T.O. 35C2-3-442-2
P-9-TM-457-35
TM-07464A-35
TM 5-6115-457-34
Table 2-3. Troubleshooting (Continued)
PROBABLE CAUSE
CORRECTIVE ACTION
MALFUNCTION
GENERATOR SET (Continued)
a. Defective mode I or
a. Test relay box (para-
34. Attempting to par-
allel, without output
mode II relay box.
graph 6-96 or 6-128).
connected for
120/208 VAC, syn-
chronizing lights are
very dim.
a. Defective load contactor
35. During parallel oper-
a. Test and replace if defec-
or motor operated cir-
ation, load contactor
tive (paragraph 6-145).
cuit breaker.
or motor operated
b. Defective permissive
b. Test relay (paragraph
circuit breaker of set
6-115).
number 2 will not
paralleling relay K16
close.
(precise generator
sets).
C. Test relay
c. Defective dc relay as-
sembly, A5 in mode I
(paragraph 6-96 or 6-128).
or mode II relay box.
36. During parallel oper-
a. Defective or improp-
a. Adjust or replace rheostat
ation, generator sets
erly adjusted KVA
do not share total
rheostat R29.
KVA equally.
b. Defective parallel
b. Rebuild receptacles
c. Defective mode I or
c. Test relay box (para-
mode II relay box.
graph 6-96 or 6-128).
d. Defective exciter
d. Test exciter regulator
regulator
e. Defective current
Test and replace if defec-
e.
transformers CT4, CT5,
tive (paragraph 6-154).
or CT6.
f. Defective generator.
f. Test and repair if defec-
tive (paragraph 7-2).
2-43
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