOMTRAX terminal may maintain its communication under this condition.

• Even if the system operating lamp is not lit it may seem to be lit slightly because of a very little current in-

side the controller. This phenomenon does not indicate abnormality.

• The KOMTRAX terminal performs communication periodically even if the starting switch is kept in OFF

position, thus it repeats starting and stopping.

• The start and stop cycle (sleep cycle) of KOMTRAX terminal varies depending on the factors including

the communication state and the time when the machine is not in operation, and the lamp may be lit
continuously for a maximum of approximately 1 hour.

• If the system operating lamp stays lit when you want to cut off the battery circuit for maintenance, turn the

starting switch to ON position first, then turn it to OFF position. The lamp goes out in the maximum of six
minutes. After the system operating lamp goes out, turn the battery disconnect switch immediately to OFF
position.

Komatsu PC500LC-10R, Shop Manual

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