Subcode Descriptions (Table Ii) - Komatsu 830E Shop Manual

Lockout limit (lockout_limit)
This is the limit on the number of faults which may
occur until the Dump Override Switch (DOS) will no
longer clear the restriction. For example, a GF con-
tactor fault, (code 10) has a lockout limit of three.
Every time this fault occurs, a no acceleration
restriction is placed on the propulsion system.
When the first and second GF contactor faults
occur, the driver may bring the truck to a stop and
depress the Override switch. This will clear the
restriction and allow acceleration. On the third
occurrence of the GF contactor fault within the
decay time however, the Override switch will not
remove the no-acceleration. Rather, the RESET
button on the 2-Digit Display must be pressed, then
the driver can clear the no_accel restriction with
the Override switch.
Decay time (decay_time)
Decay time is associated with lockout-limit.
The "active lockout count" is decayed by one count
every decay-time period. If the driver gets two GF
contactor faults in an hour, then the third (at least
one hour after the first GF contactor fault), he will
be able to clear the third fault with the Override
switch because the oldest of the two has "decayed"
the lockout count to one.
There are still three data packs of GF contactor
fault information in the CPU, however. If the driver
gets three GF contactor faults in one hour, the 2-
Digit Display reset is required to "decay" the "active
lockout count".
NA FAULTS
Some events, called Acceleration Inhibit faults, prohibit
the truck from accelerating. When an "acc-inh" fault is
reported, a SYSFLT lamp will illuminate in the cab and
acceleration will be prohibited.
The truck operator may clear an acceleration inhibit
fault restriction by depressing the Override switch
(DOS). When the Override switch is depressed, the
restriction is removed, unless the Active Events Count
for 1 or more event types is equal to the Lockout Limit.
If such is the case, acceleration inhibit restriction will
remain in effect until it is reset with the 2-Digit Display
or the PTU.
When reset via the 2-Digit Display RESET button, the
Override switch must be depressed next in order to
remove the fault restriction.
E2-10
EVENT SEQUENCE
The 2-Digit Display shows the event code numbers for
all event types which have Active Event Counts greater
than 0. The event types for which this is true are pre-
sented in the order in which the events have been
reported. An event appears in the list once for each
count in Active Event Counts, again in the order in
which the events were reported.
A technician may use the "up" and "down" arrow keys
on the 2-Digit Display to scroll through the list. The
"first" and "last" lights will indicate the beginning and
end of the list.
RESETTING EVENTS
When the RESET button on the 2-Digit Display is
pressed while displaying an event code, that one spe-
cific event code is reset, and the active event count is
reduced by one. If the event occurred several times,
each one must be displayed and reset to get the active
event count to zero for that event type.
If event types have Active Event Counts equal to Lock-
out Override switch (DOS) limit values, any accelera-
tion inhibit restriction is removed when the event is
reset and then the Override switch (DOS) is
depressed.
EVENT DESCRIPTIONS
Refer to Table I for a listing of all of the possible events,
what restrictions (if any) would apply, and the definition
of each type. Troubleshooting tips are also provided.
SUBCODE DESCRIPTIONS
Subcodes can only be viewed using the PTU to read
stored events. Subcodes provide additional information
for the following event code numbers: 30, 32, 33 and
37. Refer to Table II for a listing of subcodes.
Electrical Propulsion Components 2/02 E02016