4-19
Controller Troubleshooting
TP-5672 11/95
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Is the start LED illuminated?
Is there 1 vdc between pin P4-1
of plug 4 and terminal TB-DC1-34
of the power supply board?
Jumper terminals 3 and 4 on
the power conversion unit.
Does the generator set start?
Remove the jumper between terminals 3
and 4. Jumper terminals TB-DC1-21 and
TB-DC1-22 of the power supply board.
Does the generator set start?
Is there a jumper between terminals
TB-DC1-22 and TB-DC1-31 of the
power supply board?
Jumper terminal TB-DC1-22 to terminal
TB-DC1-31 of the power supply board
together. Does the generator set start?
Is there an accessory wired between
terminals TB-DC1-22 and TB-DC1-31
of the power supply board
Is there continuity between terminal
TB-DC1-21 of the power supply
board and pin P24-11 of plug P1?
Is there continuity between terminal
TB-DC1-21 of the power supply
board and pin P24-15 of plug P1?
Replace the
logic board.
Replace the power
supply board.
Add a jumper between
terminal TB-DC1-22 to
terminal TB-DC1-31 of the
power supply board.
Check that the accessory
is wired correctly. See
Section 5 Accessories
Check the power conversion unit
wiring for open or shorted leads.
Replace the power
supply board.
Check the generator set and
the generator set wiring.
Replace the power
supply board.
Replace the power
supply board.
Figure 4-12. Troubleshooting— Engine will not start.