Hobart 90CU24, Руководство по эксплуатации и обслуживанию

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No. 1 Load Contactor Operating Circuit
Trouble, Symptom Test, Check, And/or
and Condition Probable Cause Remedy
1. Load contactor (K1) will not
close when output No. 1 push
button switch (24, Fig. 2) is
held in CLOSE position.
Generator running at normal
voltage. Rectifier circuit
breaker CB2 (32, Fig. 2)
closed. No fault lights on. a. Defective circuit breaker
CB2 (32, Fig. 2) Remove terminal leads from
circuit breaker, press circuit
breaker button to close circuit
breaker, and use an ohmmeter
to check for continuity. Replace
circuit breaker if defective.
b. In addition to defective
wiring and connections in
AC and DC load contactor
actuating circuits, load
contactor may be prevented
from closing for any one of
following reasons: Check all wiring and connec-
tions in load contactor circuits.
Then check components as
follows:
c. Defective (open) relay in
memory and time delay PC
board (1-1; 4, Fig. 6) Replace memory and time
delay PC board with a board
known to be operating properly.
If contactor still doesn’t close,
proceed to step (d).
d. Defective output No. 1 push
button switch (S75) (24 Fig.
2) Check AC voltage input to
contactor rectifier CR6 (1-1: 6,
Fig. 10). If voltage isn’t
approximately 115-V AC,
output No. 1 push button switch
is defective and must be
replaced.
OM-2084 / Operation and Maintenance Manual
90CU24 / Series 500392 Generator Sets
November 27/1997 Chapter 2-4
Page 15