Cylinder Cut-Out Operation - Komatsu PC210-8 Shop Manual

UEN00229-01

Cylinder Cut-Out operation

The operator can perform "Cylinder Cut-Out" oper-
ation with the machine monitor.
"Cylinder Cut-Out" operation means to run the
engine with 1 or more fuel injectors disabled electri-
cally to reduce the number of effective cylinders.
This operation is used to find out a cylinder which
does not output power normally (combustion in it is
abnormal).
1. Selecting menu
Select "Cylinder Cut-Out" on the service menu
screen.
2. Selecting cylinder to be disabled
After the "Cylinder Cut-Out" screen is dis-
played, select a cylinder to be Cut-Out with the
function switches.
[F1]: Move selection mark (R) to left
q
[F2]: Move selection mark (R) to right
q
[F3]: Reset holding
q
[F4]: Hold
q
[F5]: Return to service menu screen
q
[F6]: Confirm selection
q
a This operation may be performed while
the engine is running.
a When [F6] is pressed, if background (a) of
the selected cylinder No. becomes white,
the cylinder is Cut-Out.
a If the machine monitor Cut-Out a cylinder
but the engine controller cannot Cut-Out
that cylinder, the background of the cylin-
der No. becomes yellow.
a If the machine monitor resets a Cut-Out
cylinder but the engine controller cannot
reset that Cut-Out cylinder, the back-
ground of the cylinder No. becomes red.
a One or more cylinders can be Cut-Out.
a In the cylinder Cut-Out operation, the
a u t o - d e c e l e r a t i o n f u n c t i o n c a n b e
selected. If the auto-deceleration is turned
ON, auto-deceleration monitor (b) is dis-
played.
56
3. Resetting Cut-Out cylinder
When changing a cylinder to be Cut-Out or
when Cylinder Cut-Out operation is finished,
select a Cut-Out cylinder to be reset with the
function switches.
a This operation may be performed while
the engine is running.
a When [F6] is pressed, if background (a) of
the selected cylinder No. becomes blue,
the cylinder is reset.
a The Cut-Out operation is not automatically
reset after the screen returns to the opera-
tor mode. Accordingly, be sure to perform
the resetting operation after the cylinder
cut-out operation is finished.
4. Function of holding displayed information
If [F4] is pressed during the cylinder Cut-Out
operation, the displayed information is newly
held (c) (The real-time information is kept dis-
played on the left side).
While the information is held, if [F3] is pressed,
the holding function is reset.
a The holding function is effective, regard-
less of setting of the reduced cylinder
mode operation.
30 Testing and adjusting
PC210, 230, 240-8