Komatsu PC500LC-10R Shop Manual page 124

AUTOMATIC IDLE STOP SYSTEM
NOTICE
The screen changes to the operator screen automatically and the auto idle stop function is actuated in
60 minutes after the lock lever is set to LOCK position if "Fix to x min." is selected in the "Auto Idle Stop
Time Fixing" menu even when the service menu is being used.
Check the set value of the auto idle stop function before performing the work with the service menu.
Abrupt engine stop is detected
• The failure code for a detected abrupt engine stop is sent when the engine is stopped by the automatic idle
stop function when the auto-deceleration function is OFF and the fuel control dial is at a position larger than
MIN.
• The failure code is recorded in the mechanical system abnormality record.
• If an abrupt engine stop is detected, the auto-deceleration function is automatically turned on.
• The failure code displayed at an abrupt engine stop varies with the number of occurrence, and the mes-
sage displayed on the machine monitor varies according to the failure code.
Action level Failure code
L00
L01
L03
• When the failure code "A900FR" of action level "L03" is sent, the turbocharger assembly must be tested
and replaced if necessary. Otherwise it affects the durability of the engine to decrease.
• After replacing the turbocharger assembly, reset the number of occurrence by using "Reset Number of
Abrupt Engine Stop by AIS" in "Diagnostic Tests" on Service menu.
REMARK
If the number of occurrence is not reset by using "Reset Number of Abrupt Engine Stop by AIS", failure code
"A900FR" is sent again next time and after. Be sure to perform the reset always after the turbocharger assembly
is replaced.
10-30
A900N6 Abrupt Engine Stop by Auto Idling Stop 1
A900NY Abrupt Engine Stop by Auto Idling Stop 2
A900FR Abrupt Engine Stop by Auto Idling Stop 3
10 STRUCTURE AND FUNCTION
Failure (displayed on screen)
PC500LC-10R