Shutdown After A System Failure; Blower Control Devices - Komatsu 930E-2 Shop Manual

SHUTDOWN AFTER SYSTEM FAILURE
1. Before shutting down the engine, verify the status
of the drive system warning lights on the over-
head display. Use lamp check to verify proper
lamp function.
NOTE: The Link Voltage lights on the control cabinet
Information Display Panel (6, Figure 3-1) and the
contactor box are not lamp checked.
2. If any of the red drive system warning lights
are on, DO NOT attempt to open any cabinets,
disconnect any cables, or reach inside the
retarder grid cabinet EVEN AFTER SHUTTING
DOWN THE ENGINE.
3. If all red drive system warning lights are off, apply
the parking brake, shut down the engine and
chock the wheels.
4. After the engine has been off for at least five (5)
minutes, inspect the Link Voltage lights in the
Information Display Panel (6, Figure 3-1) on the
main control cabinet, the contactor box, and back
wall of the operator cab (next to the DID panel).
If all lights are off, the retard grids, wheel motors,
alternator, and power cables connecting these
devices are safe to work on.
5. The blower motors, control cabinet and power
cables connecting these devices may still be
unsafe. To establish these devices are safe, wait
approximately 15 minutes, open the top control
cabinet cover and inspect the red lights (6, Figure
3-2) on the Auxiliary Capacitor Panel (AXCAP)
(4). If these lights are off, the blower system,
blower power cables and remainder of the control
cabinet is safe to work on. The normal de-energi-
zation time is 10 to 15 minutes.
IF THE LINK VOLTAGE RED LIGHTS IN THE CON-
TROL CABINET INFORMATION DISPLAY PANEL,
AND/OR CONTACTOR BOX, AND/OR THE BACK
WALL OF THE OPERATOR CAB CONTINUE TO BE
ILLUMINATED AFTER FOLLOWING THE ABOVE
PROCEDURE, A FAULT HAS OCCURRED.
• • • • Leave all cabinet doors in place, do not
touch the retard grid elements,
• • • • Do not disconnect any power cables or
use them as hand or footholds.
• • • • Notify the Komatsu factory representative
or Distributor immediately.
E03015 3/01 AC Drive System Electrical Checkout Procedure
(Release 17 Software)
IF THE RED LIGHTS (6, FIGURE 3-2) ON THE
BLOWER CAPACITOR PANEL (AXCAP) (4) ARE
ILLUMINATED AFTER FOLLOWING THE ABOVE
PROCEDURE, A FAULT HAS OCCURRED. (THE
NORMAL DE-ENERGIZATION TIME IS 10 TO 15
MINUTES.)
• • • • Reinstall the control cabinet panel.
• • • • Do not perform maintenance on the
Blower Capacitor Panel, blower motor, or
blower power cables.
• • • • Notify the Komatsu factory representative
or Distributor immediately.
FIGURE 3-2. BLOWER CONTROL DEVICES
1. Snubber Panel
2. Auxiliary Power Filter Inductor (AXIND)
3. Auxiliary Phase Control Rectifier and Power
Inverter Module (AXINV)
4. Auxiliary Power Filter Capacitor Bank (AXCAP)
5. Information Display Panel
6. Blower Control System Warning LED's
7. Propulsion System Controller (PSC)
8. Control Cabinet (RH Side, Top View)
E3-3