Hobart 5359D Operation And Maintenance Manual page 148

OM 2012
NOTE:
RCfC.?feiTCe
symbols 1 (SF, etc. ), used in the Trouble Shooting
--
Chart-, are identified on Schematic and Connection Diagrams.
3. E~&~,ertt far Trouble Shooting
A go& quality
multi-scale
VO~~I!I~WW~~ is ihe
n!y instrument
fequifcd
for
trcub1e
shooting. At lazasf two "jumpor" leads with "clligutor"
clips and test prods will be
required. The 12-V,
engine e1ectricuI sy:tzm may be
used as
a 12-V DC power
sour-ce .
if a test box, part num&r 388318-2, is avoiiabie tests
may
b made more
quickly
and accmate ly,
however, the test recepfacie connector (3 1, Fig. 1) may be 'used by
inserting the test points of a voltohmmeter into prop& terminals of thz cormector.
Refer to Fig. 8.
.
- 4. Safety ,
WARN IN G: EX!ZRCISE EXTRE~,'~ CARE TO AVOID CONTACT WITH HIGH VOLTAGE '
--
.
LEAD'S AND COMPONENTS WHICH COULD CAUSE SERIOUS SHOCK
AND INJURY IF TOUCHED WHEN TROUBLE SHOOTING OR OPiZRATIKG
THE EQUIPMENT.
5.
Parts Replacement
To lessen end item "down" time and to get a faulty machine back "on-the-line" as
quickly OS possible, the "black-box" concept of, parts replucement isreflected in the
trouble shooting chart. For example,
if a component in the protective relay trcy is
defective, fhe quickest way to remedy the situation is to replace the complete tray
assembly. and send the old tray to stock.
Assemblies which lend themselves to this concept are:
Generator control tray
Over-undervoltage module
Protective relay troy
Over-underfrequency modu ie
Voltage regulator.
Over lcad module
Pfofective monitor module
.
Electric governor ccntrol "box"
Governor actuator
3-1
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