OM3226 Operation - Section 32 Operator Cab and Controls Page 32-23 VEHICLE HEALTH MONITORING SYSTEM (VHMS) When the key switch is turned OFF, the VHMS con- troller will remain on while it finishes processing inter- nal data and saves the recent data into permanent memory. When the data has been safely stored, the two digit LED display will turn off. This process could take up to three minutes to complete. BASIC PRECAUTIONS DO NOT disassemble, repair, or modify the VHMS system. This may cause failure or fire. 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. If the 24V power is disconnected from the VHMS controller before it has completed its shut down procedure, the VHMS controller will lose all data gathered since the key switch was last turned on. DO NOT disconnect battery power until the VHMS controller has completed the shutdown procedure and has turned the LED digits off. DO NOT get water, dirt, or oil on the system controllers. If there are any problems with the VHMS system, please consult the servicing Komatsu distributor.
OPERATION The VHMS system automatically monitors the condi- tion of the truck and requires no action from the truck operator and its systems. The Orbcomm controller transmits data through antenna (1, Figure 32-13) mounted on top of the cab. The antenna coaxial cable is routed through tube (2) to protect it from damage. If the antenna or coaxial cable is damaged, replace the parts . This system uses VHMS controller (2, Figure 32-13) 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. When data store button (2, Figure 32-14), 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- 13) is a blue light that illuminates while the VHMS system is recording the snapshot. 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. FIGURE 32-13. VHMS COMPONENT LOCATION During normal truck operation, the red LED digits on the VHMS controller will count from 1-99 continuously. 1. Orbcomm Controller 2. VHMS Controller 3. LED Digits 4. Snapshot Light 5.
VHMS Download Port