Operation - Section 32 02/10 OM3237 Page 32-22 Operator Cab and Controls 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. For diagnostic tests of a Komatsu engine equipped with the Centry™ fuel control, refer to Centry™ Diag- nostics at the end of this section. NOTE: DO NOT perform lamp test while truck is running.
Warning faults (light on) are ones that require attention in the near future, but in most conditions, will not greatly affect governing performance. VEHICLE HEALTH MONITORING SYSTEM (VHMS) BASIC PRECAUTIONS 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. DO NOT disassemble, repair, or modify the VHMS system. This may cause failure or fire. Active fault conditions must be corrected as soon as possible. DO NOT touch any system components when operating the machine. DO NOT pull on wiring harnesses, connectors, or sensors.
This may cause short circuits or disconnections that lead to failure or fire. Refer to the lamp test/diagnostic test switch for addi- tional description of this light's function. DO NOT get water, dirt, or oil on the system controllers. Hazard Warning Light Switch If there are any problems with the VHMS system, please consult the servicing Komatsu distributor. 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.
OPERATION The VHMS system automatically monitors the condi- tion of the truck and requires no action from the truck operator and its systems. This system uses VHMS controller (2, Figure 32-12) to gather data about the operation of the truck from the sensors and other controllers installed on the truck. The data stored in the VHMS controller is col- lected by personal computer or transmitted directly by communications satellite (utilizing the Orbcomm controller). This data is then compiled by the Komatsu computer server. Based on this information, the servicing Komatsu distributor will suggest improvements or provide information aimed at reduc- ing machine repair costs and downtime.
Lamp Test Switch/Centry™ Diagnostic Test Switch This switch may be used for the lamp test, and for Cen- try™ diagnostic tests (8) on engines equipped with Cen- try™ fuel control. When data store button (2, Figure 32-13), located on the back of the center console, is pressed, it will store a snapshot of the Statex III drive system. It will also trigger the VHMS system to store a snapshot of the truck operating system. Snapshot light (4, Figure 32- 12) is a blue light that illuminates while the VHMS system is recording the snapshot. 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 32-10) 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. The VHMS system is turned on by the truck key switch. Immediately after receiving 24V power from the key switch, the VHMS controller begins the power-up initialization sequence.
This sequence takes about three seconds, during which time red LED digits (3) near the top of the controller will dis- play a circular sequence of flashing LED segments.