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OPERATION
Centinel Diagnostic Lamps
Legend for illust. (Z 23084)
View from counterweight side
(1)
Fire wall between engine room and pump compartment
(2)
Pump distributor gear (PTO)
(3)
Emergency engine shut down switch
(4)
Centinel monitor box (designation in electrical diagram: 3H10-1)
(5)
Centinel diagnostic lamps
(6)
Pre-lube time relay (designation in electrical diagram: 3D30)
(7)
Centrifugal separator of the engine oil Eliminator filter
Check Centinel Diagnostic Lamps for faults
The Centinel system of the engine is monitored by two diagnostic
lamps (5). The green lamp indicates the Centinel system has
power and is operating. The red lamp indicates that a system
parameter is not within specification. Check the diagnostic lamps
at regular intervals. If the red lamp is illuminated, stop the engine
and turn key switch to OFF position. Turn key switch to ON posi-
tion. To prevent starting of the engine, remove plug from pre-lube
time relay (6).
Turn starter switch and release.
Look at the red lamp, it should start flashing a three-digit code.
This code will be associated with a fault code. The codes are read
as follows:
1. If the red lamp flashes three times, the first digit is "3", the
number of flashes will indicate the first digit of the code.
2. There will be a pause.
3. If the red lamp flashes four times, the second digit of the fault
code will be "4", the number of flashes will indicate the sec-
ond digit of the code.
4. There will be another pause.
5. If the red lamp flashes two times, the third digit of the fault
code is "2", the number of flashes will indicate the third digit of
the code.
6. In this example, the code is 3-4-2. Fault code 342 is a Centi-
nel Control Module Calibration fault.
At this point, there will be a longer pause before the fault code will
be flashed again. This process will occur four times. After the
fourth time, the fault lamp will stay red if the fault is still active. To
read the code again, turn the key switch to OFF position and back
to ON position. Turn starter switch and release. Once the correct
fault code is identified, refer to the Master Repair Manual
CENTINEL filed in volume 2 binder for fault code explanation, and
inform your Komatsu Service Organization about the trouble con-
dition.
3.2 CONSTRUCTION OF THE SHOVEL
67
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