TLD GPU-406, Руководство пользователя, Страница: 44 / 74

Creation: 01.31 - 2014 2-4-16
GPU - 406
GPU - 409
28VDC Operating Circuit (Optional)
PROBLEM CAUSE REMEDY
1. The GCM displays
“FAULT LATCHED,
VOLTS LOW”.
A. A faulty connection to the coil
of the input contactor (terminals
X+ and Y- on K19) to the TR. A. Correct the wiring.
B. The contactor (K19) is faulty. B. Test the contactor in question
by applying 24VDC across its coil
(X+ and Y- terminals). Replace
the failed contactor if it does not
close.
C. A faulty connection to the
transformer T4 exists. C. Correct the wiring.
D. A faulty connection to the diode
assembly (D3) exists. D. Correct the wiring.
E. A poor ground connection
exists between the generator
neutral and 28VDC negative bus. E. Correct the wiring.
F. A poor connection exists
between the GCM and the voltage
sensing wire. F. Correct the wiring.
G. A poor connection exists
between the GCM and the
generator field exciter. G. Correct the wiring.
H. The DC voltage setting within
the GCM is too low. H. Increase the setting. Refer to
TLD 102-00688.
I. The GCM is defective. I. Replace the GCM.
2. The GCM displays
“FAULT LATCHED,
VOLTS HIGH”.
A. A poor ground connection
exists between the generator
neutral and 28VDC negative bus. A. Correct the wiring.
B. A faulty connection exists
between the GCM and the voltage
sensing wire. B. Correct the wiring.
C. The DC voltage setting within
the GCM is too high. C. Decrease the setting. Refer to
TLD 102-00688.
D. The GCM is defective. D. Replace the GCM.
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