Komatsu 930E-2, Shop Manual

Page: 214 / 739

PSC Checkout Procedure
PSC Digital Output Tests:
1. Turn OFF the Control Power Switch.
2. Place the Rest Switch In the cab in the OFF
position. Turn Park Brake switch ON.
3. Disconnect the round connector at the top of each
Phase Module and Chopper Module.
4. Connect the serial communication cable from the
PTU to the PSC port, behind the center console
on the driver’s side.
5. Turn ON the Control Power Switch.
6. Type the following on the PTU keyboard:
¤ c:\>ACNMENU {enter}
¤ Highlight “PTU TCI and PSC” {enter}
¤ Type your name {enter}
¤ Type your password {enter}
¤ Cursor to “Engine Stopped Tasks” {enter}
¤ Cursor to “Manual Test Mode” {enter}
7. Highlight the devices listed in steps 1 through 11
in the Table below on the digital output section on
this screen and then press {enter}. Press {enter}
again to turn off
8. For step 14 (GD1E) in Table IV below, use an AC
voltmeter set on 750V AC scale to check for 90
to 100 volts AC between the pins on each round
connector removed in step 3 (cable side) to In-
verter 1, (top row).
9. Use the AC voltmeter to check for 90 to 100 volts
AC between the pins on the round connector on
the top of Chopper Module One (CM1 G-X) re-
moved in step 3.
¤ Press {escape} {escape}
10. Turn OFF the Control Power Switch
11. Reconnect the round connectors to Inverter 1.
12. Reconnect the round connector to Chopper Mod-
ule 1.
TABLE IV: PSC DIGITAL OUTPUT TEST
STEP DO NAME DESCRIPTION DEVICE CHECKOUT
1 GF GF Contactor
Verify the GF contactor picks up and GFFB is highlighted on the PTU
(NOTE: The GF Cutout Switch must be in the NORMAL (up) position to
check).
2 GFR GFR Contactor Verify the GFR relay picks up and GFRFB is highlighted.
3 RP1 RP1 Contactor Verify RP1 picks up and RP1FB is highlighted.
4 RP2 RP2 Contactor Verify RP2 picks up and RP2FB is highlighted.
5 RP3 RP3 Contactor Verify RP3 picks up and RP3FB is highlighted.
6 CPRL Control Power Relay
With CPRL highlighted turn off CPS and verify that control power is not
lost. Turn CPS back on.
7 AFSE Alternator Field Static Exciter
With AFSE highlighted verify 24 volts to ground on the “+25” terminal on
the AFSE terminal board.
8 SYSRUN Control System OK LED
Verify the second LED from the top (labelled Control System OK), located
on Information Display Panel on the side of the control cabinet is ON.
9 TEST Test Mode LED
Verify the fourth LED from the top (labelled Test Mode), located on the
Information Display Panel on the side of the control cabinet is ON.
10 REST Rest Mode LED
Verify the fifth LED from the top (labelled Rest Mode), located on the
Information Display Panel on the side of the control cabinet is ON.
11 SYSFLT System Fault LED
Verify the third LED from the top (labelled System Fault), located on the
side of the control cabinet is on.
For steps 12 & 13, jumper a 20K ohm resistor across circuits 72FD (TB23) to 712 (TB32) and a 20K ohm resistor across circuits 79RD
(TB23) to 712 (TB32). Remove resistors after steps 12 and 13 are completed.
12 FORT Forward Travel Direction Verify circuit 72FD changes from 24VDC to 0VDC when FORT is activated
13 REVT Reverse Travel Direction Verify circuit 79RD changes from 24VDC to 0VDC when REVT is activated
14 GD1E
Gate Drive Power, Inverter 1 Enable
Signal
Refer to steps 8 through 15 in digital output test procedure.
15 GD2E
Gate Drive Power, Inverter 2 Enable
Signal
Refer to steps 16 through 24 in digital output test procedure.
16 CMCTL Chopper Module Control Do not check.
17 AUXRESET AUX Inverter Reset Do not check.
E3-18 AC Drive System Electrical Checkout Procedure 3/01 E03015
(Release 17 Software)