4-4 Controller Troubleshooting
TP-5672 11/95
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If the normal source is available, but the source available normal LED
is not illuminated. Check the trip point settings in index 6. See TP-5664
for programming information. Are the trip points programmed correctly?
Does the microprocessor display, in index 1, rated normal source voltages and frequency?
Is the inphase
sequence option
installed?
Does the voltage between terminals
TB-AC1-NC and TB-AC1-NA of the
power supply board equal the rated
voltage for the transfer switch?
Is 3-phase
sensing used?
Does the voltage between terminals TB-AC1-NA
and TB-AC1-NB and terminals TB-AC1-NB and
TB-AC1-NC of the power supply board equal the
rated voltage for the transfer switch?
Is the voltage between pin P2-15 of
plug 2 and terminal TB-DC1-34 of the
power supply board 1/25 of line
voltage? See Appendix B Figure B-5.
Turn the generator set off. Jumper terminal
TB-DC1-24 to TB-DC1-34 of the power
supply board . Is the voltage between pin
P2-15 of plug 2 and terminal TB-DC1-34 of
the power supply board equal to 0 vac?
Is the voltage between pin P2-16 of plug 2 and
terminal TB-DC1-34 of the power supply board
1/25 of line voltage? See Appendix B Figure
B-5.
Is 3-phase
sensing used?
Is the voltage between pin P2-17 of
plug 2 and terminals TB-DC1-34 of
the power supply board 1/25 of line
voltage? See Appendix B Figure B-5.
Is the voltage between pin P2-18 of
plug 2 and terminal TB-DC1-34 of the
power supply board 1/25 of line
voltage? See Appendix B Figure B-5.
Is the transfer switch
wire with a phase
rotation of ABC?
Calibrate the controller’s
normal source voltage.
Replace the
logic board.
Correct the trip point settings
in index 6. See TP-5664 for
programming information.
Check the normal source voltage
and the wiring harness from the
contactor to power supply board
for open or shorted leads.
Check the normal source voltage
and the wiring harness from the
contactor to power supply board
for open or shorted leads.
Replace the power
supply board.
Replace the power
supply board.
Replace the power
supply board.
Replace the power
supply board.
Calibrate the normal source
voltage.
Rewire the source for
ABC phase rotation.
Calibrate the controller’s
normal source voltage.
Replace the power
supply board.
Figure 4-3. Troubleshooting— Source-available, normal error
