2-Digit Display Panel; Events - Komatsu 830E Shop Manual

2-DIGIT DISPLAY PANEL

The 2-Digit Display panel (Figure 2-1.), located in the
control cabinet, consists of the following:
•
Two digit "event" number display,
•
"First" LED
•
"Last" LED
•
"Previous (up arrow) search key
•
"Next" (down arrow) search key
•
"Reset" key
Under normal operation, with no events having been
recorded, the 2-Digit Display Panel will display only two
zeros (00). The "first" LED and the "last" LED will be
dark (not illuminated). The "previous" and "next" search
keys will be illuminated (green). The "reset" key will
also be illuminated (red).
NOTE: The terms "event" and "fault" are used inter-
changeably to indicate a system occurrence which has
been recorded into memory. The system recognizes
each as an event, that is, a fault is nothing more to the
system than an event. Some events (or faults) result in
restrictions being placed on truck operation. Therefore,
when discussing a fault situation, the term "fault"
seems more appropriate and less confusing.
THE CODED NUMBER
The 2-Digit Display panel displays a coded two digit
number. This number indicates certain data stored in
the memory of the CPU card regarding the recent oper-
ating history of the truck's propulsion and control sys-
tems. Refer to Table I for a description of the two digit
code numbers ranging from 00 to 99.
If an active fault condition exists, in which a fault has
not been locked out or reset, the corresponding fault
number will appear on the display. For example, if the
P1 contactor is out of position, a number thirteen (13)
will be displayed. By referring to Table I, you can
quickly determine that a 13 refers to P1 contactor.
Troubleshooting tips are provided for isolating the
cause of the fault.
If another fault were to occur, such as the RP1 feed-
back indicating that RP1 contactor is in the wrong posi-
tion, a number seventeen (17) would be displayed.
Referring to Table I, you could see that a problem
exists with the RP1 contactor. You can also see that
the "last" LED is illuminated and the "first" LED is extin-
guished. This means that event 17 is the last one
stored in the 2-Digit Display. To view the first event,
simply press the "previous" search key (up arrow).
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If the first event were being displayed, the "first" LED
would be illuminated and the "last" LED would be off.
This indicated that the event being displayed is the first
one in the CPU memory and that there are additional
events to be displayed. To view the last event, press
the "next" search key (down arrow).
Once a fault has been serviced, press the "reset" key
and the event will be reset. If the problem has not been
corrected, the fault will be relogged the next time it
occurs.
NOTE: Resetting the fault from the 2-Digit Display does
not remove the event from the CPU memory on the
FB101 card in the FL275 panel. This can only be done
using the Portable Test Unit (PTU).

EVENTS

This panel provides a variety of operational and fault
codes which electronically document certain system
events. For this reason, these codes are referred to as
"event" codes.
The diagnostic system on the CPU card stores up to
500 events. If more are encountered after the storage
is full, the system will purge the oldest event to make
room for the newest event. It will then record the fact
that this purge has occurred.
Stored events can only be removed from the system
using the PTU, or by being purged by the system when
new events occur after the storage is full.
When an event is reported, the system records the
time and date, as well as the event's code, subcode,
and 2 floating point values. This data, besides the time
and date, are determined by the section of software
reporting the event. This data is stored in the com-
puter's memory and the "event" code is displayed on
the 2-Digit Display panel.
Electrical Propulsion Components
FIGURE 2-1. 2-DIGIT DISPLAY PANEL
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