Operation - Section 32 OM3226 Page 32-20 Operator Cab and Controls Blower fault warning light (C5) will flash on and off. An alarm will sound if a malfunction occurs in the cooling air circuit for the alter- nator and motorized wheels. Stop the truck immediately, and notify maintenance personnel if the warning light is illuminated. Damage to electrical components may result without the proper ventilation of the blower. Blower Fault Warning Hazard Warning Light Switch Hazard warning light switch (7) flashes all the turn signal lights. Pressing the bottom side of the rocker switch toward the triangle activates these lights.
Pressing the top side of the rocker switch toward the OFF symbol turns these lights off. Service Engine Indicator (CENSE) Lamp Test Switch/Centry™ Diagnostic Test Switch When the key switch is turned to the RUN position before starting the engine, amber service engine indicator light (D6) will illuminate for about two seconds. The light will then turn off if no faults are detected in the system. If this indicator remains on, or flashes when equipped with the Centry™ fuel control sys- tem, alert maintenance personnel as soon as possi- ble. This switch may be used for the lamp test, and for Cen- try™ diagnostic tests (8) on engines equipped with Cen- try™ fuel control.
The lamp test switch is pro- vided to allow the operator to test the indicator lamps prior to starting the engine. To test the lamps and the warning horn, turn key switch (1, Figure 32-11) to the RUN position, and press the bottom side of the rocker switch for the CHECK position. All lamps will illuminate, except those which are for optional equip- ment that is not installed. The warning horn will also sound. Any lamps that do not illuminate indicate a problem in that circuit. Notify maintenance before driving the truck. Releasing the spring-loaded switch will allow the switch to return to the OFF position.
Komatsu Engines w/Centry™ Fuel Control This indicator monitors the Centry™ fuel system. During engine operation, if a fault is detected in the system, the light will turn on and stay on indicating a warning fault. For more severe faults that can affect engine operation, the light will flash indicating that immediate attention is required. Warning faults (light on) are ones that require attention in the near future, but in most conditions, will not greatly affect governing performance. For diagnostic tests of a Komatsu engine equipped with the Centry™ fuel control, refer to Centry™ Diag- nostics at the end of this section.
Severe faults (light flashing) are ones that require immediate attention, because Centry™ governor performance could be significantly affected, resulting in a backup mode of operation. Active fault conditions must be corrected as soon as possible. Refer to the lamp test/diagnostic test switch for addi- tional description of this light's function.