Hobart 9OC24S Operation Manual page 237

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OPERATION, MAINTENANCE, AND OVERHAUL MANUAL, TM-240A
SELF-PROPELLED GENERATOR SET, SPEC. NO. 5381A
TROUBLE ,SYMPTOM,
AND CONDITIONS PROBABLE CAUSE
TEST. CHECK. AND/OR REMEDY
GENERATOR AND EXCITATION CIRCUIT (CON TIN UED)
1. (Continued) B. (Continued)
(5) (Continued)
B. (Continued)
(5) (Con tin ued)
(a) and exciter as required. If
generator produces a nor-
mal or higher voltage, see
step (6).
(6) Defective voltage
regulator (RE G)
(6)All components in the excita-
tion circuit except the voltage
regulator have been tested in
steps (1) through (5) above.
This leaves only the regulator
as a possible cause of trouble.
Replace the complete voltage
regulator.
LOAD CON TACTOR OPERATING CIRCUIT
1.. Load contactor A. In addition to defective
A. Check wiring and connections in
(1LC) will not wiring and connections the load contactor circuits on the
close when load in the AC and DC load engine control pane I, protective
con tactor control contactor actuating cir-
switch (17, Fig.
relay tray, and power module.
cuits, the load con tactor Check components as follows:
1) is placed in may be prevented from
momentary ON
closing for any one of
position. Gen-
the following reasons:
erator running at
norma I output
(1) "Blown " fuse (7FU) (1)Replace (7FU).
voltage. No
fault lights on.
(2) Defective (open) relay (2)Connect a jumper lead from
in protective monitor terminal B13, F,ig. 3 to B20,
(PM). (l-l, Fig. 7, GROUND. If load contactor
item 1) will close when switch is act-
uated, replace protective
mon i tor (PM).
-
Ott 30/73
Trouble Shooting Chart (Sheet 11 of 19)
Figure 6
3-2
Page 21