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OPERATION
Centinel Diagnostic Lamps
Legend for illust. (Z 23055)
Engine viewed from counterweight side
(1)
Centinel oil control valve (one on each engine)
(2)
Centinel monitor box (one on each engine)
(3)
Centinel diagnostic lamps
(4)
Left engine oil reserve tank for rear engine 1
(5)
Right engine oil reserve tank for front engine 2
(6)
Eliminator engine oil filter
(7)
Centrifugal separator
Check Centinel Diagnostic Lamps for faults
The Centinel system of each engine is monitored by two diagnos-
tic lamps (3). 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 engines
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 3D30-1 for rear engine 1 and/or 3D30-2 for front engine
2. Turn starter switch of the concerned engine 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 of the concerned engine and
release. Once the correct fault code is identified, refer to the Mas-
ter Repair Manual CENTINEL filed in volume 2 binder for fault
code explanation, and inform your Komatsu Service Organization
about the trouble condition.
3.2 CONSTRUCTION OF THE SHOVEL
65
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