Komatsu 930E-2, Shop Manual

Page: 225 / 739

5. Connect the PTU to the PSC communication port.
¤ c:\>ACNMENU {enter}
¤ Highlight PTU TCI & PSC {enter}
¤ Enter your name {enter}
¤ Enter your password {enter}
¤ Cursor to “Normal Operation” {enter}
¤ Cursor to PSC Real Time Data {enter}
6. On the PSC Real Time data screen:
Verify BRKR1 and BRKR2 are highlighted
when the wheel brake lock is applied.
7. Turn brake lock switch OFF.
8. In the brake cabinet, short Circuit 33 on the brake
pressure switch to ground.
The low brake pressure light on the over-
head display and the low brake pressure
buzzer should be active.
9. On the left frame rail, short Circuit 33F at the
steering pressure switch on the bleeddown mani-
fold to ground.
The low brake pressure, low steering pres-
sure lights in the overhead should come on
and the low brake pressure buzzer should
be active.
Final Checks:
1. Place the REST switch in the OFF position.
2. With the PTU still connected to the PSC port and
the PSC REAL TIME DATA screen displayed
and the engine running, compare the values dis-
played with the values shown on the sample
screen in Figure 3-8.
3. Verify AUXFB is about 1700 rpm and exhaust air
is flowing from the rear exhaust ports of the
control cabinet.
Inverter Link Voltage Check:
1. On the PSC PTU:
¤ Cursor to “Normal Operations” {enter}
¤ Cursor to “View/Set PSC Analog Outputs” {enter}
¤ Cursor to the box in the “#” column on channel 3
{enter}
¤ Type in : 200 {enter}
(Parameter name will be INV1_LINK_VOLTS)
¤ Cursor to the box in the “#” column on channel 4
{enter}
¤ Type in : 235 {enter}
(Parameter name will be INV2_LINK_VOLTS)
2. With the engine running, move the GF Cutout
switch to the NORMAL position and the Rest
Switch to the OFF position.
Both Inverter link voltages (I1LV and I2LV)
at the bottom of the screen should be the ap-
proximately the same.
3. Place the Rest switch in the ON position.
4. Press {escape} {escape].
5. Shut down engine and remove equipment.
E03015 3/01 AC Drive System Electrical Checkout Procedure E3-29
(Release 17 Software)